User's Manual

20-496 Owner’s Manual Draft Page 44/78
FM/DIGITAL– configures the channel for the FM/DIGITAL mode.
CT – configures the channel for CTCSS mode.
DC – configures the channel for DCS mode.
MO – configures the channel for the MO mode for analog or digital Motorola trunking system channels, or
APCO-25 trunking system channels.
Note: MO and ED modes are not available when performing service searches, limit searches and the
TUNE function.
ED – configures the channel for the ED mode for EDACS trunking system channels.
USING THE ATTENUATOR
To reduce interference or noise caused by strong signals, you can reduce the scanner’s sensitivity with the
attenuator.
There are two attenuator modes in your scanner. Normal attenuator mode allows you to set the attenuator
on a per-channel basis. Normal mode is useful when individual channels are found to be prone to
interference.
Global attenuator mode applies attenuation to every channel in the scanner, and overrides any normal
mode attenuator settings that you may have entered
To assign attenuation to a channel in the scanner:
Press ATT when the scanner is stopped on a channel, or by manually navigating to a channel by using
direct channel entry or pressing the ^ or v arrow keys. A will appear in the top line of the display. Press ATT
again to toggle attenuation off.
To assign attenuation to a search bank:
Press ATT while searching. Attenuation will be applied to the active search bank, or search group within a
search bank. Press ATT again to turn attenuation off.
Notes:
. The attenuator is very effective at reducing strong signal overload interference when using the scanner in
areas close to cellular telephone transmitting facilities.
. If you turn on the attenuator, the scanner might not receive weak signals.
. Activating the normal attenuator mode on a Motorola or APCO Project 25 trunking control channel will