Specifications; Overall Descr Iption; Channel Capacity; Ctcss - RF Technology Eclipse Series Operation And Maintenance Manual

7

SPECIFICATIONS

7 SPECIFICATIONS
7.1 Over all Descr iption
The transmitter is a frequency synthesized, narrow band FM unit, normally used to drive a 50
watt amplifier. It can also be used alone in lower power applications.
Various models allow 2-25W of output power to be set across a number of UHF frequency
bands. All necessary control and 600Ω line interface circuitry is included.
7.1.1

Channel Capacity

Although most applications are single channel, it can be programmed for up to 100 channels,
numbered 0 - 99. This is to provide the capability of programming all channels into all of the
transmitters used at a given site. Where this facility is used in conjunction with channel-
setting in the rack, exciter modules may be "hot-jockeyed" or used interchangeably. This can
be convenient in maintenance situations.
7.1.2

CTCSS

Full EIA sub-tone capability is built into the modules. The CTCSS tone can be programmed
for each channel. This means that each channel number can represent a unique RF and tone
frequency combination.
7.1.3 Channel Pr ogr amming
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. Micr opr ocessor
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.
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RF Technology T800
7.1 Overall Description
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