Operating instructions

RF Technology T350/T500 Page 20
7.1.3 Channel Programming 7 SPECIFICATIONS
7.1.3 Channel Programming
The channel information is stored in non-volatile memory and can be programmed via
the front panel test connector using a PC and RF Technology software.
7.1.4 Channel Selection
Channel selection is by eight channel select lines. These are available through the rear
panel connector. Internal presetting is also possible. The default (open-circuit) state is to
select channel 00.
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.
7.1.5. Microprocessor
A microprocessor is used to control the synthesizer, tone squelch, PTT function and
facilitate channel frequency programming. With the standard software, RF Technology
modules also provide fault monitoring and reporting.
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
External ALC - Green LED
External Reference - Green LED