Figure 3-16. Rs-422 Or V.35 Master Slave Configuration - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem
3.6.1.1 Master/Slave RS-422 or V.35
Refer to Figure 3-16 for the RS-422 or V.35 master/slave configuration.
Notes:
1. The clock may be looped back by using JP10 on the interface board.
2. Refer to Tables 3-1 or 3-2 for more information.
Rev. 5

Figure 3-16. RS-422 or V.35 Master Slave Configuration

RS-422 Clock Loopback
Join RT-A to TT-A
Join pin 8 to pin 17
Join RT-B to TT-B
Join pin 26 to pin 35
Note: By wiring the interface for clock turnaround, the impedance will be
reduced. This generally will cause no problem, providing the cable length to the
final terminal equipment is not excessive. Selecting "no loading" at the terminal
equipment will ensure correct line matching.
V.35 Clock Loopback
Join SCR-A to SCTE-A
Join pin V to pin U
Join SCR-B to SCTE-B
Join pin X to pin Y
Configuration
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