35
8
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 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
-“
D
”
: DTCS code encoder/decoder
-“ ” and “
D
”
: DTCS code encoder
t
To cancel the scan, push any key except
[
], [
p
]/[
q
],
[MONI] or [FUNC](
M
).
8
TONE SQUELCH AND POCKET BEEP
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