Tone Scan - Icom ic-U80 Instruction Manual

r When receiving a signal that includes a matched tone or
code, the squelch opens and the signal can be heard.
• When the pocket beep function is activated, beep tones sound
and " " blinks. To stop the beeps and blinking, push any key.
• When the received signal's tone/code does not match, the
squelch does not open. However, the signal icons show the sig-
nal strength.
• To open the squelch manually, hold down [MONI].
t Push [PTT] to reply.
✔ For your information
Squelch burst:
While using the tone squelch, noise may be heard just when
the received signal disappears.
To eliminate the noise, the IC-U80/IC-U80E has the Squelch
Burst function.
See page 49 for details.
TONE SQUELCH AND POCKET BEEP

■ Tone scan

By monitoring a signal from a repeater, pocket beep or
squelch function operation, you can determine the subaudi-
ble tone required to access the repeater or open the squelch.
q Set a frequency to be checked for a tone frequency or
DTCS code.
w Push [FUNC](M), and then [TONE](1).
• Repeat step w one or more times to activate a desired tone
function.
• The tone scan can be made even if the tone function is not se-
lected.
e Push [FUNC](M), and then [T.SCAN](3) to start a tone
scan.
• To change the scan direction, push [p] or [q].
r When a tone frequency or DTCS code is matched, the
squelch opens and the tone frequency or code is tempo-
rarily programmed into the selected mode.
• The decoded CTCSS tone frequency or DTCS code is used ac-
cording to the selected tone function type in step w.
- No indication : Cannot be used for operation.
-" " : Repeater tone encoder
-" " : CTCSS tone encoder/decoder
-" " : DTCS code encoder/decoder
D
-" " and " " : DTCS code encoder
D
t To cancel the scan, push any key except [
[MONI] or [FUNC](M).
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], [p]/[q],
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