Monitoring The Channel - GME GA9800 Instruction Manual

to remove Duplex from a channel
1 . select the required channel 1-8 . 'duP' will be visible
on the display .
2 . Briefly press the F key followed by the DuP key .
'duP' will disappear from the display accompanied
by a low beep .
standard microphone mc503B
channel
down
Push to talk
PPt
Priority
optional microphone mc540B
Push to talk
Keylock Key
up Key
down Key
t X 3 4 2 0
ctcss (continuous tone coded squelch system) is a
squelch quieting system that allows several groups of users
to share the same channel without disturbing each other .
it uses a preset sub-audible (very low frequency) tone to
open and close the squelch on your radio . there are up to
50 tones available in two optional tone sets . the system
applies a continuous low-level tone to your transmission
and uses a matching tone decoder to control your receiver's
squelch . With ctcss enabled, the channel remains quiet
skip / call
to all incoming signals unless they carry the correct tone .
When a transmission with the correct tone is received, the
channel
squelch opens and remains open for as long as the signal is
up
present . When the transmission ends, the channel becomes
quiet again . transmissions that do not use the correct tone
will not be heard .
the tX3420 allows ctcss to be enabled or disabled on
individual channels .
note: the ctcss tone you select will be used for all ctcss
enabled channels in your radio .

monitoring thE channEl

it is useful to be able to temporarily open your radio's
squelch to allow you to listen for signals from other ctcss
users outside your group . Because their ctcss tone is
different to yours, your squelch would normally remain
closed, preventing you from hearing them . you can use
the sQl key to open the squelch and listen to the channel
to check that it is clear before transmitting . this will help
prevent you from accidentally transmitting over the top
of another transmission .
skip / call
to monitor the channel
Press the sQl key . if there are no signals present, you will
direct
hear the usual hiss of an empty channel . Press the sQl key
channel
again to restore the squelch to its previous setting .
Entry
sElEcting thE tonE sEt
Keypad
there are two standard tones sets available, one comprising
menu/
50 tones and the other comprising 38 tones . Both tone sets
Enter Key
are included in the tX3420 to provide compatibility with
other GmE radio systems .
clear Key
sElEcting thE rEQuirED ctcss tonE
to pre-select the ctcss tone on your radio, please refer to
the mEnu sEttings on page 16 .
EnaBling ctcss on a channEl
if a ctcss tone has been selected, it can be enabled on
individual channels .
i n s t r u c t i o n m A n u A l
CTCSS
PA G E 5