Connector Pinouts; Specification - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem

3.2.3.2 Connector Pinouts

The DS-1 interface is provided on a 15-pin female D connector accessible from the
modem rear panel. Screw locks are provided for mechanical security of the mating
connector.
SEND DATA
RECEIVE DATA
MASTER CLOCK
MODULATOR FAULT
DEMODULATOR FAULT
GROUND

3.2.3.3 Specification

Circuits Supported
Data Rate
Pulse Width (RD)
Line Code
RD Amplitude
SD Amplitude
Jitter Attenuation (SD)
Modulator Fault
Demodulator Fault
Rev. 5
Signal Function Name
MC-A
MC-B
SD, RD, MOD FAULT, DEMOD FAULT
1.544 Mbit/s
324,
AMI or B8ZS (selectable)
2.75,
3,
Meets AT&T Publication 62411 specification
Open collector output
15V max
20 mA current sink
Fault is open circuit
Open collector output
15V max
20 mA current sink
Fault is open circuit
Pin #
SD-A 1
SD-B 9
RD-A 3
RD-B 11
7
8
---- 14
---- 15
GND 2, 4
± 100 bit/s
± 50 ns
0.25V pk into a 100Ω termination
±
1.5V pk into a 100 termination
± Ω
Configuration
3–23