Comtech EF Data SDM-300L3 - Manual (Page 66)

SDM-300L3 Satellite Modem Revision 1
Connector Pinouts MN/SDM300L3.IOM
3–12
3.2.5 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 3-8 for pinout information.
Table 3-8 . AUX 1 Connector and Pinouts (J9)
Pin # Signal Function Name
1 Satellite Clock - SAT_CLK-
2 External TX Enabled EXT_TX_EN
3 Satellite Clock + SAT_CLK+
4 MODULATOR TTL Fault MDFLTTTL
5 Ground GRN
6 RX_Q RX Q Channel Eye
7 DEMODULATOR TTL Fault DMDFLTTL
8 RX 1 Channel Eye RX_1
9 AGC Output AGC