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About the radio controls
The radio controls are the PTT key, power/volume control, channel
selector, top key and function keys.
Some keys may have functions assigned to both short and long
key presses:
■ a short key press is less than one second, and
■ a long key press is more than one second.
The radio controls and their functions are described in the
following sections.
Name Function
PTT key Press and hold to transmit and release to
listen
Power/volume control Rotate to turn on the radio and change
the speaker volume
Channel selector Select and change channels
Top key Programmed as the emergency key or for
a frequently used option
Function keys 1 and 2 Programmed for frequently used options
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