General Dynamics CG-1220, Operation And Maintenance Manual

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Introduction
1.3 Inputs and Outputs
The inputs and outputs located on the DTR rear panel provide the external
interfaces. The number of inputs varies with user configuration. The DTR rear
panel is shown in Figure 1-2. The function of each input and output is listed in
Table 1-2.
4 3 2 1
6 5
Figure 1-2 DTR Rear Panel
TABLE 1-2 INPUTS AND OUTPUTS
CONNECTOR FUNCTION
1. RF Input: Provides up to 6 selectable inputs for RF signals in the following bands:
Type N Connector 
L-band

S-band

C-band

X-band

Ku-band
Type SMA Connector

Ka-band
2. I/O Interface 1 and 2 Analog Interface and Control ports. Provides analog control and status.
3. RS-232 A standard RS-232 serial port.
4. RS-422 A standard RS-422 serial port. Also configurable as an RS-232 serial port.
5. RS-485 A standard RS-485 serial port.
6. Power Supply Universal power supply accepting 100 – 240 VAC, 50/60 Hz. A fuse is
accessible by pulling out a holder between the switch and the plug. This
holder also contains a spare fuse. The fuse used is a 1A, 250V rated 5mm x
20mm slow-blow snap-in fuse. Littelfuse 239001 or equivalent is
recommended.
The power cord to be used with this unit should be a detachable #18AWG
cord meeting at least 1250W/10A. Volex 17251 10 B1 or equivalent is
recommended.
IMPORTANT: The safety grounding bolt below the input should be
securely connected to the rack ground bar (or adequate earth ground) to
eliminate a potential failure hazard.
1-4 CG-1220 DTR