the frequencies are the control channel frequencies. Otherwise, you must enter all of the frequencies.
Setting Modulation
Menu
Program System
Select the system
Set Modulation
Auto - the scanner uses the default 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.
Note: The default setting is Auto.
This setting controls the modulation method used for the frequency band. In most cases, if you leave this set to Auto, the scanner automatically selects the correct modulation type for the system you are programming.
Setting Attenuation
Menu
Program System
Select the system
Set Attenuator
This setting controls whether the attenuator will be on or off for the current system. Select your setting then press the scroll control.
Off - the attenuator is off.
On - system frequencies are attenuated by about 18 dB.
Notes:
•Turn on this setting if you are near strong signal sources. Attenuation can help reduce interference and desensitization that strong signals create.
Programming Radio Systems
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