Operating instructions

Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem
5-16 TM103 – Rev. 2.8
10 No Connection --- ---
11 Receive Data B (+) RD-B Output
12 Drop Data Out (-) DDO-A Output
13 Insert Data In (-) EXC (-) IDI-A Input
14 Mod Fault MOD-FLT Open Collector
Output
15 Demod Fault DMD-FLT Open Collector
Output
5.7.5 SWITCH INTERFACE (J5)
The Switch Interface Port is a 68-Pin High-Density Female Connector. Refer to Table 5-10 for
pinouts.
Table 5-10. SWITCH INTERFACE Port 68-Pin High-Density Female Connector (J5)
Pin No. Signal Name Signal Direction
1 G.703 Send Data Input A G.703B SD-A Input
2 Synchronous Data Send
Data Input - A
SYNC SD-A Input
3 IDR ESC Backward Alarm
Out - 1 Common
ESCBWO 1C No Direction
4 G.703 Insert Data Input – A G.703B IDI-A Input
5 Synchronous Data Send
Timing Output – A
SYNC ST-A Output
6 IDR ESC Backward Alarm
Out - 1 Normally Open
ESCBWO 1NO No Direction
7 Synchronous Data Terminal Timing
Input – A
SYNC TT-A Input
8 IDR ESC Backward Alarm
Out - 2 Normally Closed
ESCBWO 2NC No Direction
9 G.703 Drop Data Out A -
Synchronous Data Receive Timing
Output - A
DDO-A RT-A Output
10 IDR ESC Backward Alarm
Output - 3 Common
ESCBWO 3C No Direction
11 G.703 Insert Data Out A -
Synchronous Data Receive Data A
IDO-A RD-A Output
12 IDR ESC Backward Alarm
Output - 3 Normally Open
ESCBWO 3NO No Direction
13 External Clock Input - A BAL EXC-A No Connection
14 Ground GND ---