Kenwood TH-415A - Manual (Page 13)

TH-415E/215E:
In Europe a 1 750 Hz tone is used in transmit. In the United
-Kingdom a 1750 Hz tone burst at the beginning of each
transmission is used. Since use of these tones is required in
the U.K. and in Europe the tone encoder is included as stan­
dard equipment.
Tone Frequency
67.0 Hz 107.2 Hz 167.9 Hz
71.9 Hz 110.9 Hz 173.8 Hz
74.4 Hz 114.8 Hz 179.9 Hz
77.0 Hz 118.8 Hz 186.2 Hz
79.7 Hz 123.0 Hz 192.8 Hz
82.5 Hz 127.3 Hz 203.5 Hz
85.4 Hz 131.8 Hz 210.7 Hz
88.5 Hz 136.5 Hz 218.1 Hz
91.5 Hz 141.3 Hz 225.7 Hz
94.8 Hz 146.2 Hz 233.6 Hz
97.4 Hz 151.4 Hz 241.8 Hz
100.0 Hz 156.7 Hz 250.3 Hz
103.5 Hz 162.2 Hz
Tone frequency selection
To select the tone frequency,
press the I I and the
R/TONE.F key. The display
will show a operating tone
frequency.
Press either the I ^ I key or
the I ▼ I key momentarily,
the frequency will change 1
step up or down. Press the
I ENTER I key to 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 ac­
tivated squelch, turn the Squelch control clockwise past
the detent.
It is a good operating practice to check the frequency
before 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 (with the TH-415A/
315A/215A)
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
telephone, 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 telephone. 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 repeater systems for
various control functions. You should check with the con­
trol operator of your repeater to determine if their use is re­
quired. 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 us­
ing the PTT switch. Then simply press the numbers cor­
responding to the telephone number you want to dial.
Some repeaters will require a special sequence of keys to
activate the autopatch. Again you should check with the
control operator of your repeater for this sequence.
After you have pressed
the first number key the
radio will remain keyed for
approximately 2 seconds.
This is done so you do not
have to hold the PTT switch
depressed while dialing.
The radio remains keyed
after
you press each
number for this 2 seconds
interval.
13
Audio tones (Hz)
\Column
Row \
1209 1336 1477 1633
697 1 2 3 F = A
770 4 5 6 M = B
852 7 8 9
ENTER
= C
941
A
♦ 0
T SCAN
= D