16 Basic Operation
Press the monitor key again to reactivate RF 
squelch.
Muting an External Device
Your radio may be fitted with the ability to mute 
another device, such as a car stereo, so that received 
or transmitted messages are heard.
Scanning and 
Voting 
Groups
A series of channels may be grouped together so 
that the radio can scan through them looking for 
activity. When a busy channel is detected in a group 
and the signaling is valid (see “What You Hear on a 
Channel” on page 14), the 
SCAN
 indicator flashes, 
and the radio stops on that channel. The name of 
the captured channel is then displayed, rather than 
the group name, and you can now hear the trans-
mission. Scanning resumes when the channel is no 
longer busy or the signaling is no longer valid.
You may be able to change the channels included in 
your group (see “Programmable Scanning and Vot-
ing Groups” on page 42).
Activating Scan Mode
1. Place the microphone on the microphone clip.
Note: Your radio may be programmed 
to scan whenever the microphone is off 
the microphone clip. Check with the 
person who programmed your radio.
2. Select the required group the same way as you 
select a channel (see “Selecting a Channel” on 
page 11). The group name and 
SCAN
 indicator 
are shown in the control head display.