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If the microphone off-hook condition is detected (Hangup Box Monitor selected by 
programming), scanning stops and selective squelch (such as Call Guard CTCSS or NAC/
group ID detect) is disabled on conventional channels. If the off-hook condition is not 
detected, taking the microphone off-hook has no affect on radio operation. When a call is 
received in the scan mode, the alias of the channel on which a call is received (and any 
other display parameters that may be programmed) are displayed until scanning resumes. 
The selected channel alias is then displayed if applicable.

There are two scan modes available: Priority (standard) and Radio Wide. The operation of 
the priority type is unique to the type of channel selected, and the operation of the Radio 
Wide type is the same regardless of the channel type selected. Only one type of scanning 
can be enabled at a time. For example, if priority scanning is enabled and Radio Wide 
Scan is enabled, priority scanning is automatically disabled and vice versa. Refer to the 
following for more information.

Priority scanning (also referred to as standard scanning) monitors only channels that are 
the same type as that currently selected. For example, if a conventional channel is 
selected, only conventional channels are scanned and likewise for SMARTNET/
SmartZone and Project 25 trunked channels.

For more information on scanning functions in the Conventional mode, refer to 
Section 5.10, and for more information on how it functions in the other modes, refer to 
Section 6.11. Scanning is turned on and off by the Scan option switch as follows. If this 
switch is not programmed, scanning is not available.

• To turn priority scanning on, press the SCAN option switch. Scanning is enabled when 

a rotating   is indicated in the right status display as follows and “SCAN ON” is briefly 
displayed. 

• To turn scanning off, press the SCAN option switch again. 

On conventional channels 

with early versions of firmware, this may also select another list, so several presses may 
be required (see Section 5.10).

 Scanning is disabled when “SCAN OFF” is briefly 

displayed and 

 is no longer indicated in the status display.

• If the zone or channel is changed while scanning is selected, scanning continues on the 

same or a different scan list (see Section 4.12.1).

Scan Enable Indicator