Comtech EF Data SDM-2020 - Manual (Page 189)

SDM-2020 Satellite Demodulator Revision 4
SMPTE-310M Data Interface MN/SDM2020D.IOM
12–7
12.1.3.5.2 Auxiliary Interface Connector – J5
This port provides input/output of the modem-specific signals. The connector is 9-pin
subminiature D female, with threaded jack nuts. Refer to for connector pinouts.
Table 12-3. Auxiliary Interface Connector –J5
Auxiliary Connector Pinout
Signal Function Name Pin # Type Comment
1 GND Signal Ground
Demodulator Fault
Indicator DF 2 O Demodulator Summary Fault. Open
Collector. Redundancy switch
appplication
3 N/C
Request to Send RTS 4 I Modulator Request to send. TX
control. TTL
5 N/C
Modulator Fault
Indication MF 6 O Modulator Summary Fault. Open
collector. Redundancy switch
application.
Carrier Detect CD 7 O Demodulator. Carrier detect. TTL
Legend: O = Output
I = Input
N/C = No Connection
12.1.4 SMPTE-310M/SSI Defaults
Refer to (Table 12-4) for default settings for the interface.
Table 12-4. Interface Defaults
Interface Defaults
RTS Control Off
RTS State Normal
Data or Clock Polarity Normal
Frame Format 188
Loss of Data Alarm
Clock/Data SYNC Correlate on data
12.1.5 SMPTE-310M/SSI Interface Front Panel Menus
Refer to Function Select: Utility: Interface menu.