Getting started 21
Coverage
With analog channels, the background noise in a call
gets progressively worse when you are in fringe areas
or even slightly outside normal coverage areas. With
digital channels, a call remains clear and then drops
off quickly at the border of a coverage area. The
reason for this is that a digital call is either received or
it isn't.
About the radio controls
The radio controls are the PTT key, volume control,
on / off key, scroll keys, selection keys and function
keys. Some keys 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.
scroll
on/off key
volume
control
microphone
socket
PTT key
(press-to-talk)
red
display
speaker
green
amber
microphone
radio
status
function keys
1 to 4
left selection
right selection
Symbol
Name
Function
PTT key
Press and hold to transmit and release to
listen
Volume control Rotate to change the speaker volume
On/off key
Turn the radio on or off with a long press
Summary of Contents for TM9456
Page 1: ...TM9456 Dual Radio User s Guide MAU 03301 01 01 Issue 1 July 2016 ...
Page 2: ......
Page 55: ...Hearing faint and noisy signals 55 ...
Page 61: ...Dual radio operation 61 ...
Page 128: ...128 zones about 34 selecting 34 ...
