Comtech EF Data CDM-570A - Manual (Page 74)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Rear Panel Connectors and Pinouts Revision 2
3–12
• A pin that can mute the transmit carrier; this requires that the pin be shorted to ground or a
TTL ‘low’, or that an EIA-232 ‘high’ signal be applied.
• An analog AGC signal (Pin 2) as an aid to antenna pointing or for driving step-track
equipment.
Table 3-6. Alarms Connector Pin Assignments
Pin # Signal Function Name
1 Ground GND
9 EXT Carrier OFF EXT-OFF
2 AGC Voltage (Rx signal level, 0 to 10 volts) AGC
10 No Connection N/C
3 Rx Q Channel (Constellation monitor) RX-Q
11 Rx I Channel (Constellation monitor) RX-I
4 Unit Fault UNIT-COM
12 Unit Fault (Energized, No Fault) UNIT-NO
5 Unit Fault (De-energized, Faulted) UNIT-NC
13 Tx Traffic TX-COM
6 Tx Traffic (Energized, No Fault) TX-NO
14 Tx Traffic (De-energized, Faulted) TX-NC
7 Rx Traffic RX-COM
15 Rx Traffic (Energized, No Fault) RX-NO
8 Rx Traffic (De-energized, Faulted) RX-NC
3.2.3.4 1:1 Control Connector, DB-9F
Use this 9-pin type ‘D’ female connector (DB-9F) to connect the modem only to
a CRS-170A (L-Band) or CRS-180 (70/140 MHz) switch in 1:1 redundancy
configurations.
Table 3-7. 1:1 Control Connector Pin Assignments
Pin # Description Direction
5 Ground ---
9 Fused +12 volt Out
4 Redundancy In 2 In
8 Redundancy Out 2 Out
3 Redundancy In 1 In
7 Redundancy Out 1 Out
2 Receive Serial Data – auxiliary channel In
6 Transmit Serial Data – auxiliary channel Out
1 Ground ---