Comtech EF Data SDM-300L - Manual (Page 39)

Installation SDM-300L Satellite Modem
2–18 Rev. 2
Alarms Connector and Pinouts (J10)
The alarm connector provides Form C contact closures for alarm reporting. The two
Form C summary fault contacts are Modulator and Demodulator.
The alarm connection is a 9-pin female D connector (J10) located on the rear panel of the
modem. Screw locks are provided for mechanical security on the mating connector. Refer
to Table 2-10 for pinout information.
Table 2-10. Alarms Connector and Pinouts (J10)
Pin # Signal Function Name
1 Alarm 1 is faulted NO
2 COM
3 Alarm 1 is not faulted NC
4 Alarm 2 is faulted NO
5 COM
6 Alarm 2 is not faulted NC
7 Alarm 3 is faulted NO
8 COM
9 Alarm 3 is not faulted NC
•
Alarm 1 = Not used
•
Alarm 2 = TX
•
Alarm 3 = RX
RF Output Connector (CP1)
70/140 MHz Configuration CP1 is a BNC connector for the TX IF signal. The output impedance is
75
Ω
and the output return loss is
≥
_20 dB. In normal operation, the
output will be a QPSK (Optional: OQPSK) or BPSK modulated result of
the Data I/O connector between 50 and 180 MHz, in 1 Hz steps.
L-Band Configuration CP1 is a Type N connector for the TX IF signal. The output impedance
is 50
Ω
and the output return loss is
≥
-15 dB. In normal operation, the
output will be a QPSK (Optional: OQPSK) or BPSK modulated result of
the Data I/O connector between 950 to 1750 MHz, in 100 Hz steps.