Operating instructions

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code containing the selected DCS code word will be generated continuously after the
exciter is keyed up.
7.1.4 Channel Programming
The channel information is stored in non-volatile memory and can be programmed via
the front panel connector using a PC, and/or RF Technology software.
7.1.5 Channel Selection
Channel selection is by eight channel select lines connected to the rear panel that
mounts on the rear DB25 female connector.
A BCD active high code applied to the lines selects the required channel. This can be
supplied by pre-wiring the rack connector so that each rack position is dedicated to a
fixed channel. Alternatively, thumb-wheel switch panels are available.
By redefining “illegal” BCD codes, users can also encode channels from 100 – 255.
7.1.6 Microprocessor
A microprocessor is used to control the synthesizer, tone squelch, PTT functions,
external reference monitoring, calibration, fault monitoring and reporting, output power
level control, volume adjustment, line selection, option setting, and facilitate channel
frequency programming.
7.2 Physical Configuration
The transmitter is designed to fit in a 19 inch rack mounted sub-frame. The installed
height is 4 RU (178 mm) and the depth is 350 mm. The transmitter is 63.5 mm or two
Eclipse modules wide.
7.3 Front Panel Controls, Indicators, and Test Points
7.3.1 Controls
Transmitter Key - Momentary Contact Push Button
Line Input Level - screwdriver adjust multi-turn pot
7.3.2 Indicators
Power ON - Green LED
Tx Indicator - Yellow LED
Fault Indicator - Flashing Red LED
7.3.3 Test Points
There are no front panel test points. All important test points are monitored by the
firmware.
7.4 Electrical Specifications
7.4.1 Power Requirements
Operating Voltage - 16 to 32 Vdc
Current Drain – 0.33A
Maximum, typically 0.32A
Standby
Polarity - Negative Ground