Comtech EF Data CST-5000 - Manual (Page 94)

CST-5000 C-Band Satellite Terminal Theory of Operation
Rev. 9 5–5
COLD/WARM START
HPA FAULT
HPA PWR MON
IF LOCK DET
HPA THERM
U/C LOCK DET
8 BIT PARALLEL BUS
2 BIT SERIAL BUS
SDA/SCL
D/C
U/C
HPA
U/C THERM
FAN FAULT
D/C THERM
D/C TUNING
5V MON
INPUT POWER
U/C SYNTH
EIA-232
EIA-485
TXD/RXD
HPA LVL CNTL
TXD ENABLE
D/C LVL CNTL
COM SUM FAULT
TO LNA 10V
5V
12V
12V MON
D/C SYNTH
U/C AGC
REF OSC ADJ
NO LNA FAULT
LNA CAL
FAN CNTL
U/C ATTEN
NC
REMOTE
CONNECTOR
RF SHUTDOWN
U/C TUNING
U/C LEVEL MON A/D
CONVERTER
EEPROM
PROGRAM
MEMORY
REGULATOR CURRENT
SENSE
REGULATOR
LOCAL
KEYPAD/DISPLAY
(OPTIONAL)
MICROCONTROLLER
INPUT
PORT
OUTPUT
LATCHES
SERIAL
REMOTE
COMM
D/A
CONVERTERS
PORT
LATCHES RELAY
IF TUNING
D/C LOCK DET
Figure 5-3. M&C Functional Block Diagram