Titan
™
Mobile User’s Guide
14
©
2005, Midland Radio Corporation
Carrier Squelch Operation
A signal that matches the programmed receive frequency will be
heard if it is of sufficient strength to exceed the squelch
threshold. An on frequency signal exceeding the squelch
threshold level will be indicated by the BUSY icon.
CTCSS/DCS Operation
CTCSS or DCS signaling adds an additional condition to carrier
squelch operation. In addition to the signal having to exceed the
squelch threshold level, the received signal must also have the
correct CTCSS or DCS tone or code before the audio will be
passed to the speaker. CTCSS or DCS signaling allows multiple
users on the same frequency to hear only signals which have
their correct CTCSS tone or DCS code. An on frequency signal
without the correct CTCSS or DCS signal will be indicated by the
BUSY icon while no audio is heard.
CTCSS/DCS allows multiple users to share the same frequency.
However CTCSS/DCS is only useful to avoid disturbing other users with
messages not related to them. If more than one radio is transmitting at
the same time, this will cause interference. Do not transmit if the BUSY
icon is on. Wait until the channel is clear before transmitting.
2-tone Operation
2-tone signaling allows individual or group calls to be made to
your radio. On channels programmed for 2-tone decode
operation, you can press the channel/menu knob for two
seconds to mute all receive signals until the programmed 2-tone
signal has been decoded. After the programmed 2-tone signal is
decoded, the radio will beep, and subsequent receive audio will
be heard over the speaker. Press and hold the channel/menu
knob again to mute the radio until it receives a new call. Pressing
the MON button or PTT will disable the 2-tone muting function.
Consult your dealer or communications coordinator for further details on
how your radio has been programmed for 2-tone operation.
