Kenwood TS-480HX Operation Manual - Page 40

Enhanced Communications, Transmitting A Tone, Tone Freq. Id Scan

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7 ENHANCED COMMUNICATIONS TRANSMITTING A TONE In general, FM repeaters require the transceiver to transmit a sub-audible tone to prevent other repeaters on the same frequency from locking each other up. The required tone frequency differs among repeaters. Repeaters also differ in their requirements for either continuous or burst tones. For the appropriate selections for your accessible repeaters, consult your local repeater reference. After completing the tone settings, pressing and holding Mic [PTT] causes the transceiver to transmit the selected tone. If you have selected a 1750 Hz tone, the transceiver sends a 500 ms tone burst each time transmission starts. Note: If you store tone settings in a memory channel, you need not reprogram each time. Refer to "MEMORY FEATURES" {page 50}. ■ Activating the Tone Function 1 Confirm that FM mode has been selected on the VFO(s) {page 19}. • When using 2 VFOs, you must select FM mode on both VFOs. 2 Press [NB/T/ 7]. • "T" appears. Note: You cannot use the Tone function with the CTCSS function. ■ Selecting a Tone Frequency 1 While "T" appears (Tone function is ON), press [NB/T/ 7] (1 s). • The current tone frequency appears. The default is 88.5 Hz. No. Freq. (Hz) No. Freq. (Hz) No. Freq. (Hz) No. Freq. (Hz) 00 67.0 11 97.4 22 141.3 33 206.5 01 69.3 12 100.0 23 146.2 34 210.7 02 71.9 13 103.5 24 151.4 35 218.1 03 74.4 14 107.2 25 156.7 36 225.7 04 77.0 15 110.9 26 162.2 37 229.1 05 79.7 16 114.8 27 167.9 38 233.6 06 82.5 17 118.8 28 173.8 39 241.8 07 85.4 18 123.0 29 179.9 40 250.3 08 88.5 19 127.3 30 186.2 41 254.1 09 91.5 20 131.8 31 192.8 42 1750 10 94.8 21 136.5 32 203.5 Note: ◆ You can select a tone frequency independent of a CTCSS frequency. ◆ When 1750 Hz is selected, the transceiver sends a 500 ms tone burst each time transmission starts. You cannot transmit 1750 Hz tone manually. TONE FREQ. ID SCAN This function scans through all tone frequencies to identify the incoming tone frequency on a received signal. You may find this useful when you do not know the tone frequency that the repeater uses. 1 While the Tone function is ON ("T" is visible), press [NB/T/ 7] (1 s). • The current tone frequency appears. 2 Press [SCAN/ SG.SEL] to activate the Tone frequency ID scan. • While the transceiver is receiving a signal, "T" blinks and every tone frequency is scanned. When the tone frequency is identified, the transceiver stops scanning and the identified frequency is displayed. 2 Turn the MULTI control to select the desired tone frequency. • The available tone frequencies are listed in the following table. 3 Press [MTR/ CLR] to complete the setting. • Press [SCAN/ SG.SEL] to stop scanning while the tone frequency ID scan is active. • Press [SCAN/ SG.SEL] again to resume scanning. Note: Received signals are audible while scanning is in progress. 32

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32
7
ENHANCED COMMUNICATIONS
TRANSMITTING A TONE
In general, FM repeaters require the transceiver to
transmit a sub-audible tone to prevent other
repeaters on the same frequency from locking each
other up.
The required tone frequency differs among
repeaters.
Repeaters also differ in their requirements
for either continuous or burst tones.
For the
appropriate selections for your accessible repeaters,
consult your local repeater reference.
After completing the tone settings, pressing and
holding Mic
[PTT]
causes the transceiver to transmit
the selected tone.
If you have selected a 1750 Hz
tone, the transceiver sends a 500 ms tone burst each
time transmission starts.
Note:
If you store tone settings in a memory channel, you need not
reprogram each time.
Refer to “MEMORY FEATURES” {page 50}.
■
Activating the Tone Function
1
Confirm that FM mode has been selected on
the VFO(s) {page 19}.
•
When using 2 VFOs, you must select FM
mode on both VFOs.
2
Press
[NB/T/ 7]
.
•
“T” appears.
Note:
You cannot use the Tone function with the CTCSS
function.
■
Selecting a Tone Frequency
1
While “T” appears (Tone function is ON), press
[NB/T/ 7] (1 s)
.
•
The current tone frequency appears.
The default is 88.5 Hz.
2
Turn the
MULTI
control to select the desired
tone frequency.
•
The available tone frequencies are listed in
the following table.
3
Press
[MTR/ CLR]
to complete the setting.
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Note:
◆
You can select a tone frequency independent of a CTCSS
frequency.
◆
When 1750 Hz is selected, the transceiver sends a 500 ms
tone burst each time transmission starts.
You cannot
transmit 1750 Hz tone manually.
TONE FREQ. ID SCAN
This function scans through all tone frequencies to
identify the incoming tone frequency on a received
signal.
You may find this useful when you do not
know the tone frequency that the repeater uses.
1
While the Tone function is ON (“T” is visible),
press
[NB/T/ 7] (1 s)
.
•
The current tone frequency appears.
2
Press
[SCAN/ SG.SEL]
to activate the Tone
frequency ID scan.
•
While the transceiver is receiving a signal, “T”
blinks and every tone frequency is scanned.
When the tone frequency is identified, the
transceiver stops scanning and the identified
frequency is displayed.
•
Press
[SCAN/ SG.SEL]
to stop scanning while
the tone frequency ID scan is active.
•
Press
[SCAN/ SG.SEL]
again to resume
scanning.
Note:
Received signals are audible while scanning is in progress.