There is no difference in performance between the different
tone sets.
If using CTCSS you can chose either the 50 tone set or the
38 tone set. GME radios traditionally use the 50 tone set,
however the 38 tone set is also included for compatibility
with other radios.
To switch between the 50 and the 38 tone / set:
1. Switch the radio off.
2. Press and hold the
SQL
ALPHA
key while switching the radio
on again.
3. CTC50 or CTC38 will be displayed briefly to indicate the
selected tone set.
TO SELECT A CTCSS OR DCS TONE
NOTE:
When selecting tones, CTCSS tones are prefixed with
‘CTC’ and DCS tones are prefixed with ‘DC’. Please refer to
the CTCSS/DCS table later in this manual for a list of tone
numbers and their associated frequencies.
1. Press and hold the
MENU
F
key until the radio beeps.
2. Briefly press the
MENU
F
key repeatedly until ‘CTCxx’ or
‘DCxxx’ is displayed (where xx represents a tone number
in the CTCSS or DCS Tone Frequency Chart).
3. Press the
or
keys to scroll through the tone
list and select the required CTCSS or DCS tone. CTCSS
tones are grouped in the lower half of the list while DCS
tones are grouped above the CTCSS tones.
4. If you wish to view the CTCSS frequency or DCS tone
instead of the table number, briefly press the
LVL
PRI
key.
To return to the table code, briefly press the
LVL
PRI
key again.
5. To disable CTCSS or DCS tones altogether scroll to the
bottom of the list and select ‘CTCoF’.
6. To store the setting, press and hold the
MENU
F
key until
the radio beeps or wait for it to time out.
ENABLING CTCSS/DCS ON A CHANNEL
Once a CTCSS or DCS tone has been selected, it can be
enabled on individual channels.
1. Press the
or
keys to select the required
channel.
2. Press and hold the
SQL
ALPHA
key. A high beep will be heard
and the (CTCSS) or
(DCS) will appear indicating
that the ‘Silent’ mode has been activated on that
channel.
You may activate CTCSS or DCS on as many channels
as you wish except channel 5 which is designated for
emergency use.
DISABLING CTCSS/DCS ON A CHANNEL
1. Press the
or
keys to select the required
channel. The or
icon will be visible indicating
that the ‘Silent’ mode is currently enabled on that
channel.
2. Press and hold the
SQL
ALPHA
key. A low beep will be heard
and the or
icon will disappear indicating that the
‘Silent’ mode has been disabled on that channel.
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/
DCS users outside your group. Because their CTCSS/DCS
tone is different to yours, your Squelch would normally
remain closed, preventing you from hearing them. You can
use the
SQL
ALPHA
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 others.
To monitor the channel
Briefly press the
SQL
ALPHA
key. If there are no signals present,
you will hear the usual hiss of an empty channel. Press
the
SQL
ALPHA
key again to restore the Squelch to its previous
setting.
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