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ICOM 283300 Manuale Utente

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Subaudible tones
Some repeaters require subaudible tones to be accessed.
Subaudible tones are superimposed over your normal signal
and must be set in advance.
q Push 
[A•
FUNC
]
, then push 
[8•
SET
]
to enter 
SET MODE
.
w Push 
[
Y
Y
]
or 
[
Z
Z
]
one or more times until “rt” appears.
e Rotate 
[VOL]
to select the desired subaudible tone.
r Push 
[
✱
•
ENT
]
(or 
[D•
CLR
]
) to fix the selected tone and
exit 
SET MODE
.
• Available subaudible tone frequencies
(unit: Hz)
D
D
Tone information
Some repeaters require another tone system to be accessed. 
DTMF TONES
While pushing 
[PTT]
, push the desired DTMF keys (0–9,
[A•
FUNC
]
, 
[B•
CALL
]
, 
[C•
MR
]
, 
[D•
CLR
]
, 
[#•
BANK
]
and
[
✱
•
ENT
]
) to transmit DTMF tones.
•
[
✱
•
ENT
]
transmits as “E”, 
[#•
BANK
]
transmits as “F.”
• The transceiver has 16 DTMF memory channels (p. 26).
1750 Hz TONE
While pushing 
[PTT]
, push 
[
Y
Y
]
or 
[
Z
Z
]
to transmit a 1750 Hz
tone signal.
✔
Convenient
Tone scan function:
When you don’t know the subaudible
tone used for a repeater, the tone scan is convenient for de-
tecting the tone frequency.
Push 
[A•
FUNC
]
, then push 
[3•
T
.
SCAN
]
to start the tone scan.
• Push 
[D•
CLR
]
to cancel the scan.
• When the required tone frequency is detected, the scan
pauses.
67.0
69.3
71.9
74.4
77.0
85.4
88.5
91.5
94.8
97.4
100.0
103.5
79.7
82.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
159.8
162.2
165.5
167.9
171.3
173.8
177.3
179.9
183.5
186.2
189.9
192.8
196.6
199.5
203.5
206.5
210.7
218.1
225.7
229.1
233.6
241.8
250.3
254.1
USING
SET MODE
18
5
REPEATER OPERATION