204ADJUSTING SQUELCHThe purpose of the Squelch it to mute the speaker whenno signals are present. With the squelch level correctlyset, you will hear sound only when actually receivingsignals. The higher the squelch level selected, thestronger the signals must be to receive. The appropriatesquelch level depends on ambient RF noise conditions.Turn the SQL control when no signals are present.Select the squelch level at which the background noiseis just eliminated.The current squelch level is incorrect.The current squelch level is correct.SELECTING A FREQUENCY1 Press [VFO] to select VFO mode.2 To increase the frequency, turn the Tuning controlclockwise or press Mic [UP].To decrease the frequency, turn the Tuning controlcounterclockwise or press Mic [DWN].• Pressing and holding Mic [UP]/ [DWN] causes thefrequency to step repeatedly.• To change frequencies in steps of 1 MHz, press [MHz](Tuning control) first. Pressing [MHz] again cancels thisfunction.• To change frequencies in steps of 10 MHz, press[F]+[MHz] first. Pressing [F] cancels the 10 MHzfunction; pressing [MHz] starts the 1 MHz function.If using a MC-53DM, you can also use its keypad toselect frequencies. See “DIRECT FREQUENCY ENTRY(WITH MC-53DM ONLY)” {page 63}.Noise(Squelch opened)The current squelch level is incorrect.No speaker output(Squelch closed)Audio(Squelch opened)The current squelch level is correct.
