AM — the scanner uses AM (amplitude modulation) for the frequency band. FM — the scanner uses FM (frequency modulation) for the frequency band. NFM — the scanner uses narrowband FM for the frequency band.
WFM — the scanner uses wideband FM for the frequency band.
WFM (Broadcast) — the scanner uses FM Broadcast for the frequency band.
Setting Attenuation
Turn on this setting if you are near other strong signal sources. Attenuation sometimes helps to reduce interference and desensitization that strong signals create.
[MENU] Srch/CloCall Opt 
Set Attenuator
This setting controls the attenuator for Quick Search and Close Call operation. Select your setting, then press 
.
On — Reception is attenuated by about 20 dB. Off — The attenuator is off.
Setting Data Skip
[MENU] Srch/CloCall Opt 
Set Data Skip 
This setting controls how the scanner behaves when it stops on a channel that has a data signal.
On — the scanner stops briefly on the channel, but then immediately resumes scanning automatically.
Off — the scanner remains on the channel until the transmission stops. The default setting is Off.
Note: If you are trying to test the Close Call feature with a nearby transmitter (such as a CB) and you do not talk into the transmitter, the scanner detects this unmodulated carrier as data and skips the frequency when Data Skip is on. Turn the feature off or talk into the transmitter to modulate the carrier.
This setting is ignored for AM/WFM/FMB channels.
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