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Auxiliary 1 connector and pinouts (j9), 4 auxiliary 1 connector and pinouts (j9) – Comtech EF Data SNM-1000 User Manual

Page 40

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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