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GE M
S
EDICAL
YSTEMS
D
FK091075, R
IRECTION
5-4-8
Front End Controller Board (FEC)(RFT)
The Front End Controller (FEC) Board controls other boards in the Front End Crate. The control is done
through a synchronous and bidirectional Bus called the Front End Bus. The following tasks are
performed by the FEC Board:
•
System master clock generation (including clock to IP).
•
Transmitter control.
•
ATCG control.
•
Receive focusing control.
•
Analog test signal control.
•
Probe sensing.
•
Transmit voltage control.
•
Control of Front Board switching.
•
Temperature sensing for the TEE probes.
•
Memory refresh control for the BF Board.
•
Provide 40 MHz clock to IP.
FB, TX, RFT Trig Ps-A25
FB, ATGC P2-B37+
FB, Probe CTRL P3
All Boards P3-D25
5-22
04
EVISION
FE Bus P2
Front End Bus
Generator
Test Signal
Generator
P2-D37-
FB P-B35
XDCCTRL
Revision Detect
P3-D26
Figure 5-1: Front End Controller Block Diagram
Section 5-4 - Front End
Interface
AGTC
Interface
EI Probe
ID/Select
V
3N P
/E
IVID
RO
XPERT
System Clock
Generator
VME Bus
VMA Bus
Interface
P IP
CPU
Memory
P3 FB
HV Control
P3 FB
HV Readback
S
M
ERVICE
ANUAL
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