User's Manual

RF
Technology T350/T500
Page 17
7 SPECIFICATIONS
7 SPECIFICATIONS
7.1 Overall Description
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 600W
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 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.