Adjustments
7-22 HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual
Mute adjustment
108-04966
Mute is located on the Microprocessor and Audio PCB.
Adjusting the Mute
q Connect the transceiver to an antenna (a short length of wire will do).
q Select an unoccupied channel.
q Press Voice Mute to enable the audio mute.
q Commence with preset potentiometer R357 fully clockwise. Slowly rotate
the control counter–clockwise until the mute gate closes and the receiver
noise is heard in the loudspeaker (mute threshold).
q Rotate the control back in a clockwise direction a quarter turn.
The mute should now be sensitive enough to operate on the weakest signal
without false triggering on noise pulses. The sensitivity may be varied from
this setting to suit individual requirements (counter–clockwise to increase
sensitivity).
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