Specifications

Technical Manual Installation and Operation

RELM/

BK RADIO

Examples of incorrect, observed waveforms are as follows:

Figure 7-1 Under (increase level) Figure 7-2 Over (decrease level)

The waveform when correctly aligned should look as follows:

Figure 7-3 Correctly Aligned Waveform

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 ‘Factory default

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: