Comtech EF Data SDM-2020 - Manual (Page 146)

SDM-2020 Satellite Modulator Revision 7
Data Interfaces MN/SDM2020M.IOM
11-11
Table 11-3. Auxiliary Connector, J5
Signal Function Name Pin # Type Comment
1 GND Signal Ground
Demodulator Fault
Indicator DF 2 O Demodulator Summary Fault
Redundancy switch application, TTL open collector
output
Not Used N/A 3,5,8,9 N/A Wire to spare pad
RTS, TX OFF 4 I Modulator, TTL input
Modulator Fault Indicator MF 6 O Modulator Summary Fault
Redundancy switch application, TTL open collector
output
Carrier Detect CD 7 O Demodulator, TTL output
11.1.8 M
ODULATOR
I
NTERFACE
The physical interface to the modulator is a 96-pin DIN connector. The interface data
transfer format is 187 byte (No Framing) Parallel Format.
11.1.9 P
OWER
R
EQUIREMENTS
The G.703 interface requires +5 VDC ( ± 0.25V), +12 VDC (± 0.50V) and -12 VDC
( ± 0.50V) supplied from the base modulator. The power is supplied through the 96-pin
(DIN) connector. During normal operation, the unit requires a maximum of 1A at
+5 VDC, 100mA at +12V, and 50mA at -12V.
11.1.10 G.703 I
NTERFACE
F
RONT
P
ANEL
M
ENUS
The applicable menus are dependent on the G.703 interface application. Refer to Chapter
5
.
11.1.11 G.703 R
EMOTE
I
NTERFACE
C
OMMANDS
The applicable remote commands are dependent on the G.703 interface application. Refer
to Appendix A.