Bnc Connectors; Overhead Interface Connector (P3A); Table 5-2. Bnc Connectors; Table 5-3. Overhead Interface Connector Pin Assignments - Comtech EF Data CDM-600 Operating Instructions Manual

CDM-600 Satellite Modem
Connector Pinouts
5.2

BNC Connectors

The BNC connectors are located on the rear panel of the modem. Refer to Table 5-2 for
pin assignments.
BNC Connector
RX-IF
TX-IF
EXT REF
IDI
DDO
RX (IDO)
TX (IDI)
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 #
14
2
12
15
11
24
16
3
9
17
19
4
20
23
13
22
8
10
5
6
1
18
21
25
7

Table 5-2. BNC Connectors

Reference
J1
J2
J9
J10A
J11A
J10B
J11B
Signal Function
IDR 64 kbps ESC Tx Data +
IDR 64 kbps ESC Tx Data -
IDR 64 kHz ESC Tx Clock +
IDR 64 kHz ESC Tx Clock -
IDR 1 kHz Tx Octet Clock +
IDR 1 kHz Tx Octet Clock -
IDR 64 kbps ESC Rx Data +
IDR 64 kbps ESC Rx Data -
IDR 64 kHz ESC Rx Clock +
IDR 64 kHz ESC Rx Clock -
IDR 1 kHz Rx Octet Clock +
IDR 1 kHz Rx Octet Clock -
Balanced Ext.Baseband Clock +
Balanced Ext.Baseband Clock -
IBS/D&I ESC RS232 Tx Data
IBS/D&I ESC RS232 Tx Clock
IBS/D&I ESC RS232 Rx Data
IBS/D&I ESC RS232 Rx Clock
IBS Tx High-Rate ESC Data
IBS Rx High-Rate ESC Data
IDR Back Alarm 1 H/W input
IDR Back Alarm 2 H/W input
IDR Back Alarm 3 H/W input
IDR Back Alarm 4 H/W input
Signal Ground
Description
RX-IF signals
TX-IF signals
External Baseband Input
Insert Data Input
Drop Data Output
RX G.703 (Unbalanced)
TX G.703 (Unbalanced)
Signal Name
TX-422DAT-B
TX-422DAT-A
TX-422CLK-B
TX-422CLK-A
TX-OCT-B
TX-OCT-A
RX-422DAT-B
RX-422DAT-A
RX-422CLK-B
RX-422CLK-A
RX-OCT-B
RX-OCT-A
EXT-CLK-B
EXT-CLK-A
TX-232-DATA
TX-232-CLK
RX-232-DATA
RX-232-CLK
TX-ASYNC
RX-ASYNC
BW-IN1
BW-IN2
BW-IN3
BW-IN4
Ground
5–2
Revision 7
MN/CDM600.IOM
Direction
In
Out
In
In
Out
Out
In
Direction
In
In
Out
Out
Out
Out
Out
Out
Out
Out
Out
Out
In
In
In
Out
Out
Out
In
Out
In
In
In
In
-