Page 2 Service Manual HP 8563A Spectrum Analyzer FliP. HEWLETT PACKARD HP Part No. 08563-90017 Microfiche Part No. 08563-90018 Printed In USA September 1990 •. - '.Il...
Page 3 • @Copyright Hewlett-Packard Company 1990 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. 1212 Valley House Drive, Rohnert Park, CA 94928-4999, USA...
Page 4 For warranty service or repair, this product must be returned to a service facility designated by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to HP from another country.
Page 5 • Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. The caution sign denotes a hazard. It calls attention to a procedure which, Caution if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
Page 6 • Tells you how to make measurements with your spectrum analyzer. • Tells you how to program your spectrum analyzer. HP 8560A/8561B/8563A Quick Reference Guide (5958-7050) • Is an abbreviated version of the HP 8560A/8561B/8563A Operation and Programming Manual .
Page 7: Table Of Contents
General Information Manual Organization Manual Text Conventions Serial Numbers ..Instrument Variations HP 85629B Test and Adjustment Module Service Kit ..Recommended Test Equipment ..Electrostatic Discharge Reducing Potential for ESD Damage Static Safe Accessories.
Page 8 • 15. External Mixer Amplitude Adjustment 2-54 16. Second IF Gain Adjustment 2-57 17. SIG ill Oscillator Adjustment . 2-60 18. YTF Adjustment ..2-63 3. Assembly Replacement Access to Internal Assemblies. Cable Color Code..Procedure 1. Analyzer Cover Assembly Procedure 2.
Page 9 Error Messages ..6-15 Viewing Multiple Messages .. 6-15 Error Message Elimination 6-16 Remote HP-m Errors (100 to 150) 6-16 System Errors (200 to 201) .. 6-17 AI>C Errors (250 to 251) ... 6-17...
Page 10 • Flatness Compensation Amplifiers (part of A15) 6-36 Synthesizer Section ... . . 6-37 Sweeping the First LO ... 6-37 Reference PLL (part of A15) 6-37 YTO PLL (A7, All, part of A14, part of A15)
Page 11 • Analog Bus Drivers 7-26 Analog Bus Timing 7-27 Interface Strobe Select . 7-28 8. IF Section Troubleshooting Using the TAM Troubleshooting A4 with the TAM Troubleshooting A5 with the TAM Troubleshooting A16 with the TAM Automatic IF Adjustment Parameters Adjusted Requirements.
Page 12 • 9. Controller Section Troubleshooting Using the TAM Blank Display ..Digital Signature Analysis (DSA) Display Problems ..Line Generators Blanking..Display Jumbled or Trace Off Screen Intensity.
Page 13 • 11. RF Section Troubleshooting Using the TAM . . . 11-2 Low Band Problems (9 kHz to 2.9 GHz) 11-4 High-Band Problems (2.75 GHz to 22 GHz) 11-5 Low and High Band Problems 11-5 A7 LODA (LO Distribution Amplifier) 11-6 A8 Dual Band Mixer 11-7...
Page 14 3-9. Assembly Cables 3-17 3-10. Coaxial Cable Clip ..3-19 3-11. HP-ffi and AlAI WI Cable Placement 3-20 3-12. A6 Power Supply Connections 3-22 3-13. A6 Power Supply Cover ..
Page 15 • 3-19. AI0 Mounting Screws 3-33 3-20. A12 Mounting Screws 3-35 3-21. A12 Wiring Diagram ....3-36 3-22. A14 Frequency Control and A15 RF Assembly Removal 3-39 3-23.
Page 16 • 8-30 8-15. Faulty Crystal Symmetry ..8-34 8-16. Output Waveform, 10 kHz Resolution Bandwidth 8-35 8-17. Output Waveform, 3 kHz Resolution Bandwidth 8-36 8-18. Output Waveform, 1 kHz Resolution Bandwidth 8-37 8-19. Output Waveform, 300 Hz Resolution Bandwidth 8-37 8-20.
Page 17 • Tables 1-1. Instrument Variations 1-2. Service Kit Contents 1-3. Static-Safe Accessories. 1-4. Hewlett-Packard Sales and Service Offices 1-10 1-5. Recommended Test Equipment 1-11 2-1. Related Adjustments ..2-2. Adjustable Components 2-3. Factory Selected Components . 2-4. TAM Adjustments ..
Page 18 12-1. WI Power-Cable Connections 12-3 12-2. Automatic Fault Isolation References 12-4 12-3. TAM Tests versus Test Connectors 12-5 • A-I. HP 8563A Spectrum Analyzer Documented Assemblies A-2. RF Board Assemblies Shipped with HP 8563As Serial Prefixed below 3029A • Contents-12...
Page 19: General Information
General Information This HP 8563A Spectrum Analyzer Service Manual contains information required to adjust and service the HP 8563A Spectrum Analyzer to the assembly level. Manual Organization Volume 1 Chapter 1, General Information, contains information about service kit contents, recommended test equipment, returning an instrument for service, and sales and service offices.
Page 20: Manual Text Conventions
Serial Numbers Hewlett-Packard makes frequent improvements to its products to enhance their performance, usability, or reliability. HP service personnel have access to complete records of design changes to each type of equipment, based on the equipment's serial number. Whenever you contact HP about your analyzer, have the complete serial number available to ensure obtaining the most complete and accurate information possible.
Page 21: Instrument Variations
SERIAL NUMBER Figure 1-1. Serial Number Label Example Instrument Variations There are options available to the HP 8563A Spectrum Analyzer. The following table lists these options and identifies the assemblies which are unique to them. Table 1-1. Instrument variations Option...
Page 22: Hp 85629B Test And Adjustment Module
• HP 85629B Test and Adjustment Module When attached to the spectrum analyzer's rear panel, the HP 85629B Test and Adjustment Module (TAM) provides diagnostic functions for the HP 8563A. Because the TAM connects directly to the analyzer's internal data and address bus, it controls the analyzer's hardware directly.
Page 23: Electrostatic Discharge
• Electrostatic Discharge Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore, all work performed on assemblies consisting of electronic components should be done at a static-free work station. Figure 1-2 is an example of a static-safe work station using two kinds of ESD protection: •...
Page 24: Static Safe Accessories
92176D These accessories can be ordered either through a Hewlett-Packard Sales Office or through HP DIRECT Phone Order Service. In the USA, the HP DIRECT phone number is (800) 538-8787. Contact your nearest Hewlett-Packard Sales Office for more information about HP DIRECT availability in other countries.
Page 25: Returning Instruments For Service
• Returning Instruments for Service Service Tag IT you are returning the instrument to Hewlett-Packard for servicing, fill in and attach a blue service tag. Service tags are supplied in the back of this volume. Please be as specific as possible about the nature of the problem. IT you have recorded any error messages that appeared on the screen, or have completed a performance test record, or have any other specific data on the performance of the analyzer, please send a copy of this information with the unit.
Page 26: Hp8563A Shipping Container And Cushioning Materials
• 8. Retain copies of all shipping papers. • Item Description HP Part Nmnber 9211-5636 Outer Carton 08590-80013 Pads (2) 08590-80014 Bottom Tray Figure 1.3. HP8563A Shipping Container and Cushioning Materials • General Information...
Page 27: Sales And Service Offices
• Sales and Service Offices Hewlett-Packard has sales and service offices'around the world providing complete support for Hewlett-Packard products. To obtain servicing information, or to order replacement parts, contact the nearest Hewlett-Packard Sales and Service Office listed in Table 1-4. In any correspondence, be sure to include the pertinent information about model numbers, serial numbers, and assembly part numbers.
Page 28: Hewlett-Packard Sales And Service Offices
• Table 1-4. Hewlett-Packard Sales and Service Offices IN THE UNITED STATES IN AUSTRALIA IN JAPAN California Hewlett-Packard Australia Ltd. Yokogawa- Hewlett- Packard Ltd. Hewlett-Packard 31-41 Joseph Street 29-21 Takaido-Higashi, 3 Chome 1421 South Manhattan Ave. Blackburn, Victoria 3130 Suginami-ku Tokyo 168 P.O.
Page 29: Recommended Test Equipment
Equipment Critical Specifications Recommended Model Spectrum Analyzer Frequency Range: 4 kHz to 7 GHz Typical Residual FM: <1 Hz Pk-to-Pk HP 8566A/B in 20 Synthesized Frequency Range: 10 MHz to 22 GHz HP 8340A/B2 P,A,M,T,V Sweeper Frequency Accy (CW): 1 x 1O-...
Page 30 Frequency Range: 100 kHz to 2.9 GHz HP 8482A2 P,A,T,M,V Maximum SWR: 1.1 (1 MHz to 2.0 GHz) Maximum SWR: 1.30 (2.0 GHz to 2.9 GHz) HP 8485A 2 Power Sensor Frequency Range: 50 MHz to 26.5 GHz P,A,T,M,V Maximum SWR: 1.15 (50 to 100 MHz) Maximum SWR: 1.10 (100 MHz to 2 GHz)
Page 31 Frequency Range: dc to 2.9 GHz Attenuator Maximum SWR: 1.25 (12.4 to 22 GHz) > 5005AfB Signature Multimeter Clock Frequency 10 MHz HP 11708A Supplied with HP 8484A Reference Attenuator • P=Performance Testsj A=AdjustmentSj M=Test and Adjustment Module; T=Troubleshootingj V=Operation Verification 2Part of Microwave Workstation...
Page 32 Table 1-5. Recommended Test Equipment (continued) Equipment Critical Specifications Recommended Model Termination Frequency Range: dc to 22 GHz HP 909D P,M,V Impedance: 50n Maximum SWR: <1.22 Connector: APC 3.5 Blocking Capacitor Frequency Range: 4 kHz to 1 MHz HP 08553-60169...
Page 33 Table 1-5. Recommended Test Equipment (continued) • Equipment Critical Specifications Recommended Model Adapter Type N (m) to SMA (f) HP 1250-1250 (2 required) Adapter Type N (m) to APC 3.5 (m) HP 1250-1743 P,A,M,V (2 required) Adapter Type N (m) to APC 3.5 (f)
Page 34 Model Cable HP-IB (required for using HP 10833B P,A,M (12 required) Operation Verification Software and using HP 85629B TAM) Length: 2 m (6.6 ft) Test Cable Connectors: BNC (m) to 5MB (f) HP 85680-60093 Length: ~61 cm (24 in) Controller...
Page 35 • Reference HP Part Description Designator Number 0160..5491 CAPACITOR-FXD 240PF CER 0160..5439 CAPACITOR-FXD 510PF CER 0160..4825 CAPACITOR-FXD 560PF CER 0160..5439 CAPACITOR-FXD 510PF CER 0160..5491 CAPACITOR-FXD 240PF CER 9100..3551 COIL-MLD 1J.'H 9140..0264 COIL-MLD 1.2J.'H 9100..0264 COIL-MLD 1.2J.'H 9100..3551 COIL-MLD 1J.'H NOTE: Capacitors must be ceramic, and small body inductors must not be used .
Page 36: Adjustment Procedures
Introduction This chapter contains information on automated and manual adjustment procedures. Perform the automated procedures using the HP 85629B Tests and Adjustment Module (TAM). Never perform adjustments as routine maintenance. Adjustments should be performed after a repair or performance test failure.
Page 37: Safety Considerations
• Safety Considerations Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operation and to prevent damage to the instrument. Service and adjustments should be performed only by qualified service personnel.
Page 38: Adjustment Tools
Adjustment Tools • For adjustments requiring a nonmetallic tuning tool, use fiber tuning tool, HP part number 8170-0033. For adjustments to the IF Bandpass, use tuning tool, HP part number 8710-1010. Never try to force an adjustment control. This is especially critical when tuning variable capacitors and slug-tuned inductors.
Page 39: High-Voltage Power Supply Adjustment
• Table 2-1. Related Adjustments (1 of 2) Assembly Changed Perform the Following Related Adjustments in the Order Listed Adjustment or Repaired Number AlAI Keyboard No related adjustment AlA2 RPG No related adjustment A2 Controller Display Adjustment If EEROM from old A2 Controller could not be used in new A2 or if EEROM must be replaced, also perform the following adjustments: External Mixer Amplitude Adjustment...
Page 40: Display Adjustment
A15A1 2nd IF Amplifier Second IF Gain Adjustment A15A2 Sampler Sampling Oscillator Adjustment A16 Cal Oscillator IF Amplitude Adjustment A17 CRT Driver Display Adjustment Display Adjustment A18V1 CRT A19 HP-IB No related adjustment A210CXO 10 MHz Reference Adjustment (OCXO) • Adjustment Procedures...
Page 41: Adjustable Components
• Table 2-2. Adjustable Components (1 of 3) Reference Adjustment Adjustment Description Designator Name Number A2R206 DGTLXGAIN Adjusts the horizontal gain in the X line generator. A2R209 SWEEP OFFSET Adjusts the beginning of the trace to the leftmost vertical graticule line in fast-analog zero-span mode. A2R215 DGTLY GAIN...
Page 42 • Table 2.2. Adjustable Components (2 of 3) Reference Adjustment Adjustment Description Designator Name Number A5T502 XTAL CTR4 Adjusts center frequency of fourth stage of crystal bandwidth filter to 10.7 MHz. A6R410 HV ADJ Adjusts the voltage between A6TP405 and A6TP401 to the voltage marked on the A6Al High Voltage Module.
Page 43 • Table 2.2. Adjustable Components (3 of 3) Reference Adjustment Adjustment Description Desi~ator Name Number A15R561 CAL AMPTD Adjusts amplitude of the 300 MHz calibrator signal to -10.0 dBm. A15R926 EXT BIAS ZERO Adjusts zero bias point of external mixer bias. A16R32 CAL OSC AMPTD Sets calibration oscillator output power...
Page 44: Using The Tam
• Using the TAM The HP 85629B TAM can be used to perform 12 of the 18 HP 8563A adjustment procedures. Table 2-4 lists the TAM adjustments and their corresponding manual adjustments. The TAM adjustments do not include procedures for choosing factory-selected components.
Page 45: Adjustment Indicator
When connecting signals from the HP 8340A/B (or any microwave source) Note to the adjustment setup, use a high-frequency test cable with minimum " attenuation to 22 GHz. HP part number 8120-4921 is recommended for its ruggedness, repeatability, and low insertion loss. Adjustment Indicator To aid in making adjustments, the TAM displays an "Analog Voltmeter Display Box"...
Page 46: Required Test Equipment For Tam
Synthesizer/Level Generator HP 3335A Test Cable (SMB to BNC) 85680-60093 Sampling Oscillator Manual Probe Cable Frequency Counter (3 to 6.8 GHz) HP 5342A, HP 5343A LO Distribution Amplifier Power Meter HP 8902A, HP 436A, HP 438A Power Sensor HP 8485A (3 to 6.8 GHz, 10 to 20 dBm)
Page 47: High-Voltage Power Supply
• 1. High-Voltage Power Supply Assembly Adjusted A6 Power Supply Related Performance Test There is no related performance test for this adjustment. Description The high-voltage power supply is adjusted to the voltage marked on the A6Al HV Module. The A6Al HV Module is characterized in the factory to ensure that the display filament voltage is set to 6.0 V rms when the +110 V dc (nominal) supply is set to the voltage marked on the HV Module.
Page 48 6. Adjust A6R410 HV ADJ for a voltage equal to the voltage recorded in step 5. 7. Set the HP 8563A {LINE] switch off and disconnect the power cord. Waitat least 30 seconds for the high-voltage power supply capacitors to discharge.
Page 49: Display Adjustment
ANALYZER • INPUT ADAPTER ATTENUATOR CABLE Figure 2-2. Display Adjustment Setup Equipment 10 dB VHF Step Attenuator HP 355D Adapters Type N (m) to BNC (f) 1250-1476 Cables BNC, 122 cm (2 HP 10503A required) Procedure 1. Set the analyzer's switch OFF.
Page 50 2. Display Adjustment • Preliminary Adjustments 2. Set A17R55 X GAIN, A17R75 Y GAIN, A17R92 DDD, A17R93 ASTIG, A2R206 DGTL X GAIN, A2R215 DGTL Y GAIN, A2R262 STOP BLANK, and A2R263 START BLANK to midrange. Also set the rear-panel X POSN, Y POSN, and TRACE ALIGN to midrange.
Page 51 A17R4 Z GAIN until the intensity at the center of the screen is 15 NITs. ilii.~(t!, ;1I.~,iil_j. 17. Press L ocate the dot just below the HP logo. (CAL ], Adjust A17R93 ASTIG for the smallest round dot possible. DEFLECTION...
Page 52 Fast Zero Span Adjustments • 22. Set A2R218 VIDEO OFFSET and A2R268 VIDEO GAIN to midrange. 23. Set the HP 355D to 30 dB attenuation. 24. Press on the analyzer, and connect the equipment as shown in Figure 2-2. Set...
Page 53: If Bandpass Adjustment
SPECTRUM ANALYZER DVM TEST LEADS DIGITAL VOLTMETER -.lcooccaoa A5 IF" BOARD occClooaa OCOCOCClOQa CCCCCOcaoo Figure 2-4. IF Bandpass Adjustment Setup Equipment Digital Voltmeter " HP 3456A DVM Test Leads HP 34118A Special Tuning Tool 8710-1010 • 2.18 Adjustment Procedures...
Page 54 Reconnect the power cord and set the switch on. Allow the analyzer to warm up for (LINE] at least 30 minutes. 2. Connect the negative DVM lead to pin 6 of A5J6. See Figure 2-4. Set the HP 3456A controls as follows: FUNCTION DC VOLTS RANGE 3.
Page 55: Factory-Selected Lc Filter Capacitors
7.5 to 8.5 8.5 to 9.5 9.5 to 10 Indicates a condition that should not exist; suspect broken hardware. XTAL Bandpass Adjustments 13. On the HP 8563A, press (SPAN) (MHz! (CAL). 14. Move the positive DVM test lead to A5TP7.
Page 56: Factory-Selected Xtal Filter Capacitors
DVM reading and the presently loaded capacitor value. Table 2-10 lists a few capacitor part numbers . Caution Set the HP 8563A switch off before removing or replacing any shield. [LINE) • 18. Move the positive DVM test lead to A5TP8.
Page 57: Capacitor Part Numbers
IF Bandpass Adjustment • Table 2-10. Capacitor Part Numbers Capacitor Value (pF) HP Part Number 0160-4793 0160-4792 0160-4791 0160-4790 0160-4789 0160-4788 0160-5699 0160-4787 0160-5903 0160-4786 • • 2-22 Adjustment Procedures...
Page 58: If Amplitude Adjustment
IF Amplitude Adjustment • 4. IF Amplitude Adjustment Assembly Adjusted Al6 Cal Oscillator A5 IF Assembly Related Performance Test IF Gain Uncertainty Test Scale Fidelity Test Description This adjustment sets the output amplitude of the Al6 Cal Oscillator and the absolute amplitude of the reference 15 dB attenuator.
Page 59 [LINE] in the service position as illustrated in Figure 2-5. 2. Disconnect W29, violet coax cable, from A5J3. Connect the test cable between A5J3 and the 50n output of the HP 3335A. Set the HP 8563A switch on. [LINE] A16 Cal Oscillator Amplitude Adjustment 3.
Page 60 Reference Attenuator Adjustment 11. Set the HP 3335A to -60 dBm. [AMPLITUDE) 12. Connect a BNC cable between the 50n output of the HP 3335A and the HP 8563A INPUT 50n. 13. On the HP 8563A, press and,,,,,,,,,, •. Use the front-panel knob or step...
Page 61 4. IF Amplitude Adjustment • 30. Use the knob or step keys to adjust the REF LEVEL CAL setting until the MKR reads -10.00 dBm :1::0.1dB. 31. On the HP 8563A, press • • 2-26 Adjustment Procedures...
Page 62: Sampling Oscillator Adjustment
5. Sampling Oscillator Adjustment • 5. Sampling Oscillator Adjustment Assembly Adjusted A15 RF Assembly Related Performance Test There is no related performance test for this adjustment procedure. Description The phase detector bias is adjusted for 1.8 V dc. The sampling oscillator tank circuit is adjusted for a tuning voltage of 0.9 V dc when the oscillator is set to 288 MHz.
Page 63 Digital Voltmeter ........
Page 64 8. Connect the negative DVM test lead to A15J400 pin 6, and the positive DVM test lead to A15J400 pin 1. 9. Press and set the HP 8563A center frequency to 511 MHz. This sets the [FREQUENCY] sampling oscillator to 288 MHz.
Page 65 22. Remove any existing shorts from the exposed center-conductor of coaxial resonator Z200 to the ground plane. 23. Set the HP 6114A Power Supply for a 21 V dc output ::1:0.2 V. Connect the positive supply lead to X201 pin 1 and the negative supply lead to X201 pin 4.
Page 66: Sampling Adjustments
5. Sampling Oscillator Adjustment Table 2-11. Sampling Adjustments • Center Sampling Displayed Voltage (V de) Frequene OscillatOi (MHz) (MHz) 1st Trial 2nd Trial 3rd Trial 4th Trial 5th Trial • • Adjustment Procedures 2-31...
Page 67: Yto Adjustment
DO 00 DODO 0000 A15 RF Figure 2-8. YTO Adjustment Setup Equipment Microwave Frequency Counter HP 5343A Option 001 Adapters Type N (m) to BNC (f) 1250-1476 Type N (f) to APC 3.5 (f) (Option 026 only) 1250-1745 APC 3.5 (f) to APC 3.5 (f)
Page 68 [LINE) 3. Move the jumper on A14J23 from the NORM position (pins 1 and 2 jumpered) to the TEST position (pins 2 and 3 jumpered). 4. On the HP 8563A, press the following keys: '[~[t'li!~!gi~!iJ [ AUX CTRL) [EXTERNAL MIXER)
Page 69 6. YTO Adjustment 14. Adjust A14R76 FM SPAN until the 300 MHz CAL OUTPUT SIGNAL is aligned with the center vertical graticule line. • • • 2.34 Adjustment Procedures...
Page 70: 7. 1St Lo Distribution Amplifier Adjustment
Adapters Type N (f) to APC (m) 1250-1750 Procedure 1. Set the HP 8563A switch off and disconnect the line cord. Remove the cover and (LINE) fold down the A15 RF and A14 Frequency Control assemblies. Reconnect the line cord.
Page 71 6. Adjust A14R628 GATE BIAS for a DVM reading within 5% of the GATE BIAS voltage printed on the A7 LO Distribution Amplifier label. 7. Zero and calibrate the HP 8902A/HP 8485A in LOG mode (power levels read in dBm). Enter the power sensor 1 GHz Cal Factor into the HP 8902A.
Page 72: Dual Band Mixer Bias Adjustment
10 mV resolution. 2. Copy the bias voltages printed on the A8 Dual Band Mixer label into Table 2-12. 3. On the HP 8563A, place the WR PROTfWR ENA jumper on the A2 Controller assembly t~i~m{j"~~:!iG in the WR ENA position. Press...
Page 73: A8 Bias Voltage
10. Adjust the DAC value, using only the front-panel knob or keypad, for a DVM reading within 50 mV of the Band 4 mixer bias voltage listed in Table 2-12. 11. On the HP 8563A, press 12. Place the WR PROT /WR ENA jumper on the A2 Controller assembly to the WR PROT •...
Page 74: Frequency Response Adjustment
9. Frequency Response Adjustment • 9. Frequency Response Adjustment Assembly Adjusted A15 RF Assembly Related Performance Test Displayed Average Noise Level Frequency Response Description A signal of the same known amplitude is applied to the spectrum analyzer at several different frequencies.
Page 75 HP 8563A display. Adjust the HP 8340A/B POWER LEVEL for a -10 dBm reading on the HP 8902A. 9. On the HP 8563A, adjust the RF Gain DAC value using the front-panel knob or keypad until the marker reads -10 dBm ~0.1O dB.
Page 76 18. On the HP 8563A, press . 19. Adjust the HP 8340A/B POWER LEVEL for a -10 dBm reading on the HP 8902A. 20. On the HP 8563A, adjust the RF gain DAC value using the knob or keypad until the marker reads -10 dBm :1:0.10dB.
Page 77: 10. Calibrator Amplitude Adjustment
The HP 8563A should be allowed to warm up for at least 30 minutes before • performing this adjustment . 1. Place the HP 8563A in the service position shown in Figure 2-12. Prop the A14 Frequency Control Board assembly in the service position. 2. Zero and calibrate the HP 8902AfHP 8482A combination in log display mode.
Page 78 10. Calibrator Amplitude Adjustment • 4. Adjust A15R561 CAL AMPTD for a -10.00 dBm reading on the HP 8902A display. • • Adjustment Procedures 2-43...
Page 79: 11. 10 Mhz Reference Adjustment-Ocxo
• 11. 10 MHz Reference Adjustment-OCXO Assembly Adjusted A21 OCXO Assembly Replacement oscillators are factory adjusted after a complete warmup and Note after the specified aging rate has been achieved. Thus, readjustment should typically not be necessary after oscillator replacement and is generally not recommended.
Page 80: 10 Mhz Reference Adjustment Setup And Adjustment Location
Figure 10 MHz Reference Adjustment Setup and Adjustment Location Equipment Frequency Counter HP 5334A/B Frequency Standard HP 5061B Cesium Beam Standard (or any 10 MHz frequency standard <:H with aging rate per day) Cable BNC, 122 cm (2 HP 10503A required) .
Page 81 INPUT A signal and 10.0 MHz with a displayed resolution of 0.010 Hz (10 mHz). 5. Locate the FREQ ADJ control on the HP 8563A. This control is accessible through the center deck of the spectrum analyzer. See Figure 2-13.
Page 82: Mhz Reference Adjustment-Tcxo (Option 103 Only)
BNC, 122 cm (48 in) HP 10503A Procedure Allow the HP 8563A to warm up for at least 30 minutes before performing Note this adjustment. 1. Connect the equipment as shown in Figure 2-14. Prop up the A14 Frequency Control assembly .
Page 83 12. 10 MHz Reference Adjustment-TCXO (Option only) • 2. Set the 5343A controls as follows: SAMPLE RATE Midrange 50n-1 Mn SWITCH 10 Hz-500 MHz/500 MHz-26.5 GHz SWITCH 10 Hz-500 MHz lmlIIIJJD'. 3. Press Verify that the 10 MHz reference is set to {AUX CTRL ..
Page 84: 13. Demodulator Adjustment
\::::!) OUTPUT ADAPTER ADAPTER TYPE N CABLE Figure 2-15. Demodulator Adjustment Setup Equipment AMfFM Signal Generator HP 8640B Oscilloscope 1980AfB Adapters Type N (m) to BNC (f) (2 1250-1476 required) Type N (f) to APC 3.5 (f) (Option 026 only) 1250-1745 •...
Page 85 (UNE) illustrated in Figure 2-15. Disconnect W28 from A4J5. 2. Connect the test cable from the oscilloscope Channel 1 input to A4J5. Set the HP 8563A switch on. Connect the HP 8640B RF OUTPUT to the HP 8563A INPUT 50n.
Page 86 " This adjustment method may give broader and less accurate results than when using the oscilloscope to peak the response. 11. Set the HP 8563A switch to off. Disconnect the test cable from A4J5 and reconnect {LINE] W28 to A4J5 .
Page 87: 14. External Mixer Bias Adjustment
There are no related performance tests for this adjustment procedure. Description A voltmeter is connected to the HP 8563A IF INPUT with the external mixer bias set to off. The bias is adjusted for a 0 V dc output. SPECTRUM...
Page 88 14. External Mixer Bias Adjustment 4. Adjust A15R926 EXT BIAS ZERO for a DVM reading of 0.000 V de :f:12.5 mY . • • • Adjustment Procedures 2-53...
Page 89: 15. External Mixer Amplitude Adjustment
50 MHz Reference Attenuator ........
Page 90: Conversion Loss Data
Use the analyzer front-panel keys to set the conversion loss value to 30 dB. c. Repeat steps a and b for all frequencies having a conversion loss value other than 30 7. Press on the HP 8340AJB and set the controls as follows: [INSTR PRESET) 310.7 MHz...
Page 91 12. Wait until the message ADJUSTMENT-DONE appears in the active function block and press 13. Use the HP 8563A front-panel knob, step keys, or keypad to change the amplitude of the displayed signal until the marker reads 0 dBm :t:0.17 dB. 14. Press and •...
Page 92: 16. Second If Gain Adjustment
16. Second IF Gain Adjustment • 16. Second IF Gain Adjustment Assembly Adjusted A15 RF Assembly Related Performance Test IF Input Amplitude Accuracy Description The gain of the Second IF (between A15J801 INT Second IF and the third mixer) is set to 12 dB.
Page 93 Equipment No test equipment or test setup is required for this adjustment procedure. Procedure 1. Set the HP 8563A switch off, disconnect the power cord, and remove the analyzer (LINE) cover. Fold. down the A15 RF and A14 Frequency Control assemblies. Prop up the A14 Frequency Control assembly.
Page 94: A15U802 Values
16. Second IF Gain Adjustment 3. Read the gain printed on the A15A1 Second IF Amplifier label. Select a value for A15U802 • from Table 2-14 based upon the gain of the Second IF Amplifier. 4. Reinstall the shield on the A15 assembly. 5.
Page 95: Sig Ill Oscillator Adjustment
0000 DO DD A15 RF 'A15J601 TEST CABLE Figure 2-19. Signal 10 Oscillator Adjustment Setup Equipment Microwave Frequency Counter HP 5343A Spectrum Analyzer HP 8566A/B Adapters • Type N (m) to BNC (f) required) 1250-1476 BNC Tee (f, m, f)
Page 96 MHz/500 MHz-26.5 GHz SWITCH 10 Hz-500 7. If no signal is displayed on the HP 8566A/B, adjust A15C629 SIG ID until a signal is displayed. If the 298 MHz SIG ID oscillator is severely mistuned, it might be necessary to Note widen the span on the HP 8566A/B to see the shifted sweep.
Page 97 F 3 dB HIGH. dB HIGH 10. Observe the HP 8566A/B display as you adjust A15C629 SIG ID for the lowest obtainable frequency with less than 3 dB decrease in amplitude from maximum. Record the frequency counter reading as F 3 dB LOW.
Page 98: 18. Ytf Adjustment
18. YTF Adjustment • 18. YTF Adjustment Assembly Adjusted A14 Frequency Control Assembly Related Performance Test Image, Multiple, and Out-of-Band Responses Second Harmonic Distortion Frequency Response Description The slope and offset of the A12 YTF tuning voltage are set by DACs on the A14 Frequency Control assembly.
Page 99 5.8 GHz POWER LEVEL -10 dBm FREQUENCY STANDARD Switch (rear panel) 6. Press on the HP 8563A. Use the front-panel knob to peak the displayed (PRESEL OFFSET) trace. Record the offset value below: Offset at 5.8 GHz • 7. Set the HP 8563A center frequency and the HP 8340A (cw) to 19.2 GHz.
Page 100 18. YTF Adjustment iiil! i • • 16. Set the HP 8563A and the HP 8340A (cw) to 20 GHz. • )ig~~gti~pg"', 17. Press then . Press (CAL ffi, if necessary, until is di~pl~y~d: OFFSET FOR BAND #4 18. Use the data entry knob to peak the displayed trace.
Page 101: Assembly Replacement
• Assembly Replacement This chapter describes the removal and replacement of all major assemblies. The following replacement procedures are provided: Assembly Page 1. Analyzer Cover Assembly 2. Al Front Frame/ Al8 CRT 3. AlAI Keyboard Assembly/Front Panel Keys 3-12 4. A1A2 RPG 3-14 5.
Page 102: Access To Internal Assemblies
• Access to Internal Assemblies Servicing the HP 8563A requires the removing the spectrum analyzer cover assembly and folding down six board assemblies. Four of these assemblies lay flat along the top of the analyzer and two lay flat along the bottom of the analyzer. All six assemblies are attached to the analyzer right-side frame with hinges.
Page 103: Procedure 1. Analyzer Cover Assembly
2. Tighten the four screws gradually to ensure that the cover is evenly seated in the front-frame gasket groove. 4. Torque each screw to a recommended 40 or 50 inch-pounds. • • 00000 0000 0000 0000 0000 0000 0000 0000 aaaa 00'00 Figure 3-1. HP 8563A Hinged Assemblies • Assembly Replacement...
Page 104: Procedure 2. A1 Front Frame/A18 Crt
• Procedure 2. A1 Front Frame/A18 CRT Removal Warning To protect you from possible contact with high voltages, disconnect the analyzer ac power cord before beginning this procedure. 1. Remove the analyzer cover assembly as described in Procedure 1. 2. Place the analyzer on its right-side frame. 3.
Page 105 Procedure 2. A1 Front Frame/A18 CRT The board assemblies are attached with two hinges to the analyzer right-side Caution • • frame. Always fold out the A14 and A15 assemblies as a unit, not individually. Folding out one assembly at a time binds the hinges attaching the assemblies, and can damage an assembly or its hinge.
Page 106 Procedure 2. A 1 Front Framel A 18 CRT • Warning The voltage potential at A6A1W3 is +9 kV. Disconnect the analyzer ac power cord before performing this procedure. Failure to discharge A6A 1W3 correctly can result in severe electrical shock to personnel and damage to the instrument.
Page 107: A9, A18, And Line-Switch Assembly Mounting Screws
Procedure 2. A1 Front Frame/A18 CRT • • Figure 3-3. A9, A18, and Line-Switch Assembly Mounting Screws 14. Remove the screw (2) securing the A9 Input Attenuator assembly to the center support on the front frame. See Figure 3-3. 15. Use a 5/16-inch open-end wrench to disconnect W41 from the front-panel INPUT 50n connector.
Page 108: Front-Frame Mounting Screws
Procedure 2. A1 Front Frame/A18 CRT • 21. Gently remove the line-switch assembly, using caution to avoid damaging A1W1 and the power indicator LED A1W1DS1. 22. Remove A1W1 and A1W1DS1 from the line switch assembly. 23. Remove the three screws (1) securing the front frame to the analyzer right-side frame. See Figure 3-4.
Page 109 Use care when handling the glass. CRT EM! shield. Clean the glass using Note thin-film cleaner (HP part number 8500-2163) and a. lint-free cloth. When installing the glass shield, face the side of the glass with the silver coated edge toward the inside of the analyzer.
Page 110 Procedure 2. A1 Front Frame/A18 CRT • A1A1W1 • Figure 3-6. Placing the CRT into the Front Frame 5. Connect A18Wl to A17J5. 6. Snap CRT cable W9 onto the end of the CRT assembly. 7. Fully seat the front frame and CRT assemblies into the analyzer. 8.
Page 111 Procedure 2. A1 Front Frame/A18 CRT 15. Use a 5/16-inch wrench to connect W41 from the A9 Input Attenuator to the front-panel • INPUT 50n connector. Make sure that W40, W36, and A1W1 are routed between W41 and the attenuator bracket. Secure the A9 Input Attenuator bracket to the center support on the front-frame using one panhead screw (2) (in Figure 3-3).
Page 112: Procedure 3. A1A1 Keyboard/Front Panel Keys
• Procedure 3. A 1A1 Keyboard;Front Panel Keys Removal 1. Remove the front frame from the analyzer as described in Procedure 2. 2. Place the front frame face-down on the work bench and remove the front frame center support. 3. Disconnect Al WI from AIA1J3 and the RPG cable from AIA1J2. 4.
Page 113: Key Positions As Viewed From Inside
Procedure 3. A 1A 1 KeyboardfFront Panel Keys • • • • • • [CONF IC) [PRESETI CTRL • • • • [;[) [:ECALL) (MODULEI [FREQUENCY) • • • • • • SPAN ( SWEEP) [ MKR-» • • • •...
Page 114: Procedure 4. A1A2 Rpg (Rotary Pulse Generator)
• Procedure 4. A 1A2 RPG (Rotary Pulse Generator) Removal 1. Remove the A9 Input Attenuator described in Procedure 8. 2. Disconnect the RPG cable from the AlAI keyboard assembly. 3. Remove the front-panel RPG knob using a #6 hex (allen) wrench. Use a 7/16-inch nut driver to remove.
Page 115: Procedure 5. A2, A3, A4, And A5 Assemblies
Procedure 5. A2, A3, A4, and A5 Assemblies Procedure 5. A2, A3, A4, and AS Assemblies • Removal 1. Remove the analyzer cover assembly as described in Procedure 1. 2. Place the analyzer on its right-side frame. 3. Remove the eight screws holding the A2, A3, A4, and A5 assemblies to the top of the analyzer.
Page 116 Procedure 5. A2, A3, A4, and AS Assemblies • • Figure 3-8. A2, A3, A4, and AS Assembly Removal Replacement 1. Place the analyzer top-side-up on the work bench. 2. Attach the assembly being installed to the chassis hinges with two panhead screws. 3.
Page 117: Assembly Cables
Procedure 5. A2, A3, A4, and A5 Assemblies • BLUE GREEN A 11W1 YELLOW WHITE/ORANGE A3W1 BLUE COMPONENT SIDE BLACK A19W1 BROWN ORANGE • BROWN WHITE/BLUE Figure 3-9. Assembly Cables (1 of 2) • Assembly Replacement 3-17...
Page 118 Procedure 5. A2, A3, A4, and A5 Assemblies • VIOLET WHITE ORANGE Assembly Cables (2 of 2) • • 3-18 Assembly Replacement...
Page 119: Coaxial Cable Clip
The standoffs on the AS assembly must fit into the cups on the A6 Power Supply top shield. 8. Fold the A2 and A3 assemblies together as a unit into the analyzer. Be sure to fold HP-IB cable A19Wl between the A3 and A4 assemblies, using the two sets of hook and loop (velcro) fasteners.
Page 120 Procedure 5. A2, A3, A4, and A5 Assemblies • 11. Secure the assemblies using the eight screws removed in "Removal," step 3. Place a flat washer on each screw. A1A1W1 A3J602 • A19W1 Figure 3-11. HP..IB and A1A1 W1 Cable Placement • 3-20 Assembly Replacement...
Page 121: Procedure 6. A6 Power Supply
Procedure 6. A6 Power Supply • Procedure 6. A6 Power Supply Removal Warning The A6 Power Supply and A6A 1 High Voltage assemblies contain lethal voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the ac power cord from the instrument before beginning this procedure.
Page 122: A6 Power Supply Connections
Procedure 6. A6 Power Supply • Replacement 1. Attach the A6 Power Supply assembly to the analyzer chassis usin,gthe three standoff screws. 2. Connect WI to A6Jl, W3 to A6J2, fan power wires to A6J3, W8 to A6J4, and the line-power connector to A6JI01.
Page 123: A6 Power Supply Cover
Procedure 6. A6 Power Supply • • Figure 3-13. A6 Power Supply Cover • Assembly Replacement 3-23...
Page 124: Procedure 7. A6A1 Idgh Voltage Assembly
• Procedure 7. A6A 1 High Voltage Assembly Removal Warning The A6 Power Supply and A6A 1 High Voltage assemblies contain lethal voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the ac power cord from the instrument before beginning this procedure.
Page 125: A17 Crt Driver Mounting Screws
Procedure 7. A6A1 High Voltage Assembly 14. Remove the two screws (1) securing two board-mounting posts to the left-side frame and • remove the posts. See Figure 3-14. 15. Remove the two left-side frame screws (2) securing the A16 and A17 assemblies. 16.
Page 126: A16 Cable Routing
Procedure 7. A6A 1 High Voltage Assembly 9. Secure the A16 and A17 assemblies with two flathead screws. See (2) on Figure 3-14. • 10. Connect the two mounting posts to the left-side frame using two screws (1) (in Figure 3-14). 11.
Page 127: Procedure 8. A7 Through A13 Assemblies
Procedure 8. A7 through A13 Assemblies Procedure 8. A7 through A 13 Assemblies • A separate replacement procedure is supplied for each assembly listed below. A7 First LO Distribution Amplifier A8 Low Band Mixer A9 Input Attenuator AlO YTF All YTO A12 RF Switch A13 Second Converter Before beginning a procedure, do the following:...
Page 128: Assembly Locations
Procedure 8. A7 through A13 Assemblies • • A 11 Figure 3-16. Assembly Locations • 3-28 Assembly Replacement...
Page 129 Procedure 8. A7 through A13 Assemblies • GATE BIAS WHITE/VIOLET(97) BLACK(O) TUNE + V IOLET( 7) WHITE/BLACK/ BROWN(901) MXR BIAS GREY(8) TUNE - BROWN( 1) • ORANGE(3) RED(2) Figure 3-17. RF Section Bias Connections • Assembly Replacement 3-29...
Page 130: Procedure 830.A7 1St Lo Distribution Amplifier
• Procedure Sa. A7 1st LO Distribution Amplifier Removal 1. Remove the two screws securing the assembly to the analyzer center deck. 2. Use a 5/16-inch wrench to disconnect W38 and W39 at A7J1 and J2. 3. Disconnect W42 at the front-panel 1ST LO OUTPUT connector. Loosen W42 at A7J3. 4.
Page 131: Procedure 8B. A8 Dual Band Mixer
Procedure 8b. A8 Dual Band Mixer Procedure 8b. AS Dual Band Mixer • Removal 1. Disconnect W34 at A15A2Jl, and place the analyzer upside-down on the work bench with A14 and A15 folded out to the left. 2. Remove wire, color code 7, from the A8 PIN SW connection and wire, color code 8, from the A8 MXR BIAS connection.
Page 132: Procedure 8C. A9 Input Attenuator
• Procedure 8c. A9 Input Attenuator Removal 1. Disconnect W34 at A15A2J1, and place the analyzer upside-down on the work bench. 2. Remove W41 and W43. 3. Remove the screw (1) securing the attenuator to the front-frame center support. See Figure 3-17.
Page 133: Procedure 8D. A10 Ytf
Procedure ad. A10 YTF Procedure 8d. A 10 YTF • Removal 1. Use a 5/l6-inch wrench to remove W46. 2. Remove FL2 and disconnect W38 at the All assembly. 3. Disconnect the four bias wires connected to the AID assembly. 4.
Page 134: Procedure 8E. All Yto
Procedure 8d. A10 YTF • Procedure Se. A 11 YTO Removal 1. Use a. 5/16-inch wrench to remove W46. 2. Remove FL2 a.nd disconnect W38 at the All assembly. 3. Disconnect W44 at A12 RF Switch. 4. Tilt the analyzer onto its right-side frame to allow access to the four All mounting screws (2) (in Figure 3-19).
Page 135: Procedure 8F. A12 Rf Switch
Procedure 8f. A12 RF Switch Procedure 8f. A 12 RF Switch • Removal 1. Disconnect W34 from A15A2Jl and place the analyzer upside-down on the work bench. 2. Use a 5/16-inch wrench to remove W46 and W43. Disconnect W44 from the A12 assembly. 3.
Page 136 GREEN • Figure 3-21. A12 Wiring Diagram 2. For standard HP 8563A analyzers, refer to Figure 3-21 and solder the control wires to the A12 assembly as follows: Blue wire to A12 -1 terminal. Yellow wire to A12 +2 terminal.
Page 137 Procedure 8f. A12 RF Switch 4. Mount the A12 assembly to the analyzer right-side frame using two flathead screws (2). • See Figure 3-18. Use caution to avoid damaging any cables. 5. Connect W44 to A12J2. Install W43 from the A9 Input Attenuator to A12J3. 6.
Page 138: Procedure 8G. A13 Second Converter
• Procedure 8g. A 13 Second Converter Turn off the analyzer power when replacing the A13 Second Converter Caution • assembly. Failure to turn off the power may result in damage to the assembly. Removal 1. Disconnect W34 at AI5A2Jl, and place the analyzer upside-down on the work bench. 2.
Page 139: Procedure 9. A14 Frequency Control And A15 Rf Assemblies
Procedure 9. A14 Frequency Control and A15 RF Assemblies • Procedure 9. A 14 Frequency Control and A 15 RF Assemblies Removal 1. Remove the analyzer cover as described in Procedure 1. 2. Place the analyzer on its right-side frame. These washers are not captive.
Page 140 Procedure 9. A 14 Frequency Control and A 15 RF Assemblies Caution • Always fold the A14 and A15 assemblies as a unit, not individually. Folding out one assembly at a time binds the hinges attaching the assemblies and can damage an assembly or its hinge.
Page 141 Procedure 9. A14 Frequency Control and A15 RF Assemblies • IImIIIIIIIl COIoI'ONENT S I DE • (OPT ION 001) Figure 3-23. A14 and A15 Assembly Cables • Assembly Replacement 3-41...
Page 142: Procedure 10. A16 Cal Oscillator/ A17 Crt Driver
• Procedure 10. A 16 CAL Oscillator/A 17 CRT Driver Removal 1. Remove the analyzer cover assembly and fold out the A2, A3, A4, and A5 assemblies. Do not fold the A2, A3, A4, and A5 board assemblies out of the analyzer one Caution •...
Page 143 Procedure 10. A16 CAL Oscillator/A17 CRT Driver Replacement • 1. Connect W7, W8, W9, A6AIW2, and AI8WI to the AI7 CRT Driver assembly. Place the assembly into the center-deck mounting slot next to the CRT assembly. 2. Connect all AI6 assembly cables as illustrated in Figure 3-25, which shows the left-side frame removed in order to view proper AI6 assembly cable routing.
Page 144: Procedure 11. B1 Fan
• Procedure 11. B1 Fan RemovaljReplacement Warning Always disconnect the ac power cord from the instrument before beginning this procedure. Failure to follow this precaution can result in a shock hazard to personal. 1. Remove the four screws securing the fan assembly to the rear frame. 2.
Page 145: Procedure 12. Btl Battery
Procedure 12. BT1 Battery • Procedure 12. BT1 Battery Warning Battery BT1 contains lithiumiodide. Do not incinerate or puncture this battery. Dispose of the discharged battery in a safe manner. To avoid loss of the calibration constants stored on the A2 Controller Caution •...
Page 146: Procedure 13. Rear Frame/Rear Dress Panel
5. Fold both the A4 and A5 assemblies out of the analyzer as a unit. • 6. Disconnect the HP-IB cable at A2J5. 7. Place the analyzer top-side-up on the work bench with A2, A3, A4, and A5 folded out to the right.
Page 147 Procedure 13. Rear Frame/Rear Dress Panel 13. Disconnect the two cable ties holding ribbon cable W7 to the A19 HP-m assembly. • 14. Remove four screws (1) securing the rear frame to the main deck. See Figure 3-26. 15. Remove the six screws securing the rear frame to the left- and right-side frames.
Page 148 Replace the battery. 9. Secure the battery assembly to the rear frame, using two flathead screws. 10. Reconnect the two cable ties on the A19 HP-m assembly to hold ribbon cable W7 to the A19 assembly. 11. Connect the fan and line-power cables to A6J3 and A6JI0l on the A6 Power Supply.
Page 149 Procedure 13. Rear FramefRear Dress Panel • • Figure 3-27. A6 Power-Supply Cover • Assembly Replacement 3-49...
Page 150: Procedure 14. W3 Line Switch Cable
• Procedure 14. W3 Line Switch Cable Removal Warning Due to possible contact with high voltages, disconnect the analyzer ac power cord before beginning this procedure. 1. Remove the analyzer cover assembly as described in Procedure 1. 2. Remove the eight screws holding the A2, A3, A4, and A5 assemblies to the top of the analyzer.
Page 151 Procedure 14. W3 line Switch Cable Always fold the A14 and A15 assemblies out as one unit, not individually. Caution • Folding out one assembly at a time binds the hinges attaching the assemblies and can damage an assembly or its hinge. 15.
Page 152 18 and 19. Otherwise, skip to step 20. 18. From the top side of the analyzer, use contact removal tool, HP part number 8710-1791, to remove the four wires from the W3 connector. See Figure 3-30. With wire cutters, clip the tie wrap holding the cable to the contact housing.
Page 153 Procedure 14. W3 Line Switch Cable 20. Remove the Al Front Frame assembly and A18 CRT assembly as described in Procedure • 2, "Removal," steps 10 through 23. 21. Remove the left side frame from the analyzer using the hardware listed below. (The side frame remains attached by the speaker wires.
Page 154 Figure 3-30. W3 Cable Connector Replacement (Using Contact Removal Tool, HP part number 8710-1791) 1. Ensure that the action of the switch is working properly. With a pair of wire cutters, clip the tie wrap holding the cable to the contact housing of the W3 replacement assembly.
Page 155 Procedure 14. W3 Line Switch Cable 3. From the bottom side of the analyzer, insert the contact end of W3 through the slotted • opening in the main deck. W3 should come through to the top side of the analyzer between the A18 CRT assembly and the post-accelerator cable.
Page 156 Procedure 14. W3 Line Switch Cable 6. Attach the line-switch assembly to the front-frame using the captive panhead screw. Be sure to secure the line-switch grounding lug with the screw. • <:9 c::::::J c::::::J <B <B [::=J <:9 c:::=J c=:::=J ==::J <:9 <B 'I <B...
Page 157: Procedure 15. Eerom (A2U501)
Procedure 15. EEROM (A2U501) Procedure 15. EEROM (A2U501) • RemovaljReplacement Note The EEROM is replaced with the power on. Use a nonmetallic tool to remove • the defective EEROM and install the new EEROM . 1. Turn the analyzer switch off. Remove the analyzer cover assembly and fold out the (LINE) A2, A3, A4, and A5 assemblies.
Page 158 Procedure 15. EEROM (A2U501) 16. Fold the A2 and A3 assemblies into the analyzer as described in Procedure 5. Secure the • analyzer cover assembly. • • 3-58 Assembly Replacement...
Page 159: Procedure 16. A21 Ocxo
Procedure 16. A21 OCXO Procedure 16. A21 OCXO • Removal 1. Remove the rear-frame assembly as described in Procedure 13. 2. Place the analyzer on its right-side frame. 3. Fold out the A14 and A15 assemblies. Always fold the A14 and A15 assemblies out as one unit, not individually. Caution •...
Page 160 Procedure 16. A21 OCXO • • Figure 3-32. A21 OCXO Mounting Screws Replacement 1. Connect W49, coax 82, and W50 to the OCXO and position the OCXO in the analyzer. 2. Secure the OCXO to the analyzer main deck using three screws (1). See Figure 3-32. 3.
Page 161: Replaceable Parts
California . • No maximum or minimum on any mail order (there is a minimum order amount for parts ordered through a local HP office when the orders require billing and invoicing) . • Prepaid transportation (there is a small handling charge for each order) .
Page 162: Direct Phone-Order System
• Direct Phone-Order System Within the USA, a phone order system is available for regular and hotline replacement parts service. A toll-free phone number is available, and Mastercard and Visa are accepted. Regular Orders: The toll-free phone number, (800) 227-8164, is available 6 AM to 5 PM, Pacific time, Monday through Friday.
Page 163 • Table 4-2. Reference Designations, Abbreviations and Multipliers (1 of 4) REFERENCE DESIGNATIONS Assembly Fuse Thermistor Attenuator, Isolator, Filter Switch Limiter, Termination Circulator Transformer Fan, Motor Electrical Connector Terminal Board Battery (Stationary Portion), Thermocouple Capacitor Jack Test Point Coupler Relay Integrated Circuit, Diode, Diode Coil, Inductor...
Page 164 • Table 4-2. Reference Designations, Abbreviations, and Multipliers (2 of 4) ABBREVIATIONS DAP-GL Diallyl Phthalate Current Gain JFET Junction Field Glass Bandwidth Product Effect Transistor Double (Transition DCDR Decoder Frequency), Feet, Degree Foot D-HOLE D-Shaped Hole Fixed Kelvin, Key, Diameter Kilo, Potassium Dual In-Line Package KNRLD Knurled...
Page 165 • Table 4-2. Reference Designations, Abbreviations, and Multipliers (3 of 4) ABBREVIATIONS PLSTC Plastic Subminiature, Panel A Type (Threaded Nano, None Positive Negative Connector) N-CHAN N-Channel Positive (Transistor) Subminiature, Nanohenry POLYC Poly carbonate B Type (Slip-on Nanometer, POLYE Polyester Connector) Nonmetallic Potentiometer Submi niature,...
Page 166 • Table 4-2. Reference Designations, Abbreviations, and Multipliers (4 of 4) ABBREVIATIONS Variable Volts-Direct Current Microcandela Yttrium-Iron- Microfarad Garnet Microhenry Microliter, Underwriters' Watt, Wattage, Laboratories, Inc. White, Wide, Width UNHDND Unhardened W /SW With Switch ZNR Zener Wire Wound Variable, Violet, Volt, Voltage By (Used with Vacuum, Volts-...
Page 167 • Table 4-3. Manufacturers Code List (1 of 3) Manufacturer Name Address Mfr. Code STOCKHOLM C0633 RIFAAB SALZBURG C1433 AB ELEKTRONICK GMBH STUTTGART D8350 GROSS A RIETHEIM D8351 MARQUARDT GMBH LANDSHUT D8439 ROEDERSTEIN /RESISTA GMBH DEVON K7253 STC/STANTEL HOLSWORTHY K8479 HOLSWORTHY ELECTRONICS LTD MTNVIEW S0545 NEC ELECTRONICS TOKYO...
Page 168 ANALOG DEVICE INC NV PHILIPS ELCOMA EINDHOVEN 25403 NATIONAL SEMICONDUCTOR CORP SANTA CLARA CA US 27014 28480 HP DIV 01 SAN JOSE COMPONENTS SAN JOSE • STORM PRODUCTS CO LOS ANGELES 29005 30043 SOLID STATE DEVICES INC LA MIRADA NEW YORK...
Page 169 Table 4-3. Manufacturers Code List (3 of 3) • Manufacturer Name Address Mfr. Code PA US 6E259 AMETEKINC PAOLI 70276 ALLENMFGCO HARTFORD 71744 GENERAL INSTRUMENT CORP CLIFTON 71984 DOW CORNING CORP MIDLAND CONTINENTAL SCREW CO DIY OF AMCA BEDFORD 72228 73138 BECKMAN INDUSTRIAL CORP FULLERTON...
Page 170: Replaceable Parts
• Table 4-4. Replaceable Parts (1 of 8) HP Part C Qty Description Mfr Part Desia: Number Code Number ACCESSORIES SUPPLIED SUN HOOD 28480 5180-9055 5180-9055 0 TERMINATION-COAXIAL SMAj 0.5Wj 50n 1810-0118 1 16179 2003-6113-02 1250-0780 5 ADAPTER-COAX F-BNC M-N...
Page 171 • Table 4-4. Replaceable Parts (2 of 8) C Qty Description HP Part Mfr Part Desig Number Code Number SCREW-MACH M3.5 x 0.6 6MM-LG 0515-0889 6 28480 0515-0889 0515-1241 6 SCREW-MACH M5 x 0.8 12MM-LG PAN-HD 28480 0515-1241 0515-1331 5...
Page 172 • Table 4-4. Replaceable Parts (3 of 8) C Qty Description Mfr Part Ref' UP Part Number Code Desie: Number MAJOR ASSEMBLIES 28480 08561-60016 08561-60016 FRONT FRAME ASSEMBLY (AI assembly includes the front frame, front faceplate, front-panel keys, and other hardware. Figure 4-5 lists the individual part numbers.) AlAI See Table A-I...
Page 173 ALIGN (P A18MP1, A17J5 to A18Ll) 28480 See Table A- 1 HP-IB ASSEMBLY See Table A-I • 28480 5061-9031 CABLE ASSEMBLY, RIBBON, HP-IB 5061-9031 A19W1 (A2J5 to Rear Panel J2) BATTERY ASSY (Includes W6, BTl) 28480 5062-0797 5062-0797 28480 1813-0644 OCXO 10.0 MHz (Not in Opt.
Page 174 • Table 4-4. Replaceable Parts (5 of 8) HP Part C Qty Description Mfr Part Number Code Number Desilt ASSEMBLY SHIELDS A3 Assembly 5021-6723 7 PEAK DETECTOR (TOP) 28480 5021-6723 5021-6724 8 PEAK DETECTOR (BOTTOM) 28480 5021-6723 0515-2080 8 SCREW CPT M2.5 14L...
Page 175 • Table 4-4. Replaceable Parts (6 of 8) C Qty HP Part Description Mfr Part Number Code Number DesiR: CABLE ASSEMBLIES POWER CABLE, RIBBON 28480 5061-9024 5061-9024 5061-9025 CONTROL CABLE, RIBBON 28480 5061-9025 CABLE ASSEMBLY LINE SWITCH 5062-0728 28480 5062-0728...
Page 176 • Table 4-4. Replaceable Parts (7 of 8) UP Part C Qty Description Mtr Part Desig Number Code Number 5062-0708 2 CABLE ASSEMBLY, COAX 84, 28480 5086-0708 10 MHz REF-2, (A15J304 to AI6JI) 5062-0721 8 CABLE ASSEMBLY, COAX 97, LO SWEEP 28480 5062-0721 0.5 V/GHz (A14J7 to Rear Panel J8) 5062-0723 1...
Page 177 • Table 4-4. Replaceable Parts (8 of 8) UP Part C Qty Description Mfr Part Desig Number Code Number 5062-0710 CABLE ASSEMBLY, COAX 92, INT 2ND IF 28480 5062-0710 (A13J2 to A15J801) 5062-0725 CABLE ASSEMBLY, COAX 86, EXT 2ND IF 28480 5062-0725 (Front Panel J3 to A15J802) 5062-0707...
Page 178 • TOP VIEW BOTTOM V I EW • Item C Qty HP Part Description Mfr Part Number Code Number 0515-1323 5 11 SCREW-MACH M3 0.5 30MM-LG PAN- HD 2848 0515-1323 11 SCREW-MACH M3 0515-1646 5 0.5 60MM-LG PAN- HD 2848 0515-1646...
Page 179 Parts List for Figure Cover Assembly HP Part Mfr Part • Item Description Number Code Number 5041-8911 BAIL HANDLE 28480 5041-8911 5041-8912 TRIM CAP 28480 5041-8912 0515-1114 SCREW MACH M4 X 0.7 10MM-LG PAN-HD 28480 0515-1114 1460-2164 SPRING-CPRSN .845 IN-OD 1.25-IN-OA-LG...
Page 181 Parts List for Figure 4.3 Main Chassis HP Part Mfr Part • Description Item Number Code Number 0515-1079 SCREW-MACH M3 X 0.5 8MM-LG PAN-Ho SEM 28480 0515-1079 5180-9023 SMM 3.0 35 PCPoS 28480 5180-9023 0515-1826 SCREW-MACH M3 X 0.5 35MM-LG PAN-Ho SEM...
Page 183 Parts List for Figure 4-4 Front Deck HP Part Mfr Part • Item Description Number Code Number 0515-0886 SCREW-MACH M3 X 0.5 6MM-LG PAN-HD 28480 0515-0886 0515-1457 SCREW-MACH M3 X 0.5 6MM-LG PAN-HD 28480 0515-1457 0515-0886 SCREW-MACH M3 X 0.5 6MM-LG PAN-HD...
Page 185 Parts List for Figure 4-5 Front Frame HP Part Mfr Part • Item Description Number Code Number 0515-1622 SCREW-SKT-HD-CAP M4 X 0.7 8MM-lG 28480 0515-1622 5041-8906 CRT BEZEL 28480 5041-8906 8160-0270 RFI CRT FACEPLATE PlSTC-MET-CTD AU-Pl 28480 8160-2750 0370-3069 KNOB BASE 1-1/8 JGK .252-IN-ID...
Page 186 Parts List for Figure 4-S Front Frame • HP Part Mfr Part Description Item Number Code Number 5041-3962 KEY "AMPLITUDE" 28480 5041-3962 5041-3995 ACTUATOR SOFTKEY 28480 5041-3995 5041-3956 KEY-BLANK 28480 5041-3956 5041-3955 KEY "UP ARROW" 28480 5041-3955 KEY "DOWN ARROW"...
Page 188 Parts List for Figure 4-6 Rear Frame HP Part Mfr Part Description Item Number Code Number SCREWMACH M3 X 0.5 6MM-LG 90DEG-FLH-HD 28480 0515-0890 0515-0890 5062-0797 BATTERY HOLDER (Includes wires) 28480 5062-0797 SCREW-MACH M4 X 0.7 40MM-LG PAN-HD 28480 0515-1669...
Page 190: Major Assembly And Cable Locations
A12 RF Switch A13 Second Converter A14 Frequency Control 5-1,5-6 A15 RF 5-1, 5-5,5-6 A16 Cal Oscillator A17 CRT Driver A18 CRT Assembly A19 HP-IB A20 Battery Assembly A21 OCXO • B1 Fan BTl Battery Major Assembly and Cable Locations...
Page 191 LSI Speaker Cable Assembly illustrated in Figure AlAI WI Keyboard Cable 5-2, 5-4 A3WI Interface Cable Al9W1 HP-ffi Cable 5-2, 5-4 WI Power Cable 5-2, 5-3, 5-4, 5-5 W2 Control Cable 5-2, 5-3, 5-4, 5-5 W3 Line Switch Cable 5-4, 5-7...
Page 192 Cable Assembly (Continued) illustrated in Figure • W34 First LO Samp. (Coax 0) 5-5, 5-6, 5-7 W35 Int Second IF (Coax 92) 5-5,5-7 W36 Ext Second IF (Coax 86) W37 10 MHz Ref 1 (Coax 85) 5-5,5-6 W38 First LO W39 Dual, Band Mixer W40 Calibrator Out (Coax 89) W41 RF'Input...
Page 193 • • 0000 0000 0000 0000 0000 0000 00 00 0000 0000 Figure 5-1. Hinged Assemblies • • Major Assembly and Cable Locations...
Page 194 • A1A1W1 A3W1 COMPONENT SIDE A19W1 Figure 5-2. Top View (A2 Unfolded) • Major Assembly and Cable Locations...
Page 195 • Figure 5.3. Top View (A2 and A3 Unfolded) • • Major Assembly and Cable Locations...
Page 196 • A19W1 A1A1W1 • A6A1 Figure 5-4. Top View (A2, A3, A4, and A5 Unfolded) Major Assembly and Cable Locations...
Page 197 • Major Assembly and Cable Locations...
Page 198 • A1Al • A 14 Figure 5-6. Bottom View (A14 and A15 Unfolded) • Major Assembly and Cable Locations...
Page 199 • • Figure 5-7. RF Section • 5-10 Major Assembly and Cable Locations...
Page 200 • 8T1/A20 Figure 5-8. Rear View • • Major Assembly and Cable Locations 5-11...
Page 201 • General Troubleshooting Introduction This chapter contains information for troubleshooting the instrument down to one of the six major functional. sections listed below. RF Section Synthesizer Section IF Section ADC /Interface Section Controller Section Display/Power Supply Section Chapters 7 through 12 provide detailed troubleshooting information about each of the functional.
Page 202: Assembly-Level Text
The test jack is a collection of test points located on a 16-pin connector. There are over 26 test jacks used throughout the analyzer. The HP 85629B Test and Adjustment Module uses the analyzer test jacks during diagnostic and adjustment procedures. The pins on the test jack may be manually probed, provided caution is used to prevent accidental shorting between adjacent pins.
Page 203 r------------------ ..------------------------------------- Figure 6-2 illustrates the pin configurations of these five cables. Cables Wl and W2 use two • pin numbering methods on their connectors. These methods are identified on the interconnect and block diagrams by the letters "A" and "B" next to the connector designator, such as Jl(A).
Page 204 • TEST POINTS ON BLOCK DIAGRAM TEST JACK PIN NAME AMPL I F I ER TEST JACK J4-MS8 ~ PIN NUMBER (J4-15) TEST POINTS ON CIRCUIT BOARD ASSEMBLY TP1 (POST) J4 (TEST JACK) • TP3 (EXTENDED COMPONENT LEAD) (PADS) Figure 6-1. Assembly Test Points •...
Page 205 • .:T5V -15V 2 • POWER FOR +15V +15V +15V 4 • +15V +28V CONTROLLER LINE TRIG +28V LINE TRIG 6 • AND INTERFACE 8 • ONLY -+5V +5V- +5V - -+5V • 11 • 13 • 15 A GND •...
Page 206 • REAR PANEL J3 A2J6 LOPT STROBE LOPT STROBE 49 • BC CLOCKI +28V BC CLOCKI 47 • +28V 45 • OPT R;W +15V OPT R/W +15V LRESET +15V LRESET +15V 41 • H OPT IRQ H OPT IRQ LOPT/IO 39 •...
Page 207 • REALIGN CRT ADJ &< PATTERN IF ADJ FREO ON OFF DIAGNOSE ADJ CURR IF STATE FULL IF ADJ REF LVL SERVICE CAL DATA MORE MORE 1 OF 2 2 OF 2 3RD IF CAL 3RD AMP GAIN MIXER EXT MXR REF CAL BIAS pRESEL...
Page 208: Troubleshooting To A Functional Section
Troubleshooting to a Functional Section • Table 6-1 lists the location of assembly-specific troubleshooting information . • If the HP 85629B Test and Adjustment Module (TAM) is available, refer to the "Using the TAM" section in this chapter . • If error messages are displayed, refer to "Error Messages" in this chapter. You can find both error descriptions and brief troubleshooting information .
Page 209 A16 Cal Oscillator Chapter 8. IF Section Chapter 12. Display/Power Supply Section A17 CRT Driver Chapter 12. Display/Power Supply Section A18 CRT Chapter 9. Controller Section A19 HP-IB Chapter 10. Synthesizer Section A210CXO Chapter 11. RF Section FLl,2 • General Troubleshooting...
Page 210: Using The Tam
HP-IB . • The HP 85629B Rev D firmware (Revision 890930 or later) supports the HP 8563A Spectrum Analyzer. The TAM measures voltages at key points in the circuitry and flags a failure whenever the voltage falls outside limits.
Page 211: Tam Requirements
Note The HP 85629A Test and Adjustment Module (all firmware revisions) and the • HP 85629B Test and Adjustment Module with firmware revision A and B do not properly execute Automatic Fault Isolation on the spectrum analyzer. TAM Requirements For the TAM to function properly, certain parts of the analyzer must be operating properly.
Page 212: Erroneous Results
TAM is malfunctioning and should be serviced. Blank Display It is possible to use the TAM Manual Probe Troubleshooting without a display if an HP-IB printer is available. Refer to Chapter 12 for more information. Automatic Fault Isolation Automatic Fault Isolation is designed to isolate most faults to one or two assemblies.
Page 213: Lo Control Check
(with measured and expected voltages/currents) is displayed with a list of additional areas to check. These areas can sometimes be checked by looking at another TAM connector, but usually require manual troubleshooti:I1.gtechniques to isolate the problem further. If an HP-IB printer is connected, press .'2""~ to provide a hard copy of the currently displayed •...
Page 214: Rf Path Fault Isolation
RF path.) An external microwave source with a frequency range of 5 GHz is required. The source is not controlled over HP-IB. The user sets the source to 5 GHz at -10 dBm. (The TAM expects -10 dBm at the input of the spectrum analyzer; the amplitude at the source output may have to be higher to account for cable loss.)
Page 215: Error Messages
Refer to "Viewing Multiple Messages" below. Page Viewing Multiple Messages 6-15 Error Message Elimination 6-16 Remote HP-ill Errors (100 to 150) 6-16 System Errors (200 to 201) 6-17 ADC Errors (250 to 251) 6-17 YTO Loop Errors (300 to 301)
Page 216: Error Message Elimination
101 NO STATE State to be RECALLed not valid or not SAVEd. • 106 ABORTED! Current operation is aborted; HP-ffi parser reset. 107 HELLO ?? No HP-ffi listener is present. 108 TIME OUT Analyzer timed out when acting as controller.
Page 217: System Errors (200 To 201)
NOP IBLK I-block format not valid here. • NOP STRNG Strings are not valid for this command. This command cannot be queried. 126 NO 1 127 BAD DTMD Not a valid peak detector mode. 128 PK WHAT? Not a valid peak search parameter. 129 PRE TERM Premature A-block termination.
Page 218: Yto Loop Errors (300 To 301)
• YTO Loop Errors (300 to 301) These errors often require troubleshooting the A14 Frequency Control assembly (Synthesizer Section) or the ADC circuits. YTO (1st LO) Loop is unlocked. The ADC measures YTO_ERR 300 YTO UNLK voltage under phase-lock condition. ERR 301 is set if the voltage is outside certain limits.
Page 219 306 FREQ ACC Unable to adjust MAINSENSE to 0 volts using the fine adjust DAC. • The coarse adjust and fine adjust DAC are used together to set MAINSENSE to 0 volts with the loop opened. ERR 306 is set if the fine adjust DAC cannot bring MAINSENSE to 0 volts.
Page 220: Yto Loop Errors (317 To 318)
314 FREQ ACC Indicates problems in the span calibration. Troubleshoot any unlocks • before attempting to troubleshoot span calibration problems, because the loops must all lock in order to perform the calibration. If LO spans greater than 1 MHz are correct, check A14U114B , A14U115A, A14U116, or A14Q101.
Page 221: Yto Loop Errors (331)
programmed to a frequency 400 kHz higher. ERR 321 is set if the new • MAINSENSE voltage is not greater than the previous MAINSENSE voltage. 322 FREQ ACC Main roller pretune DAC value set greater than 255. During the LO adjust sequence, the main roller is locked and then programmed to a frequency 1.6 MHz higher.
Page 222: 600 Mhz Reference Loop (333)
• 600 MHz Reference Loop (333) This error requires troubleshooting the A14 Frequency Control assembly (Synthesizer Section) or the ADC circuits. The 600 MHz Reference Oscillator PLL is unlocked. error codes 600 UNLK 302, 303, 304, 327 or 499 are also present, suspect the 10 MHz Reference, the A21 OCXO, or the TCXO on Option 103, or the A15 RF assembly.
Page 223 3. If ERR 581 or ERR 582 appears, the fault is most likely on the A16 Cal oscillator. Refer to • errors 581 and 582. 4. If ERR 581 or ERR 582 does not appear, troubleshoot the A5 IF assembly. Multiple IF Errors During IF adjust: If a FULL IF ADJ sequence (pressing (CAL) ) results in IF errors while displaying...
Page 224 • Unable to adjust amplitude of 100 Hz Resolution Bandwidth. 400 AMPL 100 Unable to adjust amplitude of 300 Hz Resolution Bandwidth. 401 AMPL 300 Unable to adjust amplitude of 1 kHz Resolution Bandwidth. 402 AMPL 1K Unable to adjust amplitude of 3 kHz Resolution Bandwidth. 403 AMPL 3K Unable to adjust amplitude of 10 kHz Resolution Bandwidth.
Page 225 300 Hz Resolution Bandwidth amplitude low in second XTAL pole. 435 RBW 300 • 300 Hz Resolution Bandwidth amplitude low in third XTAL pole. 436 RBW 300 300 Hz Resolution Bandwidth amplitude low in Fourth XTAL pole. 437 RBW 300 1 kHz Resolution Bandwidth amplitude low in first XTAL pole.
Page 226 • Unable to adjust 30 kHz Resolution Bandwidth in first LC pole. 471 RBW 30K Unable to adjust 100 kHz Resolution Bandwidth in first LC pole . . 472 RBW 100K Unable to adjust 300 kHz Resolution Bandwidth in first LC pole. 473 RBW 300K 474 RBW 1M Unable to adjust 1 MHz Resolution Bandwidth in first LC pole.
Page 227 6. If the voltage is either +15 V dc or -15 V dc, the A16 Cal • Oscillator is probably at fault. Normally, the voltage should be near +15 V during a sweep, and between -9 V and +9 V during retrace.
Page 228 • 524 RBW 10K Unable to adjust symmetry of 10 kHz Resolution Bandwidth in third XTAL pole. 525 RBW 10K Unable to adjust symmetry of 10 kHz Resolution Bandwidth in Fourth XTAL pole. 526 RBW <300 ADC timeout during IF ADJUST of <300 Hz Resolution Bandwidth. 521 RBW <300 Step gain correction failed for <300 Hz Resolution Bandwidth.
Page 229 561 LOG AMPL Unable to adjust amplitude of log scale. Possible problem in second • step gain stage . 562 LOG AMPL Unable to adjust amplitude of log scale. Possible problem in second step gain stage. 563 LOG AMPL Unable to adjust amplitude oflog scale. Possible problem in third step gain stage.
Page 230 4. Press and move the marker to the other side of the peak until the delta MKR reads 0 dB ~0.1 dB. • 5. IT the delta MKR frequency is between 90 kHz and 110 kHz, the 100 kHz Resolution Bandwidth is working properly. IT the frequency is outside these limits, read the following information on the A16 Cal Oscillator sweep generator.
Page 231: Eerom Checksum Errors (700 To 704)
Faults on the A2 Controller assembly cause these errors. Refer to Chapter 9, "Controller Section." Although some of these errors might result in a blanked display, it is possible to read these errors over HP-IB. Refer to "Troubleshooting to a Functional Section" in this chapter.
Page 232: Program Rom Check-Sum Errors (705 To 708)
HP part number. Refer to Chapter 4, "Replaceable Parts." Although some of these errors might result in a blanked display, it is possible to read these errors over HP-m. Refer to "Troubleshooting to a Functional Section" in this chapter. U306 Check-sum error of program ROM A2U306.
Page 233: System Errors (750 To 757)
SYSTEM Module Errors (800 to 899) These error codes are reserved for option modules, such as the HP 85629 Test and Adjustment Module and the HP 85620A Mass Memory Module. Refer to the option module manual for a listing of error messages.
Page 234: Block I>Iagram I>Escription
ATTENUATOR A4 lOG INPUT A16 CAL OSCillATOR 1I1XER (P/O A15) ---I ~~~+~6~-' ZE-R-- - - -- - - -- • ---I : ADe/1 iON - - NTER-FAC-E- CONTRO-LLER SECT SECTION HP-IB INTERFACE Figure 6-4. Functional Sections • 6-34 General Troubleshooting...
Page 235: A9 Input Attenuator
RF Section • The RF Section includes the following assemblies: A7 LODA (LO Distribution Amplifier) A8 Dual Band Mixer A9 Input Attenuator A10 YTF (YIG-Tuned Filter) All YTO (YIG- Tuned Oscillator) A12 RF Switch A13 Second Converter A14 Frequency Control Assembly (also in Synthesizer Section) A15 RF Assembly (also in Synthesizer Section) FL1, Two Low-Pass Filters The RF Section converts all input signals to a fixed IF of 10.7 MHz.
Page 236: Third Converter (Part Of A15)
A9 Input Attenuator The attenuator is a 50n precision, coaxial step attenuator. Attenuation in 10 dB steps from • dB to 70 dB is accomplished by switching the signal path through one or more of the four resistive pads. (Note that the input attenuator is not field-repairable.) A10 YTF The YTF is a tracking preselector.
Page 237 RF GAIN voltage, from A3, into two currents: RF GAIN1 and RF GAIN2. These currents • drive PIN diodes in the flatness compensation amplifiers . Synthesizer Section The first LO is phase-locked to the instrument internal 10 MHz standard by four PLLs. See Figure 6-5.
Page 238 Offset Lock Loop (part of A15) The 280 MHz to 298 MHz Sampling oscillator is used to sample the YTO. By changing the • offset Lock Loop programmable dividers, the YTO frequency can be changed. A11 YTO All is a YTO. YIG (yttrium-iron-garnet) is a ferro-magnetic material which is polished into a small sphere and precisely oriented in a magnetic field.
Page 239 • IF Section The IF Section processes the 10.7 MHz output of the RF Section and sends the detected video to the ADC/Interface Section. The following major assemblies are included in this section: A3 Interface Assembly A4 Log Amplifier Assembly A5 IF Assembly A16 Calibration Oscillator Assembly The spectrum analyzer uses trace-data manipulation to generate the 5 dB/DIY scale from...
Page 240 A16 output has three forms (all -35 dBm): • 10.7 MHz • • 9.9 to 11.5 MHz in 100 kHz steps • Frequency sweeps from 20 kHz to 2 kHz centered at 10.7 MHz (lasting 5 to 60 ms, respectively) The purposes of these signals are listed below: •...
Page 241 HSCAN high. Controller Section The Controller Section includes the A2 Controller assembly and A19 HP-IB assembly. The A2 assembly controls the A16 Cal Oscillator and A17 CRT driver through W7. The battery on the rear panel provides battery backup for STATE and TRACE storage.
Page 242 • DisplayjPower Supply Section A6 Power Supply The A6 Power Supply is a switching supply operating at 40 kHz for the low voltages and 30 kHz for the CRT supplies (cathode, filament, +110 V dc, and post-accelerator). A6A1 High Voltage Module contains the high-voltage transformer and post-accelerator multiplier. Power is distributed through W8 to A17 and through W1 to the rest of the assemblies.
Page 247 • ACe/Interface Troubleshooting The ADC/Interface Section includes the AlAI Keyboard, A1A2 RPG (rotary pulse generator), and A3 Interface assemblies. Topics covered in this chapter are listed below. Table 7-1 lists signal versus pin numbers for control cable W2. Troubleshooting Using the TAM Automatic Fault Isolation Keyboard/RPG Problems...
Page 248 • Table 7-1. W2 Control Cable Connections (101 2) A3J2 (pins) A4J2 (pins) A5J2 (pins) Al4J2 (pins) A15J2 (pins) Signal DGND DGND DGND DGND • DGND LRF_STB LFC_STB LIF_STB LLOG_STB VCMON DGND RT PULSE HSCAN DGND RESERVED OFL ERR R/T DAC3 AGND RF GAIN L03 ERR...
Page 249 Table 7-1. W2 Control Cable Connections (2 of 2) • A3J2 (pins) A4J2 (pins) A5J2 (pins) A14J2 (pins) A15J2 (pins) Signal AGND SCAN RAMP VIDEO TRIGGER AGND R/T DAC2 R/T DACI * Indicates signal source connectors • • ADC/lnterface Troubleshooting...
Page 250 • Troubleshooting Using the TAM When using Automatic Fault Isolation, the TAM indicates suspected circuits that need to be manually checked. Use Table 7-2 to locate the manual procedure. Table 7-3 lists assembly test connectors associated with each Manual Probe Troubleshooting test.
Page 251: Automatic Fault Isolation References
Table 7-2. Automatic Fault Isolation References • Suspected Circuit Indicated Manual Procedure to Perform by Automatic Fault Isolation Check ADC ASM ADC ASM Check ADC MUX ADC MUX Check ADC Start/Stop Control ADC Start/Stop Control Check Analog Bus Drivers Automatic Fault Isolation (in this chapter) Analog Bus Drivers Check Analog Bus Timing...
Page 252: Tam Tests Versus A3 Test Connectors
• Table 7-3. TAM Tests versus A3 Test Connectors Measured Signal Lines Connector Manual Probe Troubleshooting Test Video Input to Interface A3J105 Video to Rear Panel Video MUX MS1, MS3 LOG Offset/LOG Expand Video Filter Buffer Amp. MS3, MS5, OS1 Video Peak Detectors MS5, MS6 ADC MUX...
Page 253 Keyboard Interface Refer to function block G of A3 Interface Assembly Schematic Diagram (sheet 3 of 6) in the HP8560A/8561B/8563A Component Level Information binder. A pressed key results in a low on a keyboard sense line (LKSNSO through LKSNS7). This sets the output of NAND gate U607 high, generating KBD/RPGJRQ.
Page 254 RPG (Rotary Pulse Generator) Interface Refer to function block J of A3 Interface Assembly Schematic Diagram (sheet 3 of 6) in the HP8560A/8561B/8563A Component Level Information binder. U608B latches the RPG direction from the two RPG outputs, RPG_01 and RPG_02.
Page 255 10. Check U608 pin 5 (HRPG-IRQ) for narrow, high-going pulses occurring approximately • every 90 ms. 11. If HRPG-IRQ is correct but LRPG_RESET is incorrect, check U505 pin 13 (LKBD/RPG-IRQ) for narrow, low-going pulses occurring approximately every 90 ms. 12. If HRPG-IRQ and LKBD/RPG_IRQ are correct but LRPG_RESET is incorrect, suspect a failure on the A2 Controller assembly.
Page 256 • Triggering Problems Refer to function block H of A3 Interface Assembly Schematic Diagram (sheet 3 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The 1 MHz ADC clock provides synchronization in free run and single triggering. Line triggering synchronization originates on the A6 Power Supply. Trigger MUX A3U613A selects between free run, video, line, and external trigger sources.
Page 257 Preselector Peaking Control (Real-Time DAC) Refer to function block L of A3 Interface Assembly Schematic Diagram (sheet 4 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The spectrum analyzer uses a real-time DAC (RfT DAC1) to peak the preselect or.
Page 258 5. Check that the DVM reading increases from about 0 V dc to between +3.5 and +5.0 V dc as the RF gain DAC setting is increased from 0 to 255. • !~!:~E!mt, 6. If the DVM readings are incorrect, press (PRESET), (TRIG), , and...
Page 259 10. ITthere appears to be a peak detector problem, refer to "Positive/Negative Peak • Detectors" in this chapter . 11. Connect the spectrum analyzer CAL OUTPUT to the INPUT 50n and set the controls as follows: CENTER FREQ 300 MHz SPAN 0 Hz REF LVL...
Page 260 • Log Offset/Log Expand Refer to function block X of A3 Interface Assembly Schematic Diagram (sheet 5 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The log scales are modified using a combination of amplification and digital trace manipulation. The video input to the A3 assembly is either 10 dB/DIY or linear. To obtain the 5 dB/DIY scale, the CPU manipulates trace data from the 10 dB/DIY scale.
Page 261 • Refer to function block U of A3 Interface Assembly Schematic Diagram (sheet 5 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The AUX VIDEO port and the 0 SPAN CAL function are not used. Both Q220 and Q219 should be off at all times.
Page 262 3 MHz Video Filter Buffer Amplifier Refer to function block W of A3 Interface Assembly Schematic Diagram (sheet 5 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The video filter buffer amplifier provides outputs for video trigger, positive and negative peak detectors, and the analog zero-span (sweeps less than 30 ms).
Page 263 Positive/Negative Peak Detectors Refer to function blocks Y and Z of A3 Interface Assembly Schematic Diagram (sheet 5 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The following information pertains to the positive peak detector but is applicable to troubleshooting the negative peak detector.
Page 264 Q208 or CR203 or CR204. Peak Detector Reset Refer to function block R of A3 Interface Assembly Schematic Diagram (sheet 4 of 6) in the HP8560A/8561B/8563A Component Level Information binder]. 1. Press on the spectrum analyzer and set the controls as follows:...
Page 265 ADC MUX Refer to function block AA of A3 Interface Assembly Schematic Diagram (sheet 6 of 6) in the HP8560Aj8561B/8563A Component Level Information binder. The ADC MUX switches various inputs into the video path for conversion by the ADC. The SCAN RAMP input is used during non-zero-span sweeps.
Page 266 2. Refer to Table 7-9 and check for correct logic levels at A3U108 pins 1, 15, and 16. Check • for proper output signals at A3TP6. the select lines are not changing, suspect the ADC ASM or the VGAj ADC MUX Control. IT the select lines are changing, but the proper video inputs are not switching to the output, replace A3U108.
Page 267 Variable Gain Amplifier (VGA) Refer to function block AB of A3 Interface Assembly Schematic Diagram (sheet 6 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The VGA provides adjustable gain in the video path. Its nominal gain of 7 can be adjusted :I:10%.
Page 268 POS PEAK and NEG PEAK. ACC Control Signals Refer to function blocks B and F of A3 Interface Assembly Schematic Diagram (sheet 2 of 6) in the HP8560Aj8561B/8563A Component Level Information binder. The ADC requires two signals from the A2 Controller assembly: HBADC_CLKO and HBBKT _PULSE.
Page 269 Start/Stop Control • Refer to function block B of A3 Interface Assembly Schematic Diagram (sheet 2 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The ADC Start/Stop Control determines the start time of all ADC conversions. Multiplexer A3U509 chooses the source of the start signal. Both HSTART_SRC and HBUCKET tell the ASM to start a conversion.
Page 270 • ADCASM Refer to function block F of A3 Interface Assembly Schematic Diagram (Sheet 2 of 6) in the HP8560A/8561B/8563A Component Level Information binder. 1. Press on the spectrum analyzer and set the controls as follows: (PRESET) SPAN 0 Hz...
Page 271 Ramp Counter R~fer to function block D of A3 Interface Assembly Schematic Diagram (sheet 2 of 6) in the HP8560A/8561B/8563A Component Level Information binder. The ramp counter is used for nonzero-span sweeps and for zero-span sweep times greater than 30 ms.
Page 272 Use the following procedures to help isolate control problems. Analog Bus Drivers Refer to function block N of A3 Interface Assembly Schematic Diagram (sheet 4 of 6) in the HP8560A/8561B/8563A Component Level Information binder. 1. Press on the spectrum analyzer and set the controls as follows:...
Page 273 Analog Bus Timing Refer to function block P of A3 Interface Assembly Schematic Diagram (sheet 4 of 6) in the HP8560A/8561B/8563A Component Level Information binder. Analog bus timing generates the strobes for the A4, A5, A14, and A15 assemblies. The A14 Frequency Control assembly also requires a qualifier for its strobe, LVFC-.ENABLE.
Page 274: Demultiplexer A3U410 Truth Table
[AMPLITUDE) Interface Strobe Select Refer to function block K of A3 Interface Assembly Schema.tic Diagram (sheet 3 of 6) in the HP8560A/8561B/8563A Component Level Information binder. Interface-strobe select generates the various strobes used by circuits on the A3 Interface assembly. Table 7-10 and Table 7-11 are the truth tables for demultiplexers A3U410 and A3U500.
Page 276 IF Section The IF Section contains the A4 Log Amplifier, A5 IF, and A16 Cal Oscillator assemblies. Troubleshooting Using the TAM Troubleshooting A4 with the TAM Troubleshooting A5 with the TAM Troubleshooting A16 with the TAM Automatic IF Adjustment Parameters Adjusted Requirements 8-10 Performance Test Failures...
Page 277 Figure 8-1 illustrates the location of A3, A4, and A5 test connectors. Figure 8-2 illustrates the IF Section. Note HP 85629A Test and Adjustment Modules with firmware revisions A, B, or C • cannot make valid measurements on test connector A5J8, A4J7, or A4J8 .
Page 278: Automatic Fault Isolation References
Table 8.1. Automatic Fault Isolation References • Suspected Circuit Indicated Manual Procedure to Perform by Automatic Fault Isolation Check Al6 Cal Oscillator Troubleshooting Al6 with the TAM Check Input Switch on A5 IF Assembly Troubleshooting A5 with the TAM Check Linear Amplifiers on A4 Log Amplifier Linear Amplifiers Check Log Expand on A3 Interface Assembly Refer to "Log Expand"...
Page 279: Tam Tests Versus Test Connectors
• Table 8-2. TAM Tests Versus Test Connectors (1 of 2) Manual Probe Troubleshooting Test Measured Signal Lines Connector Video Input to Interface A3J105 Video to Rear Panel Video MUX Log Offset/Log Expand MSl,MS3 Video Filter Buffer Amplifier MS3, MS5, OSI Video Peak Detectors MS5, MS6 MS6.
Page 280 Table 8-2. TAM Tests Versus Test Connectors (2 of 2) • Manual Probe Troubleshooting Test Measured Signal Lines Connector Ref 15 dB Attenuator Stage MSl, MS2, MS3 A5J7 2nd Step Gain Stage MS2, MS3, MS4 2nd/3rd Step Gain Stage MS3, MS4, MS5 3rd Step Gain Stage MS4, MS5, MS6 MS5, MS6, MS7...
Page 281 • -35 dBm ..-.-------- 10.7 MHz IA16 CAL OSCillATOR'. ~ OdBm 10.7 MHz iASSEMBLY IA51F IF ADJ OFF ASSEMBLY - - woo \ : ~ {9j ' " ('MiITE) RESOLUTION IF" GAIN RESOLUTION INPUT F"ROM BANDWIDTH BANDWIDTH A15J601 --.J (VIOLET) 10.7 (ORANGE) IF ADJ OFF...
Page 282: Troubleshooting A16 With The Tam
If a failure is indicated in the IF CHECK, press to provide more detailed information about the detected failure. If an HP-IB printer is available, !E!~n~i!!~I. connect it to the analyzer HP-IB connector, then press for a hard copy output .
Page 283: Sweep Width Settings
2. Set the other spectrum analyzer center frequency to 10.7 MHz and the reference level to -30 dBm. 3. Observe the spectrum analyzer display while pressing ..on the HP 8563A. 4. If a -35 dBm signal does not appear, the A16 Cal Oscillator is probably at fault. •...
Page 284: Parameters Adjusted
Parameters Adjusted • The following IF parameters are adjusted in the sequence listed: 1. Amplitude A. Video Offsets: analog (using A4 Log Amplifier video offset DAC) and digital (applying stored constant to all readings) 1. Linear Scale Offset 2. Log Scale Offset a.
Page 285: Requirements
r------------------------------------------~~~------ B. 10 kHz resolution bandwidth 1. Center frequency of LC tank that loads the crystal • 2. Symmetry adjustment to cancel crystal case capacitance. 3. Bandwidth C. 3 kHz resolution bandwidth: center frequency of LC tank and bandwidth of resolution bandwidth D.
Page 286: Signal Level For Reference Level Display
IF Gain Uncertainty Performance Test • Failure of this performance test indicates a possible problem with the spectrum analyzer IF gain circuits. Assuming no major IF problems causing IF adjustment errors, IF gain problems in the first 50 dB of IF gain (REF LVLs of 0 dBm to -50 dBm with 10 dB ATTEN) are a result of faults on the A5 IF Assembly.
Page 287: Scale Fidelity Performance Test
4. Set the signal generator controls as follows: Amplitude +10 dBm • Frequency 10.7 MHz 5. Simultaneously decrease the signal generator output and the spectrum analyzer REF LVL in 10 dB steps. The signal displayed by the spectrum analyzer should remain at the reference level for each step.
Page 288: Log Amplifier
2. Remove W27 from A4J3 and inject a 10.7 MHz signal of +10 dBm into A4J3. 3. Check the signal levels at TP405 and TP406. Use an active probe with an HP 8566A/B Spectrum Analyzer set to linear mode .
Page 289: Linear Amplifiers
• Linear Amplifiers Refer to function block N of A4 Log Amplifier Schematic Diagram (sheet 3 of 4) in the HP8560A/8561B/8563A Component Level Infonnation binder. The linear amplifier chain is made up of two common emitter gain stages, a 180 splitter, and four buffer stages.
Page 290: Detector
Detector • Refer to function block 0 of A4 Log Amplifier Schematic Diagram (sheet 3 of 4) in the HP8560A/8561B/8563A Component Level Information binder. Note The detector can only be factory-repaired; replace the A4 assembly if the • detector is faulty. Do not adjust R549, the factory-only linearity adjustment .
Page 291: Video Offset
Video Offset Refer to function block S of A4 Log Amplifier Schematic Diagram (sheet 4 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The circuit provides a programmable offset of 161 mV to +485 mV in 5 mV steps.
Page 292: Frequency Counter Prescaler/Conditioner
11. Reconnect W26 (coax 2) to A4J6. Frequency Counter Prescaler /Conditioner Refer to function block P of A4 Log Amplifier Schematic Diagram (sheet 3 of 3) in the HP8560A/8561B/8563A Component Level Information binder. The Frequency Counter PrescalerjConditioner converts the IF signal to TTL levels, divides the frequency by two, and then attenuates it.
Page 293 4. Set the HP 8566A/B to 4.8 kHz center frequency and 2 kHz span. 5. Connect the VIDEO OUTPUT (rear panel) of the spectrum analyzer through a 20 dB attenuator and dc block to the input of the HP 8566A/B. Set the sweep time of the HP 8566A/B to 10 seconds.
Page 294 Damage to the HP 8566A/B results if a dc block is not used. The HP • Caution 8566A/B and many other spectrum analyzers have dc-coupled inputs and cannot tolerate dc voltages on their inputs. 5. Set the HP 8566A/B to single trigger and press TRACE B Trigger a sweep [CLEAR-WRITE ).
Page 295 For troubleshooting, it is recommended that you use an active probe, such as Caution an HP 85024A, and another spectrum analyzer. If an HP 1120A Active Probe is being used with a spectrum analyzer having dc-coupled inputs, such as the...
Page 296 2. Connect the source connection of a 3 dB power splitter to A5J5. (Minicircuits Model: ZSC J-2-1) Connect one output of the power splitter to the input of an HP 8566A/B Spectrum Analyzer. Connect the other output of the power splitter to cable W27 (coax 3).
Page 297 HP 8566AjB on the (SINGLE] spectrum analyzer. Figure 8-4 through Figure 8-8 illustrate detailed IF signatures of a properly operating HP 8563A. 9. Reconnect W27 (coax 3) to A5J5. ATT N 20 dB 10.0 dSm 10 dB/ SAMPLE II •.
Page 298 • 10.0 dBm ATTEN 20 dB 3RD STEP STEP._ STEP GAIN STAGE CA'N STAGE 5 dB/ rAGE SAMPLE "' - 2ND STEP TACE CAIN STAGE r-..••.•..• I" 1!5d8 REFERENCE ATTENUATOR 1~48 REFERENCE ATTENJA TOll CENTER 10.700 000 MHz SPAN 0 Hz RES BW 300 kHz VBW 300 kHz SWP 500...
Page 299 • 10.0 dBm ATTEN 20 dB 10 dB/ SAMPLE VIDEO LOG / OFFSETS CENTER 10.700 000 MHz SPAN 0 Hz RES BW 300 kHz VBW 1 kHz SWP 1.40 Figure 8-7. Detailed IF Adjust Signature (4) • 10.0 dSm ATTEN 10 dB/ SAMPLE LC POLE...
Page 300 Common IF Signature Problems • • Region A of Figure 8-4 is noisy: Suspect the first LC pole. • Region B of Figure 8-4 is flat: Suspect the third step-gain stage, the fine attenuator, or the fourth LC-pole output amplifier. •...
Page 301 • ATTEN 20 dB 10.0. dBm 5 dB/ SAMPLE CENTER 10.700 SPAN 0 Hz SWP 500 BW 300 Figure 8-10. Noise with Correct Shape 10.0 dBm ATTEN 20 dB • 5 dB/ SAMPLE "' "' \ ~.LIJ "- ~~'I CENTER 10.700 000 MHz SPAN 0 Hz...
Page 302 • 10.0 dBm ATTEN 20 dB 5 dB/ SAMPLE ""-...J ..II ~I~. CENTER 10.700 000 MHz SPAN 300 kHz SWP 500 RES BW 300 Figure 8-12. Region B Amplitude Offset 1 MHz Resolution Bandwidth Problems • Check the crystal shorting switches as follows: 1.
Page 303 • .ATTEN 10d8 0dBm 10dB/ BROKEN XTAL SHO T CENTER 300.0000MHz SPAN 500.0kHz .R8W 1.0MHz 1.0MHz SWP 50ms Figure 8 13. Faulty Crystal Short .ATTEN 10d8 • 0dBm 10d8/ KPOI E ...•..• I--'" L--- ---- CENTER 300.0000MHz SPAN 3.000MHz .RBW 1.0MHz 1.0MHz SWP 50ms...
Page 304 30 kHz Resolution Bandwidth Problems • Shape factor too high: Shape factor is the ratio of the 60 dB bandwidth to the 3 dB bandwidth. Shape factor should be less than 15:1. If one of the LC poles malfunctions, the shape factor may be the only indication of the failure.
Page 305 Figure 8-15. Faulty Crystal Symmetry Step Gains Refer to function blocks B, H, and I of A5 IF Filter Schematic Diagram (sheets 1 of 3 and 2 of • 3) in the HP8560A/8561B/8563A Component Level Information binder. I"~ 1. On the spectrum analyzer press (GHzl.
Page 306 A 16 Cal Oscillator Assembly • The A16 Cal Oscillator supplies the stimulus signal for Automatic IF adjustments. Normally, the oscillator operates only during retrace (for a few milliseconds) to adjust part of the IF. (All IF parameters are to be readjusted about every 5 minutes.) With continuous IF adjust ON, a group of IF parameters are adjusted during each retrace period (non-disruptive).
Page 307 Inadequate CAL OSC AMPTD Range (A 16R32) Refer to function block E of A16 Calibration Oscillator Schematic Diagram in the HP8560A/8561B/8563A Component Level Information binder. 1. If A16R32, CAL OSC AMPTD, has inadequate range to perform the IF Amplitude Adjustment, press (CAL 2.
Page 308 3. Connect the source connection of a 3 dB power splitter (Minicircuits Model: ZSC J-2-1) to A16J2. Connect one output of the power splitter to the input of an HP 8566A/B Spectrum Analyzer. Connect the other output of the power splitter to cable W30 (coax •...
Page 309 3 kHz resolution bandwidth errors (less than 30%) indicate a problem with A16 U7, Ull, and U12. 10. Severe failure of the bandwidth accompanied by subtle errors in the A16 output signal indicate an A5 failure. 11. Set the HP 8566A/B controls as follows: RESOLUTION BANDWIDTH 10 kHz VIDEO BW...
Page 310 • 8562 A16 sweeps--3 REF -43.0 A TTEN 10 dB ...•...••. -..""- "" "- " " CENTER 10.800 SPAN 0 RES BW 100 kHz 10 kHz SWP 50.0 msec Figure 8-17. Output Waveform, 3 kHz Resolution Bandwidth • • IF Section 8-35...
Page 311 14. On the spectrum analyzer, press When the message IF ADJUST STATUS: appears, press on the HP 8566A/B. Hz RBW (SINGLE] 15. Figure 8-19 illustrates normal operation. Severe failures (slope error >30%) and 3 kHz resolution bandwidth errors (less than 30%) indicate a problem with A16U7, Ull, and U12.
Page 312 • 8562 A16 sweeps--300 Hz REF -43.0 dBm ATTEN 10 dB 1 dB/ l-f.J\ •..c..,.."-- CENTER 10.710 000 MHz SPAN 0 RES BW 10 kHz 1 kHz SWP 200 msec Figure 8-19. Output Waveform, 300 Hz Resolution Bandwidth •...
Page 313 Low-Pass Filter Refer to function block D of A16 Calibration Oscillator Schematic Diagram in the • HP8560A/8561B/8563A Component Level Information binder. 1. Connect a DVM positive probe to A16J4 pin 4. 2. On the spectrum analyzer, press (CAL ). 3. Press .
Page 314 4. On the spectrum analyzer press and set the fAUX CTRL • sweep time to 5 seconds. 5. Vary the volume and listen for the variation in speaker output level. Clipping is normal on the highest settings. 6. If the audio is not working correctly, disconnect the cable W28 connecting the audio signal from A4 to A16 at A4J5.
Page 318 • Controller Section The Controller Section includes the A2 Controller assembly, A19 HP-IB assembly, and BTl Battery. The presence of a display (graticule and annotation) verifies that most of A2 Controller assembly is operating properly. Troubleshooting Using the TAM Blank Display Digital Signature Analysis (DSA) •••••••••••...
Page 319: Tam Tests Versus Test Connectors
Blank Display Use the following procedure if the instrument display is blank. This procedure substitutes an HP-IB printer for the display. 1. Connect the printer to the spectrum analyzer and set the printer address to the value required by the TAM. This is usually 1.
Page 320 • CONTROLLER J202 J201 (REVISION CONNECTOR) J 11 (TAM TEST CONNECTOR) Figure 9-1. A2 Test Connectors 9. Press the fourth softkey. The results are sent to the printer. 10. If a failure is indicated in any of these tests, the fault lies on the A2 Controller assembly. •...
Page 321 Display Problems Line Generators Refer to function blocks D and I of A2 Controller Schematic Diagram (sheet 1 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The line generators convert digital display information to an analog output suitable to drive the A17 CRT Driver assembly.
Page 322 Figure 9-2. Line Generator Output Waveforms Blanking Refer to function block J of A2 Controller Schematic Diagram (sheet 1 of 4) in the HP8560A/8561B/8563A Component Level Infonnation binder. 1. Using an oscilloscope, check for blanking pulses at A2J202 pin 15. A2U206 pin 6 should be at a TTL high.
Page 323 4. Compare the blanking-circuit input signals at the following test points with those • illustrated in Figure 9-3. BLANKING: J202 pin 15 BLANK: U214 pin 12 VECTOR: U214 pin 11 U213 pin 13 5. The waveforms in Figure 9-3 must match the timing of the vectors being drawn. To do this, U215B is used to adjust the leading edge, and U215A is used to adjust the trailing edge.
Page 324 Display Jumbled or Trace Off Screen Refer to function blocks D and I of A2 Controller Schematic Diagram (sheet 1 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The two line generators are identical circuits, so the following steps apply to both; references are to the X generator with Y references in parentheses.
Page 325 6. Compare the line-generator input signals at the following test points with those illustrated • in Figure 9-5. INTEGRATE and SAMPLE waveforms are replicas of VECTOR except for polarity and amplitude. LCHAR is low when characters are drawn. INTEGRATE: Q202 collector SAMPLE: Q201 collector LCHAR: U207 pin 9 VECTOR: U213 pin 9...
Page 326 U203 pin 1 • 12. Figure 9-7 illustrates the waveforms in step 11. expanded to show relative timing. the second and fourth traces are delayed by 5 ms from the first and third. The oscilloscope settings are changed as follows: J.Ls/nrv Sweep Time 13.
Page 327 • 10.0 us/div 0.000 s 800 V/div 0.00 V U201A-1 1,--..-,-- U203A-1 r--I ""' '---J Figure 9-8. Normal XfY Line Generator Waveforms Intensity 1. The length of the vector being drawn can affect intensity (U210A, U210C, and U210D). Refer to "Long Lines Dimmer Than Short Lines." 2.
Page 328 • binder . 6. If the waveform at U210D pin 14 is bad, troubleshoot the Z Output circuit (function block M of A2 Controller Schematic, sheet 1 of 4) in the HP8560A/8561B/8563A Component Level Information binder. 7. Remove the short from J201 pin 13 to ground. Short A2J201 pin 1 to ground.
Page 329 9. The waveforms should look like those illustrated in Figure 9-10. If the waveform at J201 pin 14 is bad, troubleshoot the Y line generator (function block I of A2 Controller • Schematic, sheet 1 of 4) in the HP8560A/8561B/8563A Component Level Information binder.
Page 330 Log Amplifier assembly. Perform the following steps to determine whether the problem is on the A4 Log Amplifier or A2 Controller assembly: 1. Disconnect W21 from A2J7. 2. Connect the output of a synthesized source, such as an HP 3335A, to A2J7. 3. Set the synthesized source controls as follows: Amplitude...
Page 331 Frequency Counter • Refer to function block Z of A2 Schematic Diagram (sheet 4 of 4). The frequency counter counts the last IF frequency and provides accurate timing signals for digital zero-spans. The circuit also provides timing signals to the A3 Interface assembly analog to digital converter (ADC).
Page 332 CRT changed according to the program, the A2 Controller assembly is working properly. • Refer to Chapter 7, "ADCfInterface Section." • If there was no response over HP-IB, the A2 Controller is probably defective. Be sure to also check the A19 HP-IB assembly and A19Wl. Controller Section...
Page 333 • If there was an improper response (for example, the displayed ATTEN value changed but • no clicks were heard), the A2 Controller is probably working properly. 3. Monitor A2U2 pin 2 with a logic probe for pulses while pressing a key and rotating the knob.
Page 335 • Synthesizer Section The Synthesizer Section includes the A7 First LO Distribution Amplifier, All YTO, and parts of the A14 Frequency Control and A15 RF assemblies. Simplified and detailed block diagrams for each assembly are located at the end of this chapter. Confirming a Faulty Synthesizer Section 10-2 Troubleshooting Test Setup...
Page 336 For troubleshooting, it is recommended that you use an active probe, such as Caution an HP 85024A, with a spectrum analyzer. If an HP ll20A Active Probe is being used with a spectrum analyzer having dc-coupled inputs, such as the...
Page 337 The voltage remains at approximately +5.5 V de. If the tune voltage is correct, but the ADC measures the voltage and determines it to be out of specification, troubleshoot the A3 assembly ADC MUX. Table 10-1. Center Frequency Tuning Values HP 8563A Center Frequency Sampling Oscillator Frequency (MHz) (MHz) 389.5...
Page 338 troubleshoot the A7 LODA. If neither a signal nor is displayed, check ERR 334 LO AMPL • All YTO as follows: a. Set jumper A14J23 to the TEST position. b. Set the spectrum analyzer controls as follows: CENTER FREQ ;........50 Hz CF STEP 300 MHz...
Page 339 19. Connect a frequency counter to A15J10L Connect a high-frequency test cable from an HP 8340A/B Synthesized Sweeper to A15A2J1. See Figure 10-2. 20. Connect a BNC cable from the spectrum analyzer 10 MHz REF IN/OUT to the HP 8340A/B FREQUENCY STANDARD EXT input.
Page 340 • BNC CABLE FREQUENCY COUNTER FREOUENCY SYNTHESIZED STANDARD SWEEPER SPECTRUM ANALYZER gggg ~~c. .c ~~ ceco C ClOO TEST CABLE :ecce. c::n::IcC CO c~ ecce ClDa ClClClDD A14FREO CONTROL A15 RF ADAPTER SMA CABLE Figure 10-2. Sampler and Sampling Oscillator Test Setup 24.
Page 341 Table 10-2. Sampling Oscillator Test Frequencies • HP 8563A HP 8340A Frequency of Offset PLL Center Frequency (MHz) CW Frequency (MHz) Sampling Oscillator (MHz) 4300.2 389.5 280.0 427.0 4337.7 282.5 449.5 4360.2 284.0 464.5 4375.2 285.0 479.5 4390.2 286.0 502.0 4412.7...
Page 342 • To display the nominal YTO frequency, press • (CAL "~Qit"~f!gl. Table 10-3. YTO Frequency in TEST Position Roller Oscillator Frequency YTO Pretune Accuracy Nominal YTO Frequency LO Frequency -104 -93 MHz + 10 MHz +30/-10 -73 MHz LO Frequency %20 MHz -65 MHz LO frequency...
Page 343 • FREQUENCY CONTROL J901 (REVISION J501 J304 J502 CONNECTOR) J200 J302 (REVISION CONNECTOR) J602 Jl01 A15A2J1 J601 J801 • Figure 10-3. A 14 and A 15 Test Connectors • Synthesizer Section 10-9...
Page 344: Automatic Fault Isolation References
Table 10-4. Automatic Fault Isolation References (1 of 2) • Suspected Circuit Indicated Manual Procedure to Perform by Automatic Fault Isolation Check the YTO Loop Confirming a Faulty Synthesizer Section Check 1st LO (steps 9-11) Check 1st LO Pretune Frequency and Amplitude Unlocked YTO PLL (steps 10-13) Check 3rd LO Drive Third LO Driver amplifier (steps 1-6)
Page 345: Automatic Fault Isolation References
Table 10-4. Automatic Fault Isolation References (2 of 2) • Suspected Circuit Indicated Manual Procedure to Perform by Automatic Fault Isolation Check Offset Oscillator PLL Offset Oscillator PLL 14-18) (steps Check Offset Oscillator PLL Pre-Scaler Offset Oscillator PLL 9-13) (steps Check Offset Oscillator Pretune Circuitry Offset Oscillator PLL 4-8)
Page 346: Tam Tests Versus Test Connectors
Table 10-5. TAM Tests versus Test Connectors (1 of 2) • Connector Manual Probe Troubleshooting Test Measured Signal Lines A14J15 Sweep Generator Span Attenuator DAC Span Attenuator Switches Sweep Tune Mult Input Amp MS1,OSI Sweep Tune Mult Input Switches MS1, MS3 VCO Sweep Driver MS6,OSI A14Jl6...
Page 347 Table 10-5. TAM Tests versus Test Connectors (2 of 2) • Connector Manual Probe Troubleshooting Test Measured Signal Lines A14J303 XFER Amp Bias .Main Amp Bias Out Amp Bias Main Osc Bias Main Pretune DAC Course Adj DAC Fine Adj DAC Span Multiplier DAC A15J200 Positive 15 Volt Supply...
Page 348 General PLL Troubleshooting • The synthesizer section relies heavily on phase-lock loops (PLLs). Typically, faulty PLLs are either locked at the wrong frequency or unlocked. The information below applies to troubleshooting these two classes of problems on a generalized PLL. Locked at Wrong Frequency Numbers in the following text identify items on Figure 10-4.
Page 349 r------------------~------------------------------.-.------ a. The voltage at (1) should increase as the frequency increases on the following PLLs: • YTO PLL A14J17 pin 1 (YTO LOOP ERROR) Reference PLL A15J502 pin 3 (L03 ERR) Sampler PLL A15J200 pin 13 (OFL ERR) b. The voltage at (1) should increase as the frequency decreases on the following PLLs: Main Roller PLL A14U115B pin 7 (MAINSENSE) Offset Roller PLL...
Page 350: Sweep Signal Destination Versus Span
• Frequency Span Accuracy Problems The spectrum analyzer employs lock-and-roll tuning to sweep the 1st The 1st locked to the start frequency immediately after the previous sweep is completed. The 1st is then unlocked, and, when a trigger signal is detected, the 1st sweeps (rolls).
Page 351 3. Verify that a -1.2 V to -4.8 V ramp (approximately) is present at A14U331 pin 2. 4. If this ramp is not present, troubleshoot the MainfFMfVCO Sweep Switch. See function block G of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder .
Page 352: Settings Of Sweep Switches
5. Check the state of the Main/FM/VCO Sweep Switches as indicated in Table 10-8. 6. The rest of the procedure troubleshoots the YTO FM Coil Driver. Refer to function block N of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A •...
Page 353 12. Set the dc-voltage source output for +10 V de. The 1st LO frequency should increase • approximately + 15.6 MHz. 13. The voltage at A14U332 pin 2 should be approximately 19% of the voltage at A14J23 pin 14. If the 1st LO frequency did not change in step 12, set the spectrum analyzer switch (LINE) OFF and disconnect W10 from A14J3.
Page 354 The waveform should be a 0 V to -10 V sweep of 50 ms duration. See Figure 10-7. • Check for a 0 V to -10 V ramp at A14J15 pin 13. Refer to function block H of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder .
Page 355 100 kHz, troubleshoot the Offset Oscillator Sweep/Hold circuit. Refer to function block AD of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder . • If the Offset Oscillator Sweep/Hold circuit is operating properly, Replace the A14AI01 Offset Oscillator.
Page 356 4. If there isa 0 to -10 V ramp at A14J15 pin 14, the fault is probably in the Main/FM/VCO Sweep Switch. See function block G of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder.
Page 357: Settings For Switches And Comparators
• according to the percentage of the total span that the band is covering. See function block L of A14 Schematic Diagram (sheet 1 of 5) in the HP8560A/8561B/8563A Component Level Information binder. Also, the sum of the individual ramps is 10 V. Figure 10-8 illustrates both sweep and the scan ramp for a 2.75 to 22 GHz span (the preset state).
Page 358 • Unlocked YTO PLL Operation The All YTO is locked to two other oscillators, the roller PLL main oscillator and the offset PLL sampling oscillator. For LO spans of 1.01 MHz and above, either the FM or Main Coil of the YTO is swept directly.
Page 359 The YTO main coil filter is used to improve residual FM in FM spans. See function block E of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder. Transistors Q304 and Q305 switch the filter (capacitor C36 and resistor R48) into the circuit.
Page 360 Table 10.11. Amplifier Polarities • YTO Error VCO Sweep ERRSGN VCOSGN Sign Amplifier Driver (A14U313 pin (A14U425 pin Amplifier Positive Roller Offset Positive Negative High Osclllator Sampler IF Swept Negative Negative Negative TTL Low TTL High Sampler IF Roller Main Positive Positive Positive...
Page 361 • -:--l r-- - - - - - - - - - - - - A14 FREQUENCY CONTROL ASSEMBLY • • J15-4 MAIN COIL TUNING FM COl L TUNING MAIN COIL FINE DAC LO DIST. A15A2Jl 15 RF -ASSEMBL Jl0l' SAMPLER J501 LO DR I VE...
Page 362 5. Calculate the YTO frequency-error by subtracting the frequency recorded in step 3 from • the frequency recorded in step 4. Record the result below: YTO Frequency Error YTO Frequency Error YTO Frequency YTO Frequency (MEASURED) (CALCULATED) [I[fi%li~igljjti,lmi,II;:~[q!~:~~!., 6. On the spectrum analyzer, press Record the main roller frequencybeIow;- Main Roller Frequency 7.
Page 363: Yto Frequency Errors With A14J23 On Pins 2 And
15. Monitor the roller oscillator PLL output at A14J304 (ROLLER TST) with a synthesized spectrum analyzer such as an HP 8568A/B or HP 8566A/B. Refer to function block AQ of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder.
Page 364 25. Disconnect W32 from A15J101. Monitor the sampler IF output (A15J101, SAMPLER IF) with a synthesized spectrum analyzer such as an HP 8568A/B or HP 8566A/B. 26. The sampler IF should measure between 74 MHz and 114 MHz at -15 dBm to +2 dBm.
Page 365: Voltages In Fm Coil And Main Loop Drivers
35. Steps 27 through 31 verify that the YTO-Ioop error voltage is reaching the FM coil. Refer to function blocks N and 0 of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder. To troubleshoot the YTO FM Coil Driver, refer to step 6 of "First-La Span Problems (1 MHz to 20 MHz)."...
Page 366 47. Measure the output of the main coil tune DAC (A14J18 pin 3) with a DVM. Refer to function block C OfA14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 48. If the spectrum analyzer center frequency is 300 MHz, the voltage at A14J18 pin 3 should measure -3.35 V :1:0.25V.
Page 367 If a synthesized spectrum analyzer is not available, connect A14J304 to the Note input of a 20 dB gain amplifier, such as an HP 8447E. Connect the output of " the amplifier to the input of a frequency counter .
Page 368 5. Measure the unlocked offset oscillator frequency at A14TP302. If the frequency is not 200 MHz :C10 MHz, short U416 pin 14 to ground. Refer to function block AD of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder.
Page 369 J.Ls divider output) and uno pin 15 (VCO divider output). Refer to function block AC of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 17. Short A14A101 pin 14 of the offset oscillator to A14A101 pin 20. This sets the offset oscillator TUNE+ line at +10 V, setting the offset oscillator to its maximum frequency.
Page 370 A14A102 Transfer Oscillator. The amplitude at TP301 should be approximately -4 dBm. Refer to function block AI of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 2. The voltage at A14J302 pin 1, XFER OSC BIAS, should measure +7.5 V dc :H V.
Page 371 • and the transfer oscillator pretune DAC address decoder, U302. Refer to function block AK of A14 Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 9. If the offset roller is locked, then the address decoder is correct; U302 decodes a single address for both the offset oscillator pretune DAC and the transfer oscillator pretune DAC.
Page 372 3. IT the output of A14TP305 is not correct, confirm that the voltage at J303 pin 1, Out Amp Bias, is between +3 V dc and +6 V dc. Refer to function block AO of A14 • Frequency Control Schematic (sheet 5 of 5) in the HP8560A/8561B/8563A Component Level Information binder.
Page 373 0 V, check U401 Roller Interface Latch and its address decoder U303. Refer to function block AG of A14 Frequency Control Schematic (sheet 5 of 5) and function block B of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder.
Page 374 A15TP402 for +7 dBm. 9. If the signal does not measure about 7 +dBm, troubleshoot the Offset Lock Loop Buffer (function block AM of A15 RF Schematic sheet 3 of 3) in the HP8560A/8561B/8563A Component Level Information binder.
Page 375: Sampling Oscillator Pll Divide Ratios
Table 10-15. Sampling Oscillator PLL Divide Ratios • Sampling Center Divide TP 406, N Control M Control Oscillator Freq.* Ratios TP 407t Lines Lines Freq. (MHz) (MHz) (MHz) 280.0 389.5 high high high high 282.5 427.0 low high high high 284.0 449.5 high high high low...
Page 376 11. If the feedback signal is not near the indicated power, measure the signal at the following test points on the feedback path. Refer to function blocks AD, AG, and AH of A15 RF • Schematic (sheet 3 of 3) in the HP8560A/8561B/8563A Component Level Information binder.
Page 377 Transistor Q703 provides active bias for oscillator transistor Q701. Transistor Q704 provides active bias for 600 M Hz buffer amplifier Q702. Refer to function blocks Q and R of A15 RF Schematic (sheet 2 of 3) in the HP8560A/8561B/8563A Component Level Information binder.
Page 378 Component Level Information binder. 15. Measure the signals at the following test points with an active-probe/spectrum-analyzer combination such as an HP 85024A/HP 8566A/B. The signal level at TP701 should be sufficient to drive an ECL input. TP506 50 MHz, 2:+3 dBm...
Page 379 29. IT the front panel CAL OUTPUT amplitude is out of specification and cannot be brought within specification by adjusting A15R561, CAL AMPTD, check the calibrator automatic gain controller (AGC) amplifier with the following steps. Refer to function block W of A15 RF Schematic (sheet 3 of 4) in the HP8560A/8561B/8563A Component Level Information binder.
Page 380 4. Check that PIN diode switches CR603 and CR605 are reverse-biased by approximately +10 V dc. Refer to function block F of A15 RF Schematic (sheet 1 of 3) in the HP8560A/8561B/8563A Component Level Information binder. 5. Measure 300 MHz signal at A15TP503 using an active-probe/spectrum-analyzer combination.
Page 381 5. Connect the microwave source to A15A2J1. A 94.7 MHz signal at approximately 0 dBm • should be displayed on the other spectrum analyzer . 6. Use an active-probejspectrum-analyzer combination to measure the signal at the following test points: A15TP101 94.7 MHz, -25 dBm A15TP201 294 MHz, +17 dBm...
Page 382 • integrator, U320B. See function block K of A14 Frequency Control Schematic (sheet 2 of 5) in the HP8560A/8561B/8563A Component Level Information binder. This current is scaled by resistors R20 through R24 and U312BfCfD. See Figure 10-10. The capacitors used in the integrator depend on the sweep-time range;...
Page 383 During retrace, HSCAN is low, closing U306B and U312A. See Figure 10-11. The output • of U320A tries to go high, turning CR6 on and sourcing current through R26. This current discharges the capacitors in the integrator, forcing U320B pin 7 toward 0 V dc. Ultimately, the output of U320B is set and held to 0 V by U320A supplying a current equal to that which is sunk by the current source.
Page 384 • r---- A7 1ST LO DIST "A14F-REQUENCY CONTROCj AMPLifiER J3 14.5 TO 18.5 dBm 1ST LO OUT TO fRONT PANEL ASSEMBLY J2 13 TO 16 dBm 1ST MIXER OUT TO A8 -9 TO -2 dBm TO -2 3 TO 6.8 CHz LO fRED BLACK ROLLER...
Page 385 • J501 SAMPLER IF FROM A15 -15 TO OdBm ,..------------ A14 FREQUENCY CONTROL LOOP ERROR TO COIL F"-A DRIVER "-AHz/V 1.56 TP305 0 dBm MAIN PRE- TUNE DAC D> VCO RAMP FROM VCO SWEEP DRIVER MAIN ROLLER OUTPUT MAIN OSC SWEEP/HOLD FILTER J304...
Page 386 • 1ST LO SAMP J501 CAL OUTPUT FROM A7 LODA TO FRONT PANEL TO SIG 10 OSCILLATOR > A15Rr:-- LEVELS 600 MHz PLL 3RD LO DRIVER A 15A2 SAMPLER CAL IBRA TOR AGC AMP (;;\ A15Jl~ Als;.2Jl SAMPL~~ IF TO TP503 280 TO -15 TO...
Page 387 If adjustment is necessary, the spectrum analyzer must be on and the internal frequency • reference selected continuously for a minimum of 24 hours immediately prior to oscillator adjustment, to allow both the temperature and frequency of the oscillator to stabilize. Failure to allow sufficient stabilization time could result in oscillator misadjustment.
Page 390 • RF Section The RF Section converts the input signal to a 10.7 MHz IF. See Figure 11-5 for a detailed block diagram. Note The block diagrams for the A14 and A15 assemblies are located in Chapter 10, "Synthesizer Section." "...
Page 391 For troubleshooting, it is recommended that you use an active probe, such • Caution as an HP 85024A, and another spectrum analyzer. If an HP 1120A Active Probe is being used with a spectrum analyzer having dc-coupled inputs, such as the HP...
Page 392: Automatic Fault Isolation References
Table 11-1. Automatic Fault Isolation References • Manual Procedure to Perform Suspected Circuit Indicated by Automatic Fault Isolation Check 2nd IF Amplifier Third Converter Check 2nd IF Distribution Third Converter Check 10.7 MHz IF Out of Double Balanced Mixer Third Converter Check 300 MHz CAL OUTPUT Calibrator Amplitude Adjustment in Chapter 2 Check A7 1st LO Distribution Amplifier...
Page 393 Table 11-2. TAM Tests versus Test Connectors • Connector Manual Probe Troubleshootin~ Test Measured Signal Lines A14J16 YTF Offset DAC YTF Gain and Offset Input YTF Gain DAC YTF Drive Band Switch Driver A14J17 Main Coil Course DAC A14J18 LODA Drive MS5, MS6, MS7, MS8 A14J19 Second Conv PIN Switch...
Page 394 2. Perform "External Mixer Amplitude Adjustment" in Chapter 2. If this adjustment cannot be completed, perform the "Third Converter" troubleshooting procedure in this chapter. 3. Perform the "First LO Output Amplitude" performance test. (Refer to the HP 8563A Installation and Verification Manual or use TAM functional test).
Page 395 8. If ERR 334 (unlevelled output) occurs and All YTO power output is correct, the A7 LODA drive circuit may be defective. Refer to "A7 LODA (LO Distribution Amplifier)" • in this chapter. 9. Troubleshoot the signal path. Refer to the voltage levels provided on Figure 11-5, Rear-Panel SWP Output.
Page 396 12. If the voltage varies between 0 V dc and -2 V dc, adjust A14R628 GATE BIAS for a • DVM reading within 5% of the GATE BIAS voltage provided on the A7 LODA label. If the voltage does not vary between 0 V dc and -2 V dc, troubleshoot A14 Frequency Control assembly.
Page 397 A9 Input Attenuator 1. Perform the "Input Attenuator Accuracy" performance test in Chapter 3 of the HP 8563A Installation and Verification Manual. 2. If there is a step-to-step error of approximately 10 dB or more, continue with step 3.
Page 398 The logic levels listed in Table 11-3 show the default ac usage (pin 5 low, pin 6 Note • • high). DC usage (pin 5 high, pin 6 low) is not shown. 6. If one or more logic levels listed in Table 11-3 are incorrect, disconnect W11 from A14J6 and repeat step 4 checking only pins 3,5, 11, and 13 of A14U420.
Page 399 Band Low-Pass Filter). 11. Connect a second spectrum analyzer to J2 on A12 RF Switch. Set the analyzer center frequency to 300 MHz. 12. Connect the HP 8563A CAL OUTPUT to the INPUT 50il, then set the controls as follows: CENTER FREQ...
Page 400 A 13 Second Converter • The A13 Second Converter is extremely sensitive to electrostatic discharge Caution (ESD). For further information regarding electrostatic precautions, refer to "Electrostatic Discharge Information" in Chapter 1. 1. Connect the spectrum analyzer CAL OUTPUT to INPUT 50n. 2.
Page 401 • "Synthesizer Section." A7 LODA Drive Refer to function block Z on the A14 Frequency Control Schematic Diagram (sheet 3 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 1. Set the spectrum analyzer controls as follows: CENTER FREQ 300 MHz...
Page 402 • Refer to function block P on A14 Frequency Control Schematic Diagram (sheet 3 of 5) in the HP8560A/8561B/8563A Component Level Information binder. 1. Connect a positive DVM test lead to A14U417 pin 5 and the negative lead to A14J18 pin 2.
Page 403 The Sweep Tune Multiplier takes tune information (YTO start frequency) and sweep (based • on LO span), then multiplies it to make it correct for the activated YTF band. The FAV Generator sample-and-hold switch, U415B, and C31 hold the YTF steady during retraces between multiband sweeps.
Page 404 • M1 VO= 1.29V TO= 00.000$ CH1= 500.mV/Di, TM= 80.0ms/Div Figure 11-3. Rear-Panel SWP Output M1 vo= 0.00uV TO= 00.000$ CH1= 1.50V/Div TM= 50.0ms/Div • Figure 11-4. Signal at A14J15 Pin 1 8. Monitor A14J15 pin 3 with a DVM. For a center frequency of 5 GHz, the voltage should measure -1.33 V dc :f:0.2 V dc.
Page 405: Sweep + Tune Multiplier Values
Table 11-4. Sweep Tune Multiplier Values • Center Frequency A14J15 Pin 3 (V dc) U416A U416B U416C Gain 5 GHz -1.33 Open Closed Closed -2.50 Open Closed Open -3.82 Closed Open Open -5.07 Open Open Open 10. Move the WR PROT/WR ENA jumper on A2 Controller to the WR ENA position. 11.
Page 406 Confirming a Faulty Third Converter 1. Perform the "IF Input Amplitude Accuracy" performance test in the HP 8563A Installation and Verification Manual. This exercises most of the third converter. 2. If the performance test fails, perform the "External Mixer Amplitude Adjustment" in Chapter 2 of this manual.
Page 407 Third Converter Refer to function blocks A, B, C, D, and Eon A15 RF Section Schematic Diagram (sheet 2 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The Third Converter consists of the Second IF distribution, A15Al Second IF Amplifier, double-balanced mixer, 10.7 MHz bandpass filter, and flatness compensation amplifiers.
Page 408 Flatness Compensation Control • Refer to function block G on A15 RF Section Schematic Diagram (sheet 2 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The flatness-compensation control consists of a buffer amplifier (U901B) and two identical voltage-to-current converters (U901A and U901C). The thermistor RT901 in the buffer amplifier provides temperature compensation for the PIN diodes in the attenuator stages.
Page 409 SIG 10 Oscillator Refer to function block F on A15 RF Section Schematic Diagram (sheet 2 of 4) in the HP8560A/8561B/8563A Component Level Information binder. The SIG ID Oscillator generates approximately 298 MHz, which is a shifted third LO, to distinguish true signals from false signals (such as image or multiple responses).
Page 410 Check U305 pin 3 for approximately 12 V dc. c. Check for a 10 MHz sine wave greater than or equal to 1 V p-p at J305 (standard HP 8563A), or at U302 pin 2 with an oscilloscope (Option 103).
Page 411 • 0.000 s 0.00 50.0 ns/div 1.00 Graph !'"\ "'I ri"-'l [Chan U301 PINg • voc Figure 11-5. 10 MHz Reference at A15J302 0.000 s 1.00 V/d i 1.00 50.0 ns/div Graph [Chan A15J302 • • voc Figure 11-6. 10 MHz TTL Reference at U303 Pin 5 •...
Page 412 Table 11-5 lists the RF Section mnemonics shown in Figure 12-7 and provides a brief • description of each . Table 11-5. RF Section Mnemonic Table Mnemonic Description TUNE+,TUNE- YTF Tune Signal YTF Heater Power HTR+,HTR- MAIN COIL+, MAIN COIL- YTO Main Coil Tune Signal FM+, FM- YTO FM Coil Tune Signal...
Page 414 • Display/Power Supply Section The Display/Power Supply Section contains A6 Power Supply, A6A1 HV Module, A17 CRT Driver, and A18 CRT. Figure 12-1 illustrates this section block diagram. Table 12-1 lists signal versus pin numbers for WI Power Cable. Troubleshooting Using the TAM 12-4 Blank Display 12-5...
Page 415 • FRONT PANEL LED POWER SUPPLY -12.6 ASSEMBLY 110/220 VOLTAGE LINE SELECTOR SWITCH LINE (ON REAR PANEL) MODULE IWARN I NG , ...• +19V ,.:0:: "' ..i....WHEN g::~ CRT SUPPLY TROUBLESHOOTING 5 AMP • V1 THE POWER SUPPLY FUSE -15V +15V...
Page 416 Table 12-1. W1 Power-Cable Connections (1 of 2) • Signal A2Jl A3J1 A4Jl A5J1 A6J1- A14J1 A15J1 (pins) (pins) (pins) (pins) (pins) (pins) (pins) AGND AGND AGND SCAN RAMP AGND -12.6 V -15 V AGND -15 V +15 V AGND •...
Page 417 Table 12-1. W1 Power-Cable Connections (2 of 2) • Signal A6J1- A14J1 AISJ1 A2J1 A3J1 A4J1 ASJ1 (pins) (pins) (pins) (pins) (pins) (pins) (pins) +5 V +5 V +28 V LINE TRIGGER +15 V +15 V -15 V -15 V * Indicates signal source connectors.
Page 418 Use the following procedure if the instrument display is blank. This procedure substitutes an HP-IB printer for the display. 1. Connect the HP-IB printer to the spectrum analyzer and set the printer address to the value required by the TAM (which is usually 1).
Page 419 4. The yellow LED next to A2J11 should blink approximately 10 times. If the LED fails to blink correctly, troubleshoot the digital section of A2 Controller assembly. • 5. Move the probe cable to A2J202. Press the first softkey and wait 5 seconds. 6.
Page 420 • FRONT VIEW • -12. 6V: +15V Figure 12-3. Probe Power Socket 3. If all power supply indicators along the outside edge of the A2 Controller assembly are lit, the A6 Power Supply is probably working properly. IIIIIRa, 4. Press [GHz ).
Page 421 6. Turn off the analyzer and place A17 in the service position. Connect the ground lead of a high-voltage probe (HP 34111A) to the chassis. Use the DVM to measure AI7J7(10). 7. The nominal A17J7(10) voltage is -1600 V dc, but the CRT functions if this voltage is •...
Page 422 8. Adjusting A17R34 COURSE FOCUS should vary A17J7(10) voltage by 150 V. If these • voltages are correct, suspect the CRT. 9. Check the A6A1 High Voltage Module cathode supply output at A17TP16 using a high-voltage probe. If the cathode voltage is -2450 V :J:250V, check the Focus Grid Level Shifter.
Page 423 The following measurements should be made with a high-voltage probe, such Note as the HP 34111A. When using the high-voltage probe, connect the ground " lead securely to the spectrum analyzer chassis.
Page 424 Warning The A6 Power Supply and A6A 1 High Voltage Assemblies contain lethal • voltages with lethal currents in all areas. Use extreme care when servicing these assemblies. Always disconnect the power cord from the instrument before servicing these assemblies. Failure to follow this precaution can represent a shock hazard which may result in personal injury.
Page 425 16. Connect a jumper from A6TPI0l to A6TP301. This independently powers the Buck Regulator Control circuitry. • 17. Connect a jumper from +12 V dc to the end of C207 nearest C209. 18. IT the current draw exceeds approximately 50 mA, suspect a short in the Buck Regulator Control circuitry or a shorted CR201.
Page 426 5. If QI02 is shorted, QI03, QI04, CRI06, and CRI08 are also probably shorted. If QI02 is • working properly, measure the resistance between TP102 and TP101 (positive ohmmeter lead to TPI02). 6. If the resistance is less than 1 kil, suspect either Q103 or Q104 in the DC-DC Converter. Supply Restarting Every 1.5 Seconds (Kick-Start) Refer to function blocks G and L of A6 Power Supply Schematic Diagram.
Page 427 • High Voltage Supplies 1. Set the switch OFF, disconnect the power cord, and remove the power supply [LINE) shield. 2. Connect the negative DVM lead to A6TP401 and the positive lead to A6TP405. 3. Set the switch ON. [LINE) 4.
Page 428 3. Connect a voltmeter to TP 405 and set the switch ON. (LINE) • 4. Check TP405 for a voltage of approximately +110 V dc. It probably measures higher since there is no load on the supply. 5. If the voltage at TP405 is correct, suspect a short on A17. If the voltage at TP405 is not correct, check pin U401 pin 8 for a sawtooth signal.
Page 429 R203, R204, U211, and associated circuitry provide feed-forward for U203. This makes the • loop gain independent of input line voltage, which cancels the 120 Hz ripple by more than 10 dB. U202C and its associated circuitry permit the power supply to start up at low-line voltages at low temperatures.
Page 432 Component-Level Information Packets (CLIPs). Each CLIP contains a parts list, component-location diagram, and schematic diagram. Each CLIP has an HP part number which is changed whenever the HP part number for its related instrument assembly is changed.
Page 433 Table A-1. HP 8563A SpeCb'um Analyzer Documented Assemblies • Board Assembly Instrument Assembly CLIP Part Number. Serial Prefix Part Number 08562-90110. AlAI Keyboard 2913A and above 08562-60031 A2 Controller Assembly 2913A through 2925A 08563-60013 08563-90010 2948A through 2949A 08563-60002 08563-90011...
Page 434 Table A.1. • HP 8563A Spectrum Analyzer Documented Assemblies (continued) Board Assembly Instrument Assembly CLIP Part Number- Serial Prefix Part Number A16 CAL OSC 2913A and above 08560-60014 08560-90027- A17 CRT Driver 2913A and above 08562-60039 08562-90114 3032A and above...
Page 435 • Table A-2. RF Board Assemblies Shipped with HP 8563A's Serial Prefixed below 3029A Rl' Board Option Instrument Assembly CLIP Part Number Serial Prefix Part Number A15 RF Board, Standard 2913A through 3009A 08562-60103 08562-90104 3017A through 3027A 08562-60122 08562-90107...
Page 436 • Index A16 CAL oscillator replacement, 3-42 AM/FM demod, audio amplifier, and speaker 12 MHz LPF parts list, 1-17 troubleshooting, 8-38 cal oscillator amplitude range troubleshooting, 8-32 A10 YTF assembly general troubleshooting, 6-39 A10 YTF replacement, 3-33 low-pass filter troubleshooting, 8-38 general troubleshooting, 6-36...
Page 437 jumbled display or trace off-screen troubleshooting, • troubleshooting, A5 IF section keyboard troubleshooting, 9-15 IF signature troubleshooting, 8-21 line generator troubleshooting, step gains troubleshooting, 8-30 long lines/short lines troubleshooting, 9-11 troubleshooting, 8-20 state- and trace-storage troubleshooting, 9-15 A6A1 high voltage assembly A3 interface A6A1 high voltage assembly replacement, A3 interface replacement, 3-15...
Page 438 6-13 programmed ROM error messages 705 to 708, 6-32 RAM check error messages 713 to 719,6-32 remote HP-IB errors (100 to 150), 6-16 packaging, 1-7-8 roller oscillator error messages 321 to 329, packaging part numbers, 1-8 6-20...
Page 439 troubleshooting the synthesizer section, 10-8 • TAM adjustments, 2-9-12 rear frame/rear dress panel replacement, 3-46 adjustment indicators, 2-10 reference designations, value multipliers, and TAM vs. manual adjustments, 2-10 abbreviations, test equipment information, 2-9 related adjustments table, 2-3 test equipment list, 2-10 replaceable parts TAM troubleshooting tests...
Page 440 control latch for band-switch driver problems, A5 IF section problems, 8-20 • A6 general troubleshooting, 6-42 11-13 CRT supply dropping out, 12-14 A6 power supply assembly problems, 12-10 A7 LODA drive problems, 11-12 DC-DC converter control problems, 12-16 A7 LODA general troubleshooting, 6-35 dead power supply, 12-11 detector failures, 8-15...
Page 441 7-25 unlocked roller oscillator PLL, 10-33 reference PLL general troubleshooting, 6-37 unlocked sampling oscillator, 10-40 remote HP-IB errors (100 to 150), 6-16 unlocked YTO PLL, 10-26 resolution bandwidth performance test failures, unlocked YTO PLL problems, 10-24 8-12 user generated error messages 902 to 904,...
Page 442 • W3 line switch W3 line switch cable replacement, 3-50 • • Index-7...
Page 443 HEWLETT HEWLETT HEWLETT PACKARD PACKARD PACKARD • Should one of your HP instruments need Should one of your HP instruments need Should one of your HP instruments need repair, HP service organization repair. HP service organization repair, HP service organization ready to serve you.
Page 444 Service needed Service needed Service needed • DCALIBRATION ONLY DCALIBRATION ONLY D CALIBRATION ONLY D REPAI R REPAI R & CAL D REPAIR REPAIR & CAL D REPAIR REPAIR & CAL OTHER OTHER OTHER Observed symtoms/problems Observed symtoms/problems Observed symtoms/problems FAILURE MODE IS: FAILURE...

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