GME TX3520 - Manual (Page 15)

t X 3 5 1 0 / t X 3 5 2 0 / t X 3 5 4 0 I n s t r u c t I o n m A n uA l PA G E 1 5
two separate open scan modes. Alternately you may prefer
to have two separate Group scan modes with different scan
channels in each. Your radio can be programmed to convert
the Group scan into an open scan and vice versa. If this is
required, please contact your GmE retailer to arrange for this
feature to be activated.
When two open scan or two Group scan modes are enabled,
the scan Group selection screen will display o1 and o2 for the
open scan groups or G1 and G2 for the Group scan groups.
see the section ‘Selecting a Scan Group’ on page 13.
NOTE: Enabling or disabling the second open or Group
scan mode is not a user selectable option. once enabled or
disabled, the new scan mode becomes a permanent part of
your radio’s features. If you decide later that you need the
original scan mode settings restored you will need to return
your radio to your GmE retailer for re-programming.
CTCSS & DCS
the standard squelch system is fine for quietening the radio
in most applications. However it operates solely on signal
strength which means that it will always open to any signal
that is strong enough. If the channel is busy with other
stations the squelch will be constantly opening which can
make it difficult to determine which calls are meant for you.
ctcss/Dcs provides additional selective receiver audio muting
using sub-audio signalling. When enabled, only signals with a
matching sub tone will be heard in the speaker. this effectively
creates a channel that is silent to all traffic except those who
use the same subtone as you.
Choosing CTCSS or DCS
ctcss uses a continuous analogue sub tone while Dcs uses a
digitally encoded sub tone. choosing which tone system to use
will largely depend on the other radios you talk with. If others
already use ctcss or Dcs, you should select the tone system
that matches theirs. If the users you talk to don’t currently use
ctcss or Dcs then you can make your own choice. there is
no difference in performance or function between the different
tone sets. Both types are included in the radio to maintain
compatibility with other radio systems.
CTCSS tone set
there are two ctcss tone sets available – the basic 38 tone
set or the extended 50 tone set (see the ctcss tone chart
at the rear of this manual). Both are included to ensure
compatibility with other radios.
to switch between ctcss tone sets;
1. switch the radio oFF.
2. Press and hold the SQL key while switching the radio
on again.
3. CTC38 or CTC50 will appear briefly.
NOTE: When switching between tone sets, if you already have
a ctcss tone selected, the radio will try to match the original
tone frequency with one in the new table. If there is no tone
match, the ctcss tone will be set to oFF and you will need to
select a new tone.
DCS tone set
there are 104 Dcs tones available (see the Dcs tone chart at
the rear of this manual).
To Select a CTCSS or DCS tone
1. select any uHF cB channel 1 – 80 (excluding 5 and 35).
2. Press and hold the Menu key until the radio beeps. the
ctcss menu option will be displayed.
3. If CTCOF is displayed, ctcss/Dcs tones are currently
switched off (default). to enable ctcss tones, rotate the
Channel knob to the right (or press ). ctcss tones will
be displayed as CTC01 – CTC50.
4. continue rotating the Channel knob (or press
repeatedly) to scroll past the last ctcss tone (38 or 50) to
access the Dcs tones. Dcs tones are displayed as
DT001 – DT104.
Press or rotate left
ctcss off ctcss tone 50 Dcs tone 104
Press or rotate right