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SELECTIVE CALL
CTCSS and DCS
You may sometimes want to hear calls from only
specific persons or groups. In this case, use the
selective call function. This transceiver is equipped
with CTCSS (Continuous Tone Coded Squelch
System) and DCS (Digital Coded Squelch). These
selective calls allow you to ignore (not hear)
unwanted calls from other persons who are using the
same frequency. The transceiver unmutes only when
it receives the signal having the same CTCSS tone or
DCS code.
Note:
◆
CTCSS and DCS do not cause your conversation to be private or
scrambled. It only relieves you from listening to unwanted
conversations.
◆
CTCSS and DCS function in only FM mode.
CTCSS
A CTCSS tone is a sub-audible tone and is selectable
from among the 42 tone frequencies listed in the
table on the following page. The list includes 37 EIA
standard tones and 5 non-standard tones. You can
select one of the tones to use as a CTCSS tone.
USING CTCSS
Press [TONE] until “CT” appears.
• Each time you press [TONE], the icon cycles as
follows: “ ” (TONE) ➞ “CT” (CTCSS) ➞ “DCS”
(DCS) ➞ “ ” (OFF) ➞ “ ” (TONE).
When the CTCSS function is ON, you will hear calls
only when the selected CTCSS tone is received. To
answer the call, press and hold the PTT switch, then
speak into the microphone.
Note:
◆
You cannot use the CTCSS and Tone/ DCS functions
simultaneously. Switching the CTCSS function ON after having
activated the Tone/ DCS functions deactivates the Tone/ DCS
functions.
◆
If you select a high CTCSS frequency, receiving audio or noise
that contains the same frequency portions may cause CTCSS to
function incorrectly. To prevent noise from causing this problem,
select an appropriate squelch level {page 6}.
◆
While transmitting the 1750 Hz tone by pressing [CALL]
{page 13} , the transceiver does not transmit the CTCSS tone.
SELECTING A CTCSS FREQUENCY
1 While in CTCSS mode {above}, press [F],
[TONE].
• The current CTCSS frequency appears.
2 Turn the Tuning control or press [ ]/ [ ] to select
your desired CTCSS frequency.
• The selectable CTCSS frequencies are the
same as those for the Tone frequency. Refer to
the table on the following page for the available
CTCSS frequencies.
3 Press [ ] or [MNU] to store the new setting.
Otherwise, press [ ] or [PTT] to cancel.
CTCSS frequency:
88.5 Hz
CTCSS frequency:
88.5 Hz
CTCSS frequency:
100.0 Hz
CTCSS/ DCS:
OFF
Received
Not
Received
Not
Received