Autopatch Operation - Kenwood TM-231A Instruction Manual

Mode. When this option is installed and the CTCSS func-
tion has been activated the radio will not open squelch un-
til the proper PL tone is received.
In Europe a 1750 Hz tone is used in transmit. Press and hoid
the Microphone 1750 key to transmit with the access tone,
you need not press the PTT key.
Since this tone is required in Europe and the United King-
dom a 1750 Hz tone encoder is included with models deli-
vered to these countries.
Tons Frequency Selection
1. Press the F key for longer
than 1 second. The F indi-
cator will begin to flash. Tone Frequency
Press the TONE/T.ALT key 87.0 Hz | 107.2 Hz | 167.9 Hz
within 10 seconds of 71.9 Hz | 110.9 Hz | 173.8 Hz
74.4 Hz | 114.8 Hz | 179.9 Hz
: : 82.5 Hz | 127.3Hz | 203.6 Hz
show in the display. 85.4 Hz | 131.8Hz | 210.7 Hz
88.5 Hz | 136.5 Hz | 218.1 Hz
or press the microphone [( 97.4 tizi| 151.4 Hz | 241.8 Ha
UP/DWN_ switches to | 100.0H2 | 156.7 Hz | 250.3 Hz
select the desired tone fre- 103-5 Hz | 162.2 Hz
Note: 97.4 Hz is available only
uency.
quency for encode.
3. Press any front panel key
to return to the normal fre-
quency display.
Tone/CTCSS Operation
Press the TONE/T.ALT key and select the desired Tone mode.
When the T indicator appears in the display the transmitter
will transmit the desired tone. When the CTCSS indicator ap-
pears in the display the transceiver will transmit the desired
tone and will also operate in the Tone Squelch mode, i.e.
squelch will not open until the same tone is received as a
portion of the incoming receive signal. When no indicator is
on the radio will not make use of either tone feature.
Note: — 4 a
The tone frequency of 97.4 Hz is available for tone encode
only. No Tone Squelch is possible with this frequency.
4-6-4. Autopatch Operations (U.S.A. versions only)
Some repeaters offer a service known as autopatch. This
feature allows you to dial a telephone number from your
transceiver and carry out a telephone conversion, much like
a care telephone, or cellular telephone. This function requires
the use of a DTMF (Dual Tone Multi Frequency) pad. The
MC-44DM microphone provides the normal keys you would
have on your telephone at home, as well as 4 additional
keys, the A, B, C, and D keys. These keys are used for con-
trol purposes on some repeater systems. You should check
with the control operator of the repeater to see if they offer
autopatch services. A chart is provided that lists the vari-
ous tone frequencies that are generated by the Keypad.
To activate the keypad:
1. Press and hold the PTT key.
2. Press the keys just like you would dial you telephone at
home.
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