Comtech EF Data SDR-54A - Manual (Page 26)

SDR-54A Satellite Demodulator Revision 4
External Connectors MN/SDR54A.IOM
3.1.3.2 Front Panel Connector Pinout
The M&C port is provided on a 9-pin female D connector. Screw locks are provided for
mechanical security of the mating connector. This connector is a DCE interface. Pinouts are
described in Table 3-5:
Table 3-5. Front Panel Connector Pinouts
Pin # Signal Function Name
1 +5 VDC at 100 mA +5
2 Receive data output (RS-232-C) RX
3 Transmit data input (RS-232-C) TX
5 Ground GND
*7 Request to send input (RS-232-C) RTS
*8 Clear to send output (RS-232-C) CTS
9 AGC Analog 0 to 5 VDC at 10 mA AGC
*Note: RTS and CTS are internally connected together.
3.1.4 Data Out Connector (J4) Interface Type Jumpers
The J4 port is the interface between the demodulator and the user’s terrestrial equipment.
This port may be configured internally as an RS-232 or RS-422 interface, as required, by
removing the modem cover and positioning the jumpers of JP3 (Figure 3-3), as follows:
OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN JUMP JUMP JUMP JUMP JUMP JUMP JUMP JUMP
EIA-422 EIA-232
1 1
2 2 16 16
15
15
Figure 3-3. Interface Type Jumper Location (JP3)
Notes:
1. If optional DEMUX 2/4 PCB is installed, position jumpers for RS-422 operation.
2. If optional DEMUX 8-Channel PCB is installed, refer to Chapter 5.
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