Operation; Setting The Squelch Level; Temporarily Opening Squelch - Radio Shack HTX-420 Owner's Manual

± ± ± ± ± ± ± ±
"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
8 9
using CH, or or .
• 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.
4
12'4#6+10
/
#07#.
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
the same time. Those key combination
instructions are printed as first button name,
+, then the second button name. For
example,
you press
Button names are printed in small, bold,
capital letters such as
symbols, and numbers that appear on the
display are printed using a distinctive
typeface, such as
6
740+0)
6
4#05%'+8'4
To turn on the transceiver, press
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
again.
PWR
5
'66+0)
Turn on the transceiver then repeatedly press
"
6 7
or
&+ &+ &+ &+
to ) and
8 9
or
setting. A higher number reduces noise in-
between transmissions while a lower number
allows you to hear a weak transmission.
Press
setting and exit squelch setting.
6
'/214#4+.;
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
normal operation, release
7 "
5+0)
-
';5
Repeatedly press
.
displays a frequency from the desired band.
The band changes in the following order:
VHF, UHF, AIR, WX.
Repeatedly pressing
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
"%
108'06+105
(function) and another button at
F
+ means hold down while
F TOT F
.
TOT
or . Words,
CLR MR
'*,$/*& '*,$/*& CH CH
'*,$/*& '*,$/*& CH CH
or .
"1 11 " "
0 (( 6*'
PWR
" "5 ".
6*' 37'.%* '8'.
until the current squelch setting (
IGB IGB
IGB IGB
appear. Repeatedly press
or rotate to change the squelch
CH
or (Push to Talk) to store the
PTT
"1 "
2'0+0)
. To resume
M
. ± ± ± ±
M
"7 "6
6*' 0+8'45#. ;2'
until the transceiver
6 7
or allows
IGB IGB
IGB IGB
setting mode.
JN JN JN JN JED; JED; JED; JED; ZJC< ZJC< ZJC< ZJC< 7H;7 7H;7 7H;7 7H;7
, ,
8 9
Press or , or rotate
value of the selected setting. Press
to store the setting and exit.
PTT
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)
6 +"
70+0) #0&
6
4#05/+55+105
1. Repeatedly press
desired receiving mode (VHF, UHF, Air,
Weather).
2. Select a frequency using one of the
following methods.
Using
: Rotate
CH
. The 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 while rotating
F
frequency by 1 MHz increments
regardless of the selected step
frequency.
&& && && &&
8
Using
and
hold down)
frequency appears. Hold down
8
pressing
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 to a comfortable listening
VOL
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.
L>< HFJ L>< HFJ K>< HFJ K>< HFJ HN HN HN HN JED; JED;
L>< L>< HFJ HFJ K>< K>< HFJ HFJ JED; JED;
, , , ,
I7C; I7C; I7C; I7C;
, and appear.
to change the
CH
or
"*&
4'37'0%+'5 +4'%6
"4 "
'%'+8+0)
to select the
clockwise or
CH
to change the
CH
9
: Repeatedly press (or
8 9
or until the desired
while
F
9
or to change the
.
"