Uniden GPS105 - Manual (Page 14)

2. Think of the Squelch control as a gate. If you turn SQUELCH
fully clockwise it raises the "Squelch Gate" so
that no signals get through.
3. If you turn the SQUELCH fully counter clockwise, it lowers the
"Squelch Gate" so that everything gets through - noise,
weak signals and strong signals.
4. To set the "Squelch Gate" to the desired level, turn SQUELCH
counter clockwise until you hear noise. Then turn the SQUELCH
clockwise just until the noise stops. Now only strong and medium
signals get through.
1. To turn the unit ON, rotate VOL knob clockwise. Adjust volume to a comfortable level.
SETTING THE SQUELCH
7
UHF CB - OPERATION
All UHF-CB functions are only available when in UHF-CB mode.