BW Broadcast technical manual
Page 29
Installation and setup
FREQUENCY FINE TUNE ( WARNING, ADVANCED TECHNICIANS ONLY)
While the frequency is controlled by the phase locked loop system, the stability is governed by the stability of the
reference. A quartz crystal is used for the reference for its high stability however component ageing can affect the
frequency slightly over time. The frequency can be finely adjusted via VC2. This provides a small adjustment of
the VCO frequency when locked. This will have been adjusted at factory to the correct setting and the transmit-
ter should remain within 1kHz of the channel required. If however the frequency does move off slightly due to
component ageing then you can adjust VC2 to trim the unmodulated carrier back onto channel. You will need a
frequency counter to monitor the output frequency of the un modulated transmitter when adjusting VC2.
LCD SYSTEM METERING ACCURACY
DISPLAY Measurement Accuracy
POWER SUPPLY Volts +/-1 Volt
TEMPERATURE Degrees Centigrade +/-1 Degree
PEAK DEVIATION kHz +/-1 kHz
LIMITER GAIN REDUCTION Decibels +/-1 dB
RF POWER Watts 5 %
To Next Page
Loading...
