Reverse Function; Tone Operation; Tone Frequency Selection - Kenwood TM-241A Instruction Manual
144/430/440/1200mhz fm transceiver
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Also See for TM-241A:
- Instruction manual (60 pages) ,
- Service manual (11 pages) ,
- Instruction manual (57 pages)
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5-6-2
Reverse Function
Some repeaters utilize a 'Reverse Pair', i.e. the transmit
/ receive frequencies are exactly the reverse of another
repeater.
For example
repeater A uses
146.000
for a
transmit frequency (INPUT) and 146.600 for a receiver
frequency (OUTPUT). Repeater B might use 146.600 for
a transmit frequency
and
146.000
for a receiver fre-
quency. It would be inconvenient to have to reprogram
the transceiver each time you wanted to use these re-
peaters.
The REV/STEP key allows you to easily reverse the trans-
mit and
receive
frequencies.
To use the REV
function
press the REV/STEP key. The REV indicator will turn on in
the display to remind
you that you are working
a re-
verse pair.
To return to normal press the REV/STEP key again. The
REV indicator will turn off.
This function is also useful to check the input frequency
of the repeater so that you can
determine
if you
are
within range for simplex communications.
5-6-3
Tone Operation
Some repeaters require the use of a control signal to ac-
tivate the repeater. Several different methods
are cur-
rently in use.
In the United
States sub-audible
tones
are sometimes
used. 38 different Sub-audible frequencies are possible.
In Europe a 1750 Hz tone is used In transmit.
Press and
hold the Microphone
1750 key to transmit with the ac-
cess tone; you need not press the PTT key.
Since
this tone
is required
in Europe
and
the United
Kingdom
a
1750
Hz
tone
encoder
is included
with
models delivered to these countries.
5-6-4
Tone Frequency Selection
1. Press the F key for longer than 1 second.
The F indi-
cator will begin to flash.
Press the TONE/T.ALT
key
within 10 seconds of pressing the F key. The current
tone frequency will show in the display.
Press the key for longer than
1 second.
2.Rotate
the
tuning
Tone Frequency( Hz )
control
or
press
the
67.0 ; 107.2|
167.9
microphone
UP /DWN
71.9
| 110.9:
173.8 |
switches to select the
| va
148 179.9 |
Sour
re
79.7 | 123.0]
192.8
82.5
127.3 | 203.5
3. Press any front panel
85.4 | 131.8]
210.7
key to return
to the
88.5 | 136.5)
218.1
normal
frequency
91.5
; 141.3 | 225.7
display.
[94.8 | 146.2 | 233.6
| (97.4);
1514)
241.8
| 100.0| 156.7) 250.3
103.5 | 162.2
Note : 97.4 Hz is available
only for encode.
29
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