BW Broadcast technical manual
Page 4
Introduction
1.1 TX 150/300 FM TRANSMITTER
The BW Broadcast TX 150/300 is a high specification FM broadcast transmitter. Its broadband “no-tune” design
allows 87.5-108 MHz operation from internal direct reading rotary switches or the front panel LCD frequency con-
trol system if enabled. Digital PWM techniques provide an easily adjustable and accurate automatic level control-
led R.F. output of the MOS-FET power amplifier stage.
RF, audio and other parameters are shown on the LCD graphics display. This display offers a very easy method
of transmitter parameter monitoring and a new level of ease for setup and installation, with metering accuracy
normally only found on expensive test equipment. Local and remote personal computer control and metering are
achievable via RS232 interface and there's an alarm I/O as well.
The FM modulator section employs a dual speed “virtual VFO” system for extremely low audio distortion and
excellent stereo performance.
A built in high specification stereo encoder provides crystal clear stereo sound and combined with the internal lim-
iter a fully compliant “plug and play” all in one low power broadcast transmitter.
For future compatibility all settings are switchable with on board jumpers. The stereo and/or limiter settings can be
switched in and out to suit the requirements of any external broadcast equipment you may have now and in the
future.
The lightweight universal mains input design ensures a high reliability efficient design compatabile with any mains
system in the world.
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