Utility Connector Group; J1 | Alarm Connector, Db-15M - Comtech EF Data CDM-760 Installation And Operation Manual

Rear Panel Connections
CDM-760 Advanced High-Speed Trunking Modem

3.2.2 Utility Connector Group

3.2.2.1

J1 | ALARM Connector, DB-15M

The connector pinouts are as follows:
Pin # Name
1 GND
9 EXT-OFF
2 AGC (NOT AVAILABLE)
10 N/C
3 RX-Q
11 RX-I
4 UNIT-COM
12 UNIT-NO
5 UNIT-NC
13 TX-COM
6 TX-NO
14 TX-NC
7 RX-COM
15 RX-NO
8 RX-NC
The J1 | ALARM 15-pin Type 'D' male (DB-15M) connector provides the unit
alarms interface.
Signal Function
Ground
Ext Carrier Off, active low.
Capability to mute modem's Tx IF (Low=Mute) (Has internal pull-up in the
Modem). Compatible with LVTTL or relay pull down.
AGC Voltage (Rx signal level, 0 to 10 volts, monotonic)
No Connection
Rx Q Channel (Constellation monitor)
Rx I Channel (Constellation monitor)
Unit Fault
Unit Fault (Energized, No Fault)
Unit Fault (De-energized, Faulted)
Tx Traffic
Tx Traffic (Energized, No Fault)
Tx Traffic (De-energized, Faulted)
RX Traffic
Rx Traffic (Energized, No Fault)
Rx Traffic (De-energized, Faulted)
3–6
Revision 4
MN-CDM760
Direction (I/O)
Gnd
I
O
–
O
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O