GME TX6500S - Manual (Page 29)

T X 6 5 0 0 S I N S T R U C T I O N M A N UA L 2 9
Receiving Group calls
Receiving a Group call is identical to receiving a normal SelCall except that the alarm sound is a LOW
tone beep instead of the normal High tone beep. The Callers Ident or ALPHA Name appears on the
display in the usual way.
Storing Group call Idents
Group Call Idents can be stored in memory in the same way as a standard SelCall Ident.
CTCSS & DCS
CTCSS (Continuous Tone Coded Squelch System) and DCS (Digital Coded Squelch) are similar Squelch
quieting systems that allow groups of users to share the same channel without disturbing each other.
The CTCSS system uses 1 of 50 low frequency tones to open and close the Squelch on the radio. The
DCS system is similar to CTCSS but uses 1 of 104 digital codes to control the Squelch.
Your choice of CTCSS or DCS will largely depend on which is currently being used by other radios in
your group. If neither system is currently in use, you can make your own choice. There is no difference
in performance between the two systems.
When CTCSS or DCS is enabled on your radio, only signals that are using the same code as your radio
will be heard in your speaker and the Squelch will remain closed to all other signals.
NOTE: Enabling CTCSS or DCS codes do not prevent others from hearing your transmission.
CTCSS/DCS tones are switched off by default. To use CTCSS/DCS you must first enable a suitable
CTCSS/DCS code from the Menu (see Menu options for more details). CTCSS and DCS codes are both
accessible from the CTCSS Menu.
CTCSS TONE SET COMPATIBILITY
The GME CTCSS tone set comprises a table of 50 tones made up of the standard CCIR-38 Tone Set
plus an additional 12 tones added to the end. If communicating with other brands of radios that only
use the CCIR-38 tone set, please select from one of the first 38 tones to ensure compatibility with
these models.
IMPORTANT: If communicating with other GME radios, you may choose from any of the 50 tones.
However, please refer to the tone set tables listed in each radio’s Instruction manual for compatibility
because, although the same 50 tones are available in all GME radios, the tones used in older GME
models may be listed in a different order.
To enable a CTCSS or DCS code:
1. Press and hold the key until the radio beeps.
2. Press the key repeatedly until ‘CTCOF’ appears.
3. Press the key to enable CTCSS and select a CTCSS code (CTC01 to CTC50).
4. Continue pressing the past CTC50 to select a DCS code (DT001 to DT104).
5. Press the PTT to exit.
To disable a CTCSS or DCS code:
1. Press and hold the key until the radio beeps.
2. Press the key repeatedly until the current CTCSS (CTCXX) or DCS (DTXXX) tone setting
appears (where the ‘X’ is a tone value).
3. Press the key repeatedly until ‘CTCOF’ is displayed.
4. Press the PTT to exit.
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