Radio Shack HTX-420 - Manual (Page 5)

5
3. Hold down PTT (Push to Talk), then
speak slowly and clearly into the
microphone.
4. Release PTT when you finish
transmitting.
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4'2'#6'45
A repeater is a radio that receives a signal on
one frequency (the input frequency) and
retransmits that signal on a different
frequency (the output frequency). Repeater
antennas are typically located at the tops of
tall buildings or on antenna towers, so a
relatively low-power signal can reach the
repeater. The repeater retransmits the signal
at a higher power. This gives your transceiver
the ability to communicate over a much
greater range.
To use a repeater, you must know the
repeater's input and output frequencies.
Repeaters are usually identified by their
output frequency. Thus, a repeater that has
an output frequency of 146.94 is referred to
as the “146.94 repeater.” To determine the
input frequency, you must know the
frequency offset (typically 600 kHz for the 2-
meter band and 5 MHz for the 70-cm band)
and the offset direction (+ if you add the
offset (600 kHz) to the output, or – if you
subtract the offset (600 kHz) from the output).
Whether the offset is positive or negative
depends on:
• which part of the band the repeater
operates on
• local convention
• proximity of repeaters using the same
two frequencies
To determine the offset and the direction,
obtain a copy of The ARRL Repeater
Handbook (available through your local
RadioShack store or the ARRL). That
publication lists the locations of repeaters as
well as their frequency and offset information.
A + above the displayed frequency indicates
a positive offset, while a – above the
frequency indicates a negative offset. If
neither +, nor – appears, the transceiver is
set for simplex operation.
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The transceiver’s default repeater offset is
600 kHz for the VHF band and 5 MHz for the
UHF band. As the display shows all
frequencies in MHz, you see
$,&& $,&& $,&& $,&&
(MHz) for
VHF and
+$&&& +$&&& +$&&& +$&&&
(MHz) for UHF.
± ± ± ±
1. Repeatedly press
6
or
7
until
L>< L>< L>< L>< HFJ HFJ HFJ HFJ
appears.
2. Repeatedly press
8
or
9
, or rotate CH
to change the offset to a new value
ranging from .000 to 8.000 MHz.
3. Press
7
until
K>< K>< K>< K>< HFJ HFJ HFJ HFJ
appears.
4. Repeatedly press
8
or
9
, or rotate CH
to change the offset to a new value
ranging from .000 (no offset) to 8.000
MHz.
5. Press or PTT to store the setting and
exit.
6
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2'4#6+10
"
1 0 11 (( " #0& "% *#0)+0) "6 *' "
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To use the transceiver with a repeater, you
must set either a + or – repeater offset
direction. To turn on operation for use with a
repeater in the VFO mode, press
F + + / – . The
current offset indicator (+ or –) appears. To
turn off repeater operation, repeatedly press
F + + / – until neither + or – appears.
If you want to reverse the repeater input and
output frequencies, press
F + REV .
/'/14;"12'4#6+10
Your transceiver has 100 standard memory
locations that you can use to store
frequencies for quick access. You can store
frequencies used for the VHF, UHF, AIR, and
WX bands. When you store a frequency,
other settings associated with that frequency
(such as the repeater offset and CTCSS
tones) are stored as well.
± ± ± ±
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( 4'37'0%;
1. Select the frequency you want to store.
Once you select a frequency, the other
values such as the repeater offset and
the CTCSS tones for that repeater are
also stored in the memory location. To
select other settings, see “Setting the
Repeater Offset Frequency” on Page 5,
“Setting the CTCSS Tones” on Page 6,
and “Using DTMF Code” on Page 7.
2. Press F + MW . o flashes and the lowest
vacant memory location appears.
3. Repeatedly press
8
or
9
or turn CH to
select the desired memory location.
4. Press MW or F + MW again to store the
selected frequency and exit the memory
mode. If a memory location already has
a frequency stored in it, the new
frequency is stored in its place.
4
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To recall a saved memory location, press MR .
o
appears and the last used memory
± ± ± ±
"016'"
± ± ± ±
"
Setting the Repeater Offset Frequency
This setting only affects the VFO mode. If you
saved a frequency offset in a memory location,
that setting is not affected.
Memory Operation
You cannot activate or deactivate the power
save, auto power-shut off, time-out timer,
frequency step, key tone on and off, and call
features in memory mode.