Using the Attenuator
The attenuator reduces the amount of signal at the receiver input (20 dB) and may help reduce interference from strong nearby transmitters. There are two attenuation modes, Normal and Global. Normal attenuation uses the attenuation settings for each object or search. Global attenuation forces attenuation for all objects, on or off
To Attenuate a Conventional Object press ATT anytime a conventional object is in the display.
To Attenuate a Trunking System press ATT anytime a talkgroup object is in the display.
To Attenuate a Search Object or Dedicated Search press ATT during the search.
To Turn Global Attenuation Mode Off press FUNC then ATT (no G in the display).
To Turn Global Attenuation Mode On press FUNC then ATT (G in the display).
To Turn Global Attenuation On press ATT (GA in the display).
To Turn Global Attenuation Off press ATT (G in the display).
From:
http://new.marksscanners.com/106_197/106_197.shtml#using the attenuator