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CDM-600 Satellite Modem Revision 7
Connector Pinouts MN/CDM600.IOM
5–2
5.2 BNC Connectors
The BNC connectors are located on the rear panel of the modem. Refer to Table 5-2 for
pin assignments.
Table 5-2. BNC Connectors
BNC Connector Reference Description Direction
RX-IF J1 RX-IF signals In
TX-IF J2 TX-IF signals Out
EXT REF J9 External Baseband Input In
IDI J10A Insert Data Input In
DDO J11A Drop Data Output Out
RX (IDO) J10B RX G.703 (Unbalanced) Out
TX (IDI) J11B TX G.703 (Unbalanced) In
5.3 Overhead Interface Connector (P3A)
The overhead interface connector is a 25-pin male D interface located on the rear panel of the
modem. Refer to Table 5-3 for pin assignments.
Table 5-3. Overhead Interface Connector Pin Assignments
Pin # Signal Function Signal Name Direction
14 IDR 64 kbps ESC Tx Data + TX-422DAT-B In
2 IDR 64 kbps ESC Tx Data - TX-422DAT-A In
12 IDR 64 kHz ESC Tx Clock + TX-422CLK-B Out
15 IDR 64 kHz ESC Tx Clock - TX-422CLK-A Out
11 IDR 1 kHz Tx Octet Clock + TX-OCT-B Out
24 IDR 1 kHz Tx Octet Clock - TX-OCT-A Out
16 IDR 64 kbps ESC Rx Data + RX-422DAT-B Out
3 IDR 64 kbps ESC Rx Data - RX-422DAT-A Out
9 IDR 64 kHz ESC Rx Clock + RX-422CLK-B Out
17 IDR 64 kHz ESC Rx Clock - RX-422CLK-A Out
19 IDR 1 kHz Rx Octet Clock + RX-OCT-B Out
4 IDR 1 kHz Rx Octet Clock - RX-OCT-A Out
20 Balanced Ext.Baseband Clock + EXT-CLK-B In
23 Balanced Ext.Baseband Clock - EXT-CLK-A In
13 IBS/D&I ESC RS232 Tx Data TX-232-DATA In
22 IBS/D&I ESC RS232 Tx Clock TX-232-CLK Out
8 IBS/D&I ESC RS232 Rx Data RX-232-DATA Out
10 IBS/D&I ESC RS232 Rx Clock RX-232-CLK Out
5 IBS Tx High-Rate ESC Data TX-ASYNC In
6 IBS Rx High-Rate ESC Data RX-ASYNC Out
1 IDR Back Alarm 1 H/W input BW-IN1 In
18 IDR Back Alarm 2 H/W input BW-IN2 In
21 IDR Back Alarm 3 H/W input BW-IN3 In
25 IDR Back Alarm 4 H/W input BW-IN4 In
7 Signal Ground Ground -