Tone Selection - Kenwood TH-78A Instruction Manual

For example, repeater A uses 146.000 as an input frequency, and 146.600 as an output frequency. Repeater B
might use 146.600 as an input frequency, and 146.000 as an output frequency. It would be quite inconvenient to
have to reprogram the transceiver each time you want to use these repeaters.
Press the F key, then press the SHIFT/REV key. The R indicator displays to remind you that you are working a
reverse pair.
Press the F key, then press the SHIFT/REV key again to return to normal. The R indicator will disappear.
This function is also useful in checking the repeater input frequency, allowing you to determine if you are in range
for simplex communication.
6 Tone Operation
Some repeaters require a control signal to activate them. Several different methods are currently in use.
In the United States, sub-audible tones are sometimes used. This transceiver will generate sub-audible
frequencies.
In Europe and the United Kingdom, a 1750 Hz tone is used in transmitting. Simply press and hold the TONE key to
transmit the access code. You need not press the PTT switch. A 1750 Hz tone encoder is included with models
delivered to Europe and the United Kingdom.
Selecting Tone Frequencies
If the optional CTCSS unit (TSU-7) is not installed, you cannot change the tone frequency.
1) Press the F key for longer than one second, then press the TONE key. The current tone frequency will appear
on the display.
2) Rotate the tuning control to select the desired tone frequency (Hz)
(Hz) (Hz)
67.0 82.5
71.9 85.4
74.4 88.5
77.0 91.5
79.7 94.8
3) Press any key or simple wait 10 seconds for the transceiver to resume the previous mode.
4) If required, store the selected TONE frequency in memory with M or MR.
(Hz) (Hz) (Hz)
97.4 114.8 136.5
100.0 118.8 141.3
103.5 123.0 146.2
107.2 127.3 151.4
110.9 131.8 156.7
(Hz) (Hz) (Hz)
162.2 192.8 233.6
167.9 203.5 241.8
173.8 210.7 250.3
179.9 218.1 1750
186.2 225.7
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