I Tone Scan - Icom IC-R20 Instruction Manual

I Tone scan

By monitoring a signal that is being operated with pocket
beep, tone or DTCS squelch function, you can determine the
tone frequency or DTCS code necessary to open a squelch.
qSet the frequency to be checked for a tone frequency or
code.
wTurn the desired tone type, tone squelch or DTCS, ON by
holding [7 TONE] with turning [R-DIAL].
• One of "TSQL" or "DTCS" appears.
• Even the pocket beep function is activated, the function is can-
celled when starts the tone scan.
ePush [4 T-SCAN] for 1 sec. to start the tone scan.
• To change the scanning direction, rotate [R-DIAL].
[R-DIAL]
T-SCAN
4
TONE
7
Tone squelch scan
188 0
√
DTCS scan
013
√
TONE SQUELCH AND POCKET BEEP
r When the CTCSS tone frequency or 3-digit DTCS code is
matched, the squelch opens and the tone frequency or
code is temporarily programmed into the selected condi-
tion, such as memory channel.
• The tone scan pauses when a CTCSS tone frequency or 3-digit
DTCS code is detected.
NOTE: The decoded tone frequency or code is pro-
grammed temporarily when a memory channel is se-
lected. However, this will be cleared when the memory
channel is re-selected.
✔ For your convenient!
Even no tone type is selected, either tone squelch or DTCS,
pushing [4 T-SCAN] for 1 sec. also start tone scan. In this
case, the tone scan searching for tone squelch frequency
only.
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