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Technical Manual
Examples of incorrect, observed waveforms are as follows:
Figure 7-1 Under (increase level)
The waveform when correctly aligned should look as follows:
Choose 'OK' to accept the changes made. This then saves the changes that you have
made to the radio.
After balancing and setting the correct peak deviation is necessary to align the
reference oscillator and re-check the deviation alignment, as the reference oscillator
alignment affects the deviation. This may require running through the deviation
alignment again after the oscillator alignment procedure.
7.1.10 TX Centre Frequency Alignment
The reference oscillator alignment is used to set the correct centre frequency for each
channel. This can be done on a per channel basis or all channels can be set at once.
Oscillator alignment is done using a digital potentiometer adjustment through the
Built in menu system. To carry out this procedure the transmitter output needs to be
connected to a RF test set displaying the frequency error. This procedure should be
done after the deviation alignment procedure has been done. Transmitter modulation
we be disabled.
Now select either to 'Align current channel (Individual)' OR
alignment (All Channels)' Select Tx Reference Oscillator and Output Power and
follow the in built menus instructions. Alter the Reference Oscillator Frequency
potentiometer until the channel is "on frequency". Choose 'enter' to accept the
changes made. This then saves the changes that you have made to the radio.
7.1.11 Microphone Line Input Level (Nominal Deviation
Or Peak Deviation Mode)
The required nominal deviation or Peak deviation is dependent on whether the radio is
narrow or wide. The following table lists the required level for each case:
RELM/
BK RADIO
Figure 7-3 Correctly Aligned Waveform
Installation and Operation
Figure 7-2 Over (decrease level)
'Factory default
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