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GE M
S
EDICAL
YSTEMS
D
2300164-100, R
IRECTION
5-4-6
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.
FE Bus P2
FB, TX, RFT Trig Ps-A25
FB, ATGC P2-B37+
FB P-B35
FB, Probe CTRL P3
All Boards P3-D25
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7
EVISION
Front End Bus
Interface
AGTC
Generator
Test Signal
Generator
P2-D37-
XDCCTRL
Interface
EI Probe
ID/Select
Revision Detect
P3-D26
Figure 5-1: Front End Controller Block Diagram
Chapter 5 - Components and Function (Theory)
V
™ 3 P
/V
™ 3 S
IVID
RO
IVID
System Clock
Generator
VME Bus
VMA Bus
Interface
P IP
CPU
Memory
P3 FB
HV Control
P3 FB
HV Readback
M
ERVICE
ANUAL
5-23
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