GME TX675TP - Manual (Page 14)

PA G E 1 4 i n s t r u c t i o n m A n uA l t X 6 7 5
CtCss, DCs AnD sIlent MoDe
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. when ctcss or Dcs is enabled on
your radio, only signals that are using the same code as your radio will be heard in the
speaker and the squelch will remain closed to all other signals.
note: ctcss and 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 using the menu (see menu options for more details).
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. once a
ctcss or Dcs code has been enabled, the display will show (for ctcss) or
(for Dcs). You can now make selected channels ‘quiet’ by enabling silent mode on
those channels.
to activate or deactivate silent mode on a channel
1. select the required channel.
2. Press and hold the sql key. the selected ctcss or Dcs code will be displayed
on that channel.
channels that have silent mode enabled will now remain quiet unless a signal
containing your chosen code is received.
note: silent mode cannot be activated unless a ctcss or Dcs code has been
selected via the menu key (see menu options for more details). if ctcss/Dcs tones
are set to ‘off’, any attempt to activate the silent mode will be ignored. when
communicating with other radios using ctcss or Dcs, all radios must be switched to
the same channel and have the same ctcss or Dcs code selected. to receive signals
from radios that are not using ctcss or Dcs you will need to disable silent mode on
that channel.
MenU
the menu key is used to set the various feature settings. the following chart shows
the order of these selections.
# Description symbol options
1 Duplex (channels 1 – 8 and 41 – 48 only) on/oF
2 ctcss and Dcs code selection ct/dt
oF/01 – 50/
001 – 104
3 transmitter power Po Hi/lo