Operating instructions

Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem
5-14 TM103 – Rev. 2.8
24 No Connection NC ---
25 No Connection NC ---
5.7.2 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
6 Send Data B SD-B Input
7 Receive Data B RD-B Output
8 Synchronous Data Send Timing A ST-A Input
9 Synchronous Data Receive
Timing A
RT-A Output