GMH Plus Owner’s Manual
7
TRANSMIT
Press the PTT (Push-To-Talk) switch on the microphone. The TX
1.
annunciator appears on the display and the red Transmit indicator
illuminates while the PTT is pressed.
Talk in a normal voice with the microphone approximately one to
2.
two inches from your mouth.
Release the PTT switch to stop transmitting.
3.
If the TX annunciator does not appear and a tone is heard, you are on
a receive-only channel or the channel is busy (if Busy Channel Lockout
is enabled). Turn the Channel Selector knob to an authorized transmit
channel or wait until the channel is clear (if Busy Channel Lockout is
enabled).
If the length of your transmission exceeds the preset Time-Out Timer
setting, the transmitter automatically shuts off and a tone sounds. To
continue the transmission, release the PTT switch, then press it again
and continue talking.
CHANNEL GUARD OPERATION
Channel Guard allows one radio or group of radios to be selectively
called within a system. If the radio has been programmed with Channel
Guard, use the following receive and transmit instructions.
SQUELCH CONTROL
Sub-audible signaling (CTCSS/CDCSS) is used to allow a group of
radios to be selectively called in a system. Programming the receive
guard equal to zero allows for Carrier Squelch operation, where the
radio will unmute whenever a carrier is detected.
CHANNEL GUARD RECEIVE
Turn power on by pushing and releasing the Volume knob. The
1.
radio will beep, indicating that it has passed its self test and is
operational.
Set volume by pressing the
2.
[MON]
button to hear squelch noise.
Turn the Volume knob to set a comfortable volume level. Press
the
[MON]
button again to stop squelch noise.
Select a channel group (if applicable) by pressing the
3.
[GRP]
button and turning the Channel Selector knob. Press the
[GRP]
button again to return to Channel Select mode.
