Comtech-ef-data LCS-4 Instrukcja Użytkownika Strona 28

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LCS-4 L-Band Combiner Switch Revision 1
Connector and Pinouts MN/LCS4.IOM
3–4
3.5 (FUTURE OPTION) MODULATOR FAULTS AND TX ON/OFF
CONNECTOR
Use of this connector is optional. It permits control of two 1:1 modulators by sensing the fault
status from the 1:1 modem pair.
Pin # Signal Name Signal
Direction
Description
1
2
MOD1_FLT
MOD2_FLT
I
I
Modulator 1 TTL Fault Input
Modulator 2 TTL Fault Input
3
4
MOD3_FLT
MOD4_FLT
I
I
Modulator 3 TTL Fault Input
Modulator 4 TTL Fault Input
5 GND GND Ground
6 MOD1_TX_CNTRL O Turns Modulator 1 TX Carrier OFF TTL_OC Output
7 MOD2_TX_CNTRL O Turns Modulator 2 TX Carrier OFF TTL_OC Output
8 MOD3_TX_CNTRL O Turns Modulator 3 TX Carrier OFF TTL_OC Output
9 MOD4_TX_CNTRL O Turns Modulator 4 TX Carrier OFF TTL_OC Output
Notes:
1. Inputs not exceed +5 VDC or less than 0 VDC.
2. Outputs are TTL Open Collector and require an external pull-up resistor.
3. Fault is indicated by TTL high level. OK (NO LEVEL) is indicated by TTL Low Level.
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