Comtech EF Data SDM-650B - Manual (Page 49)

SDM-650B Satellite Modem Configuration
Rev. 5 3–7
3.2 Digital Interfaces
3.2.1 RS-422 and MIL-STD-188-114 Interface
3.2.1.1 Functional Description
The RS-422 and MIL-STD-188-114 digital interface (Figure 3-2) provides the level
translation, buffering, and termination between the internal modem signals and the
RS-422 or MIL-STD-188-114 interface connector on the rear panel. A functional block
diagram of the interface is shown in Figure 3-3.
RS 422
JP2
JP12
JP13
JP14
JP15
ASSEMBLY AND
REVISION NUMBER
JP1
ADDRESSING SELECT JUMPERS
JP16
JP9 RS-422/MIL-188
ADAPTOR CONNECTOR
JP3
JP8
JP10
Figure 3-2. RS-422 and MIL-STD-188-114 Interface Board