Tone Operation; Autopatch Operations - Kenwood TH-225A Instruction Manual

Tone frequency selection Tone Frequency
To select the tone frequency, [67.0Hz | 107.2Hz | 167.9Hz
= « , (24.4Hz_| 114.8 Hz | 179.9 Hz
R/TONE.F key. The display will [77.02 | 118.8 Hz | 186.2 Hz
show a operating tone fre- | 79.7 Hz | 123.0 Hz | 192.8 Hz
82.5 Hz_| 127.3 Hz | 203.5 Hz
quency. 85.4Hz_| 131.8 Hz | 210.7 Hz
Press either the £] key or the [88.5 Hz | 136.5 Hz | 278.1 Hz
91.5Hz | 141.3 Hz | 225.7 Hz
[X] key momentarily, the fre- [oaeHz [146.2 He | 233.6 Hz
100.0 H: 156.7 H; 250.3 H;
down. Press the key to = 2 2
: 103.5 Hz | 162.2 Hz
complete the selection.
Tone Squelch operation
To actuate the tone squelch function (decode), turn the
Squelch control fully counterclockwise past the detent.
Squelch will now open only when the radio receives the
same subtone frequency. To return to normal noise activated
squelch, turn the Squelch control clockwise past the detent.
It is a good operating practice to check the frequency be-
fore transmitting. A MONITOR switch has been provided
for this purpose when using the TONE SQUELCH function.
Pressing this switch will open the squelch so you can check
for activity.
NOTE:
97.4 Hz is available only for encode.
® Autopatch operations
Some repeaters offer a service known as AUTOPATCH. This
allows you to dial a telephone number from your radio and
carry out a telephone conversation, much like a car tele-
phone, or cellular telephone.
This function requires the use of a DTMF (Dual Tone Multi
Frequency) pad. This is also known as a touch tone pad.
It operates just like the touch tone pad on your home tele-
phone. In addition to the normal 12 keys that are found on
your telephone the transceiver also provides 4 additional
keys A, B, C, and D. These keys are required by some repeat-
er systems for various control functions. You should check
with the control operator of your repeater to determine if
their use is required. A chart is provided that lists the tones
that are generated when you press each key.
To use the touch tone pad you should first key the radio
using the PTT switch. Then simply press the numbers cor-
responding to the telephone number you want to dial. If you
do not want to have to hold the PTT switch depressed while
dialing you can use the procedure described below.
1. Turn the POWER switch OFF.
2. Press and hold the key.
3. Turn on the POWER switch.
4. Release the key.
Audio tones (Hz)
'Column
Then, after VOU, have 1209 | 1336 | 1477 | 1633
pressed the first number |Row
key the radio will remain | 697 1 2 3 F=A
keyed for approximately 2
seconds. The radio remains | 770 4 5 6 | M=B
keyed after you press each
number for this 2 seconds | 852 7 8 By a ATED
interval.
941 rs Co) 'e SCAN
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