Operating instructions

DMD50 Universal Satellite Modem Rear Panel Interfaces
TM118 – Rev. 1.1 5-7
15 Backward Alarm Out - 1 NC ESCBWO 1NC N/A
16 Backward Alarm Out - 2 C ESCBWO 2C N/A
17 Backward Alarm Out - 2 NC ESCBWO 2NC N/A
18 Backward Alarm Out - 3 C ESCBWO 3C N/A
19 Backward Alarm Out - 3 NC ESCBWO 3NC N/A
20 Backward Alarm Out - 4 C ESCBWO 4C N/A
21 Backward Alarm Out - 4 NC ESCBWO 4NC N/A
22 Backward Alarm In – 1 ESCBWI 1 Input
23 Backward Alarm In – 3 ESCBWI 3 Input
24 No Connection NC ---
25 No Connection NC ---
5.4.2 64K AUDIO (J2)
The 64K AUDIO Port allows for communications between Earth Stations. It is a 9-Pin Female “D”
Connector that complies with IESS 308. Refer to Table 5-7a for pinouts in audio mode and Table
5-7b for pinouts in 64k mode.
Table 5-7a. 64K AUDIO (In Audio Mode) Port 9-Pin Female “D” Connector (J2)
Pin No. Signal Name Signal Direction
1 Transmit Audio 1A ESCAUDTX 1A Input
2 Receive Audio 1A ESCAUDRX 1A Output
3 Ground GND ---
4 Transmit Audio 2B ESCAUDTX 2B Input
5 Receive Audio 2B ESCAUDRX 2B Output
6 Transmit Audio 1B ESCAUDTX 1B Input
7 Receive Audio 1B ESCAUDRX 1B Output
8 Transmit Audio 2A ESCAUDTX 2A Input
9 Receive Audio 2A ESCAUDRX 2A Output
Table 5-7b. 64K AUDIO (In 64K Mode)) Port 9-Pin Female “D” Connector (J2)
Pin No. Signal Name Signal Direction
1 Send Data A SD-A Input
2 Receive Data A RD-A Output
3 Ground GND ---
4 Synchronous Data Send Timing B ST-B Input
5 Synchronous Data Receive
Timing B
RT-B Output