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22
Squelch Off
Time-out Timer (TOT)
Optional Accessories
Invalid Channel Indication
Squelch
Digital
Emergency
Busy Channel Lockout
Emergency Alarm with Voice to Follow
If the feature “Squelch Off” is enabled, the speaker will keep unmuted no matter whether carrier is present.
Operation:
• Press the programmed Squelch Off key to enable the feature. Then the radio displays the icon and sounds background noise. To
disable the feature, press this key again.
• Hold down the programmed Squelch off Momentary key to enable the feature. Then the radio displays the icon and sounds
background noise. To disable the feature, release this key.
The purpose of TOT is to prevent any user from occupying a channel for an extended period. If the preset time expires, the radio will
automatically terminate transmission and keep beeping. To stop beeping, please release the PTT key. You must wait for a certain time
period (preset by your dealer) to initiate another transmission.
If the pre-alert function is set by your dealer, your radio will alert you to the TOT expiration in advance.
Note: This feature is null in Emergency mode.
If the current operating channel is invalid,the radio will send continuous
“Dududu”
as
alert
tone,which means the current channel is
unable to transmit or receive.
The squelch
level
decides
how
strong
the
signal
is
to
unmute
the
speaker
.
The
lower
the
squelch
level
is
,
the
stronger
the
background
noise
is
to
unmute
the
speaker
.
The
larger
the
talk
range
is
,
the
weaker
the
Rx
anti
-
interference
ability
is
.
Setting
range
is
0
-
9
,
it
causes
the
squelch
to
open
by
selecting
“
0”
.
The
higher
the
squelch
level
is
,
the
harder
to
open
the
squelch
.
Those
items
include
:
VHF
Antenna
UHF
Antenna
GPS
Antenna
DTMF
Microphone
Programming
Cable
Programming
Software
Optional
accessories
and
replacement
parts
are
available
.
Operation:
1. Press the programmed Emergency key to go
to
the
Emergency
Revert
Channel
,
and
the radio displays the icon .
2. When the icon appears, you can speak into the microphone to make an emergency call.
3. When the icon appears, you can receive. And when a call is received, the icon appears. If the preset Voice Cycles expire, you can
hold down the PTT key to make the emergency call again (the radio displays the icon, with red LED glowing
red).
After the emergency call is transmitted, release the PTT key to receive (the radio displays icon).
And when a call is received, the icon appears.
To exit the Emergency mode,
long press the programmed Emergency key.
Note:Your dealer may set the time of voice cycles,
duration of each transmission and Tx interval.
If enabled via the programming software, this feature can prevent your radio interfering with other transmitting
terminals on the same channel. If you hold down the PTT key while the channel is in use, your radio will keep beeping
and display text information “Channel Busy!” alerting you to transmission prohibition. To stop beeping, please release
the PTT key. When the channel is free, you can press and hold down the PTT key to transmit.
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