Comtech EF Data SDM-2020 - Manual (Page 137)

SDM-2020 Satellite Modulator Revision 7
Data Interfaces MN/SDM2020M.IOM
11-2
J5
RS
MF
RR (CD)
AUXILIARY
DF
SD IN
G.703
75
Ω
J3
G.703
RECOVERY
CLK AND DATA
PROCESSING
AND
CONTROL
EXT CLK
75 Ω
J6
RD OUT
G.703
75
Ω
J4
G.703
DRIVER
CLK AND DATA
DC
POWER
MODULATOR/
DEMODULATOR
INTERFACE
M&C
LOOPBACK
Figure 11-1. G.703 Interface Block Diagram
The 96-pin DIN connector facilitates the interface to the internal circuitry of the
modulator/demodulator. This connector provides for data flow, control, status, and power
between the modulator/demodulator, and the G.703 data interface module (Figure 11-2).
Operation of the Local Front Panel or Remote Control Port (EIA-232/EIA-485) provides
status monitoring of the G.703 data interface.