Comtech EF Data SDM-300L - Manual (Page 38)

SDM-300L Satellite Modem Installation
Rev. 2 2–17
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 2-9 for pinout information.
Table 2-9. 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 RX Q Channel Eye
7 DEMODULATOR TTL Fault
8 RX 1 Channel Eye RX_1
9 AGC Output AGC