Tone Squelch And Pocket Beep; Tone Squelch - Icom IC-440N Instruction Manual

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Tone squelch

The transceiver is equipped with 51 CTCSS tone frequen-
cies, 104 DTCS codes. CTCSS/DTCS operation provides
communication with silent standby since you will only receive
calls from group members using the same CTCSS tone fre-
quency or DTCS code.
NOTE: Channels 5 and 35 are used for the emergency
channels, and CTCSS/DTCS operation is not selectable
on these channels.
D
Setting CTCSS tone frequency/
DTCS code
q
Select the desired channel (excluding chan-
nel 5 or 35). (p. 14)
w
F
Hold down (Set Mode) for 2 seconds to enter Set
SET
mode.
e Push F
* or MONI * several times until "C" appears.
SET
T SQL
r Push
SCAN * to toggle the CTCSS tone frequency/DTCS
TAG
code setting mode.
t Push
or to set the desired CTCSS tone frequency
or DTCS code.
y Hold down
for 2 seconds to turn OFF the power, or
F
hold down (Set Mode) for 2 seconds to exit the Set
SET
mode.
*Regardless of the assigned key function.

TONE SQUELCH AND POCKET BEEP

[
CTCSS tone setting mode
List number (grey line)
CTCSS tone frequency
NOTE:
• The available CTCSS tone frequencies and DTCS codes
are listed on the next page.
• The transceiver has 51 tone frequencies and conse-
quently their spacing is narrow, compared to units having
38 tones. Therefore, some tone frequencies may receive
interference from adjacent tone frequencies.
7
DTCS code setting mode
List number (grey line)
DTCS code
6
7
33