Comtech EF Data SNM-1000 - Manual (Page 40)

SNM-1000 Node Control Modem Revision 3
Installation MN/SNM1000.IOM
2–8
2.3.4 Auxiliary 1 Connector and Pinouts (J9)
The auxiliary 1 (AUX 1) connector provides:
• MOD and DEMOD (TTL) faults
• Satellite
clock
• Satellite
I&Q
• Automatic Gain Control (AGC) output voltage
The faults are open collector levels that indicate a modulator or demodulator failure. A logic
“1” indicates the faulted condition.
AGC_OUT is a programmable voltage, 0 to 10V, for a receive signal level between -25 and
-60 dBm.
AUX 1 connection is a 9-pin female D connector (J9) located on the rear panel of the
modem. Screw locks are provided for mechanical security on the mating connector. Refer to
Table 2-4 for pinout information
Table 2-4. AUX 1 Connector and Pinouts (J9)
Pin # Signal Function Name
1 Satellite Clock - SAT_CLK-
2 No Connection NC
3 Satellite Clock + SAT_CLK+
4 MODULATOR TTL Fault MDFLTTTL
5 Ground GRN
6 RX Q Channel Eye RX_Q
7 DEMODULATOR TTL Fault DFFLTTTL
8 RX 1 Channel Eye Rx_1
9 Agc Output AGC