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(TNC). See the following diagram for a
suggested connection. Refer to your TNC
instructions for details.
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To lock the transceiver’s keypad so you do
not accidentally change a setting, press
F
+
LOCK
(
DW
). This locks all buttons except
PTT
,
PWR
,
F
, and
M
.
To unlock the keypad, press
F
+
LOCK
(
DW
)
again.
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When you press any key except
PTT
or
F
, the
backlight turns on for about 5 seconds. Press
M
to turn on the backlight.
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The transceiver is preset to sound a beep
each time you press a key. To turn off the
beep, press
F
+
BEEP
.
8F
8F8F
8F
-
E<<
E<<E<<
E<<
briefly appears.
To have the beep sound again, press
F
+
BEEP
again.
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Follow these steps to change the frequency
increment used during scanning and
stepping to a frequency.
1. Press
F
+
STEP
.
IJ;Fý
IJ;FýIJ;Fý
IJ;Fý
and the current step
setting (in kHz) appear.
2. Repeatedly press
8
or
9
or
CH
until
the desired new setting appears. You
can change the frequency step to 5 kHz,
6.25 kHz, 7.5 kHz, 10 kHz, 12.5 kHz, 15
kHz, 20 kHz, 25 kHz, or 50 kHz.
3. Press
or
PTT
to store your selection.
219'4"5#8'
Power save conserves battery power by
turning off power to the receiver part of the
transceiver and turning it on briefly every 8
seconds to check for a transmission.
To enable power save, press
F
+
PS
(
5
).
p
appears.
To disable power save, press
F
+
PS
(
5
).
p
disappears.
±
±±
±
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Follow these steps to have the transceiver
automatically turn off after a preset period of
non-use.
1. Press
F
+
APO
(
3
). Auto Power Shutoff is
normally disabled.
e<<
e<<e<<
e<<
appears.
2. Repeatedly press either
8
or
9
, or
turn
CH
to select a time period until
power shutoff. You can select
e<<
e<<e<<
e<<
,
)&
)&)&
)&
,
,&
,&,&
,&
,
/&
/&/&
/&
or
'(&
'(&'(&
'(&
minutes.
3. Press
PTT
or
to store your selection
and exit.
To turn off auto power-shutoff, press
F
+
APO
again and select
e<<
e<<e<<
e<<
.
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When you communicate using repeaters,
keep your transmissions as brief as possible.
Most repeaters have built-in timers that limit
single transmissions to 3 minutes or less.
You can set the transceiver to stop
transmitting if you exceed a set time limit with
a single transmission.
To set a value for the time-out timer, press
F
+
TOT
(
4
). The default setting
e<<
e<<e<<
e<<
appears
along with
JEJ
JEJJEJ
JEJ
. Repeatedly press
8
or
9
,
or turn
CH
to select the desired time-out
interval (up to 20 minutes). When you select
a value for the time out feature,
JEJ
JEJJEJ
JEJ
appears.
Press
or
PTT
to store the setting and exit
to the VFO mode.
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The transceiver can receive seven NOAA
(National Oceanographic and Atmospheric
Administration) weather broadcast
frequencies. To listen to the channel
broadcasting in your location, repeatedly
press
to select the weather band.
MN
MNMN
MN
appears. Then rotate
CH
or repeatedly press
8
or
9
to select your local weather
channel from the following table.
75+0)"6*'"5#/'"#.'46
Traditional weather radios simply receive the
NOAA weather broadcast (usually within a
40-mile radius), then sound an alarm if any
emergency code was transmitted along with
the broadcast. People who live outside an
affected area are often alerted even when
their area is not affected, causing many of
HTX-420
TNC
Computer
±
±±
±
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±
±±
±
"
• When the transceiver receives no signal
within an 8-second period,
p
begins flashing
indicating power save is active.
• When the transceiver receives a signal
during the 8-second period,
p
remains
steady.
• The green signal indicator lights to indicate
that a signal has been received and that
power save is on stand-by.
• To use the transceiver for packet
communications, disable power save (see
“Using the Transceiver with Packet Radio”
on Page 7).
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