Figure 8-10. Nud7120A Frequency Generation Unit (Vco) Circuit – 2 Of 2 - Motorola APX 5000 Service Manual
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8-12
TP853
TEST_POINT
IN
DC_LIN_1_5V
IN
DC_SUPER_FILTER_5V
IN
DC_LIN_5V
DIG_CTRL_TR
IN
DIG_CTRL_E
IN
DIG_CTRL_F
IN
R764
1.2K
ANA_CHARGE_PUMP
IN
C762
C766
.039UF
6800PF
R759
680
R767
ANA_ADAPT_CHARGE_PUMP
68
IN
C760
C763
C765
C768
C770
.082UF
.082UF
.082UF
.082UF
.082UF
C783
2200PF
R761
C759
270
.22UF
R762
11K
RF_HP_MOD_OUT
IN
DIG_CTRL_VTUR1
IN
DIG_CTRL_UR2
IN
DIG_CTRL_VR
IN
DIG_CTRL_78T
IN
DIG_CTRL_D
IN
DIG_CTRL_C
IN
Figure 8-10. NUD7120A Frequency Generation Unit (VCO) Circuit – 2 of 2
ANA_VTUNE
C769
C703
.016UF
100PF
DNP
DC_LIN_1_5V
DC_SUPER_FILTER_5V
C791
C796
0.1UF
100PF
7
1
VTUNE
POUT
DIG_CTRL_VTUR1
3
4
SEL1
NC
NC
5
SEL2
DIG_CTRL_UR2
Y704
V0225AZ
U709
309MHZ/379MHZ
SKY13251
4
3
RF1
V1
5
6
NC
RF2
V2
8
7
RF3
V3
1
RFC
DC_SUPER_FILTER_5V
C792
C795
0.1UF
100PF
7
1
VTUNE
POUT
DIG_CTRL_VR
3
4
NC
SEL1
NC
5
SEL2
DIG_CTRL_78T
Y707
V0225AZ
266MHZ/809MHZ
U710
SKY13251
3
4
V1
RF1
NC
6
5
V2
RF2
7
8
V3
RF3
1
RFC
RF_ESCORT
OUT
C799
100PF
C801
6.8PF
RF_ESCORT_DIV2_NONINV
R710
200
IN
L802
C798
33NH
1000PF
C800
C803
R709
R711
22PF
22PF
68
68
L806
R811
39
390NH
R819
C814
C816
L817
R809
1000PF
33PF
390NH
270
5.6K
R807
22K
Q712
2
5
Q712
R813
C709
R705
BC858CD
680
BC858CD
10
220PF
C820
220PF
R808
C701
R812
C813
R708
82K
82
220PF
1PF
Q713
100
NE662M04
R818
4
8.2
3
C810
R815
24
C704
220PF
62PF
DC_LIN_1_5V
L701
R773
390NH
5.6K
C771
R772
C775
C777
100PF
33
Q774
2
1000PF
33PF
NE68519
C779
100PF
R776
39
R778
180
Schematics, Boards Overlays, and Parts Lists: Transceiver (RF) Boards: VHF
C831
R713
100PF
10
Q714
R712
R714
NTZD3154N
560
560
1
6
2
5
NC
3
4
NC
NC
DC_LIN_1_5V
R832
15
L821
390NH
C838
C844
L846
R849
R827
1000PF
47PF
390NH
560
6.2K
R822
20K
Q703
Q703
C851
2
5
BC858CD
BC858CD
220PF
R823
C702
R833
220PF
56K
Q842
100
NE662M04
C830
R840
220PF
15
4
3
TP780
TEST_POINT
RF_PRESCALAR
TL_RX_LO
OUT
R848
C836
R716
0
TL_TX_LO
15
47PF
OUT
R717
R701
R715
0
0
100
DNP
DNP
OUT
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