Subaudible tone operation, Tone squelch operation – Icom COMMUNICATIONS RECEIVER IC-R3 User Manual
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8
SUBAUDIBLE TONE OPERATION
■
Tone squelch operation
◊
Operation
The tone squelch opens only when receiving a signal con-
taining a matching subaudible tone. You can silently wait for
calls from group members using the same tone in an ama-
teur band.
q
Set the operating frequency in FM mode.
w
Set the desired subaudible tone in set mode.
• See the following section for programming.
e
Push [FUNC] + [(MODE) SET] momentarily to enter set
mode.
• Select a non-band scope screen in advance for color LCD.
r
Rotate [DIAL] until “Tone Squelch” or “tSqL” appears.
• “tSqL” disappears after 1 sec. and “to” appears when color LCD is
OFF.
t
Push [
↔
] or rotate the tuning dial while pushing [FUNC] to
select “TSQL” (tone squelch).
y
Push [(MODE) SET] to exit set mode and start the tone
squelch.
u
When the received signal includes a matching tone, the
squelch opens and the signal can be heard.
• When the received signal’s tone does not match, tone squelch
does not open, however, the S-indicator shows signal strength.
• To open the squelch manually, push and hold [SQL]. (default)
i
To cancel the tone squelch, repeat steps
e
–
y
as de-
scribed above and select “OFF” in step
t
.
◊
Setting subaudible tones for tone squelch
operation
q
Select VFO mode or desired memory channel to be pro-
grammed.
• Each operating band and each memory channel have indepen-
dent settings.
w
Push [FUNC] + [(MODE) SET] momentarily to enter set
mode.
• Select a non-band scope screen in advance for color LCD.
e
Rotate [DIAL] until “Tone Freq.” or “tonE” appears.
• “tonE” disappears after 1 sec. and “Ct” appears.
r
Push [
↔
] or rotate the tuning dial while pushing [FUNC] to
select a subaudible tone.
t
Push [(MODE) SET] to exit set mode.
Tone function set
mode
Tone Squelch: OFF
Tone Freq. : 88.5
Duplex : OFF
Offset Freq.: 0.600
Scan Resume : 2SEC
Tone Squelch: OFF
Tone Freq. : 88.5
Duplex : OFF
Offset Freq.: 0.600
Scan Resume : 2SEC
Tone Squelch: TSQL
Tone Freq. : 88.5
Duplex : OFF
Offset Freq.: 0.600
Scan Resume : 2SEC
Tone squelch OFF
Tone squelch ON