Specifications

Configuration SDM-650B Satellite Modem
3–12 Rev. 5
3.2.1.2 Connector Pinouts
The RS-422 and MIL-STD-188-114 interface is provided on a 37-pin female D
connector, accessible from the rear panel of the modem. Screw locks are provided for
mechanical security of the mating connector.
Signal Function Name Pin #
SIGNAL GROUND SG 1, 19, 20, 37
SEND DATA SD-A
SD-B
4
22
SEND TIMING ST-A
ST-B
5
23
RECEIVE DATA RD-A
RD-B
6
24
REQUEST TO SEND RS-A
RS-B
7
25
RECEIVER TIMING RT-A
RT-B
8
26
CLEAR TO SEND CS-A
CS-B
9
27
DATA MODE DM-A
DM-B
11
29
RECEIVER READY RR-A
RR-B
13
31
TERMINAL TIMING TT-A
TT-B
17
35
MOD FAULT
−
3
DEMOD FAULT
−
21
MASTER CLOCK
(INPUT)
MC-A
MC-B
16
34