Radio Shack HTX-420 - Manual (Page 4)

4
12'4#6+10
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#07#.
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108'06+105
Your transceiver's buttons perform multiple
functions. The abbreviation or symbol for a
function is printed on, above, or below each
button.
To activate certain transceiver features, you
must press
F (function) and another button at
the same time. Those key combination
instructions are printed as first button name,
+, then the second button name. For
example,
F + TOT means hold down F while
you press TOT .
Button names are printed in small, bold,
capital letters such as
CLR or MR . Words,
symbols, and numbers that appear on the
display are printed using a distinctive
typeface, such as
'*,$/*& '*,$/*& '*,$/*& '*,$/*&
or
CH CH CH CH
.
6
740+0)
"1
0
11
((
"
6*'
"
6
4#05%'+8'4
To turn on the transceiver, press PWR . The
radio beeps once if the key tone feature is
enabled. Then the current battery voltage
briefly appears and the last used frequency
appears. To turn the transceiver off, press
PWR again.
5
'66+0)
"
6*'
"5
37'.%*
".
'8'.
Turn on the transceiver then repeatedly press
6
or
7
until the current squelch setting (
&& && && &&
to
&+ &+ &+ &+
) and
IGB IGB IGB IGB
appear. Repeatedly press
8
or
9
or rotate CH to change the squelch
setting. A higher number reduces noise in-
between transmissions while a lower number
allows you to hear a weak transmission.
Press
or PTT (Push to Talk) to store the
setting and exit squelch setting.
6 '/214#4+.; "1 2'0+0) "
5 37'.%*
If you use the Tone Squelch (CTCSS) feature
(see “Setting the CTCSS Tones” on Page 6),
you might not hear a transmission on the
current frequency. To temporarily open the
squelch so you can hear all transmissions on
the frequency, hold down
M . To resume
normal operation, release M . ± ± ± ±
7 5+0) " 6*' "7 0+8'45#. "6 ;2' "
-
';5
Repeatedly press until the transceiver
displays a frequency from the desired band.
The band changes in the following order:
VHF, UHF, AIR, WX.
Repeatedly pressing
6
or
7
allows
selection of squelch, VHF repeater offset,
UHF repeater offset, receive tone squelch
(CTCSS), transmit tone squelch (CTCSS),
DTMF, SAME area code, and SAME on/off
setting mode.
IGB IGB IGB IGB
,
L>< L>< L>< L>< HFJ HFJ HFJ HFJ
,
K>< K>< K>< K>< HFJ HFJ HFJ HFJ
,
HN HN HN HN JED; JED; JED; JED;
,
JN JN JN JN JED; JED; JED; JED;
,
ZJC< ZJC< ZJC< ZJC<
,
7H;7 7H;7 7H;7 7H;7
, and
I7C; I7C; I7C; I7C;
appear.
Press
8
or
9
, or rotate CH to change the
value of the selected setting. Press or
PTT to store the setting and exit.
The detailed operation for squelch, VHF
repeater offset, UHF repeater offset, receive
tone squelch (CTCSS), transmit tone squelch
(CTCSS), DTMF, SAME area code, and
SAME on/off is described in the relevant
sections.
5 '.'%6+0) "( 4'37'0%+'5 "*& +4'%6 "
6 70+0) +" #0& "4 '%'+8+0) "
6 4#05/+55+105
1. Repeatedly press to select the
desired receiving mode (VHF, UHF, Air,
Weather).
2. Select a frequency using one of the
following methods.
Using CH : Rotate CH clockwise or
counterclockwise to select a frequency
(or channel for the weather band). The
frequency changes in increments you
set (see “Setting the Frequency Step” on
Page 8) for each rotation click. Hold
down
F while rotating CH to change the
frequency by 1 MHz increments
regardless of the selected step
frequency.
Using
8
and
9
: Repeatedly press (or
hold down)
8
or
9
until the desired
frequency appears. Hold down F while
pressing
8
or
9
to change the
frequency by 1 MHz increments.
Using Direct Key Entry: Use the number
keys to directly enter a frequency,
including the three numbers to the right
of the decimal. (You do not enter the
decimal point.)
± ± ± ±
3. Set VOL to a comfortable listening
level. ± ± ± ±
6 4#05/+66+0)
There are two basic types of communication
possible with this transceiver: radio-direct-to-
radio (simplex) or radio-to-repeater-to radio
(duplex). Simplex uses the same frequency
to send and receive. Duplex uses one
frequency to transmit and another to receive.
For more information about duplex, see
“Understanding Repeaters” on Page 5.
.
1. Select the desired transmit band VHF/
UHF and frequency using manual or
direct entry.
2. Hold the transceiver about 3 inches from
your mouth.
± ± ± ±
"016'"
± ± ± ±
"
Temporarily Opening Squelch
The current setting for Squelch, Repeater Offset
for the selected band, RX Tone, and TX Tone
can be displayed by pressing and holding M.
(see “Setting the CTCSS Tones” on Page 6).
Selecting Frequencies and Receiving
Transmissions
• When you directly enter a frequency, the
transceiver accepts only six digits and it
automatically rounds down the last digit of
the frequency to 0 or 5. For example, if you
enter 440.244, your transceiver accepts it as
440.240. If you enter 440.248, the
transceiver accepts it as 440.245. If you set
the frequency step to 6.25 kHz, 7.5 kHz, or
12.5 kHz, you need to select frequencies
using CH, or
8
or
9
.
• If the transceiver picks up unwanted, weak
transmissions, set the squelch to a different
level (See “Setting the Squelch Level” on
Page 4).
.
"%#76+10"
.
It is illegal to transmit if you do not have at least a
Technician Class license issued by the FCC.