Comtech EF Data SDM-300A - Manual (Page 385)

SDM-300A Satellite Modem Revision 6
Specifications MN/SDM300A.IOM
19–29
19.9.3 V.35 Specification V.10, V.11 Specification, Circuit Supported
V.35 Specification V.10, V.11 Specification, Circuit Supported
Circuit Supported
SD, SCT, SCTE, RD, SCR, DSR, RLSD, RTS, CTS,
MC, DSR, LL
Driver Amplitude (RD, SCR, SCTE, CTS,
RLSD, DSR, SCTE)
± 0.5V-PK, ± 20% differential, into 100Ω
Amplitude (SCT, SD, RTS, LL, MC) ± 0.2V Minimum into 100Ω
Polarity (SD, SCT, SCTE, RD, SCR) True when B positive with respect to A
False when A positive with respect to B
Polarity (RTS, CTS, DSR, RLSD) True when < -0.2V with respect to ground
False when > +0.2V with respect to ground
Phasing (SCTE, SCR) False-to-True transition nominally in center of data bit
Symmetry (SCT, SCTE, SCR) 50%, ± 5%
Circuit Assignments
SD-A, SD-B Send Data
SCT-A, SCT-B Serial Clock Transmit
RD-A, RD-B Receive Data
SCR-A, SCR-B Serial Clock Receive
SCTE-A, SCTE-B Transmitter Signal Timing
MC-A, MC-B Master Clock
RTS Request to Send
CTS Clear to Send
DSR Data Set Ready
RLSD Receive Line Signal Detect
LL Local Loopback
MF Mod Fault (ttl)
DF Demod Fault (ttl)