Radio Shack HTX-420 User Manual

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OWNER’S MANUAL — Please read before using this equipment.

 

 

 

 

 

 

 

 

 

 

%106'065

 

 

 

Thank you for purchasing a RadioShack HTX-4202-Meter/70cm Dual Band FM Amateur

 

 

Preparation ..................................................................

 

2

 

 

Transceiver. Your transceiver is compact and rugged, making it easy to carry almost anywhere.

Using Internal Batteries ...........................................

 

2

 

 

The crystal controlled circuitry provides accurate and stable frequency selection, making it an

Using AC or DC Power ............................................

 

2

 

 

ideal choice for your amateur communications needs.

Connecting the Antenna

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

Attaching the Belt Clip .............................................

 

2

 

 

Electronic Compass —

provides two letters to

 

 

 

 

 

 

Attaching the Wrist Strap

 

2

 

 

 

 

 

 

 

 

 

 

 

indicate direction (such as SW or NW) and up to

 

 

 

 

 

 

Connecting a Microphone/Speaker .........................

2

 

 

 

 

 

 

 

 

A Quick Look At the Display ........................................

 

3

 

 

three digits to show directional angle (such as

 

 

 

 

 

 

Operation .....................................................................

 

4

 

 

360°, 180°, 90° or 45°). See “Using the

 

 

 

 

 

 

Manual Conventions

 

4

 

 

 

 

 

 

 

 

 

 

 

Electronic Compass” on page 9.

 

 

 

 

 

 

Turning On/Off the Transceiver

 

4

 

 

 

 

 

 

 

 

................................

 

 

 

 

 

 

 

 

 

 

Setting the Squelch Level

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temporarily Opening Squelch ..................................

 

4

 

 

 

 

 

 

 

 

 

 

Using the Universal Type Keys ................................

 

4

 

 

Full 16-KeyDTMF(Dual-ToneMulti

 

 

 

 

 

 

Selecting Frequencies (Direct Tuning) and Receiving

 

 

 

 

 

 

 

Transmissions ..........................................................

 

4

 

 

Frequency) Keypad —

lets you dial and

 

 

 

 

 

 

Transmitting .............................................................

 

4

 

 

make telephone connections. See

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Understanding Repeaters ............................................

 

5

 

 

“Transmitting a DTMF Code” on page 7.

 

 

 

 

 

 

Setting the Repeater Offset Frequency

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Turning Repeater Operation On/Off and Changing

 

 

 

 

 

 

 

 

 

 

 

The Offset Direction .................................................

 

5

 

 

Programmable Frequency Steps — let

 

 

 

 

 

 

Memory Operation

 

5

 

 

 

 

 

 

 

 

 

 

 

you set the frequency increment for

 

 

 

 

 

 

Storing a Transmit/Receive Frequency ....................

5

 

 

 

 

 

 

 

 

Recalling Memory Locations ....................................

 

5

 

 

tuning or scanning to steps of 5, 6.25, 7.5,

 

 

 

 

 

 

Checking Memory Location Settings .......................

6

 

 

10, 12.5, 15, 20, 25, or 50 kHz. See

 

 

 

 

 

 

Clearing a Single Memory .......................................

 

6

 

 

“Setting the Frequency Step” on page 8.

 

 

 

 

 

 

Using the Calling-Frequency Memory

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Scanning Operation .....................................................

 

6

 

 

 

 

 

 

 

 

 

 

Scanning for Active Frequencies .............................

6

 

 

SAME Weather Alert —

uses Specific

 

 

 

 

 

 

Scanning Standard Memory Locations ....................

6

 

 

 

 

 

 

 

 

Skipping Memory Channels While Scanning ...........

6

 

 

Area Message Encoding (SAME) digital

 

 

 

 

 

 

Continuous Tone Coded Squelch System Features

 

 

 

information to determine and display the

 

 

 

 

 

 

(CTCSS)

 

6

 

 

 

 

 

 

 

 

 

 

 

level of weather events. See “Using the

 

 

 

 

 

 

Setting the CTCSS Tones

 

6

 

 

 

 

 

 

 

 

 

 

 

SAME Alert” on page 8.

 

 

 

 

 

 

 

Using the CTCSS Tones ..........................................

 

7

 

 

 

 

 

 

 

 

 

Using DTMF Code .......................................................

 

7

 

 

 

 

 

 

 

 

 

 

Transmitting a DTMF Code

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Using the Transceiver with Packet Radio ................

7

 

 

 

 

 

 

 

 

 

 

Locking the Keypad .................................................

 

8

 

+0641&7%6+10"61"

 

 

 

 

 

 

Lighting the Display .................................................

 

8

 

and want nothing to do with “bootleggers” –

Turning the Key Tone On and Off ............................

8

 

their term for people who operate without a

Setting the Frequency Step

 

8

 

#/#6'74"4#&+1

 

 

license. ±

Power Save .............................................................

 

8

 

 

 

 

Using Auto Power Shutoff ........................................

 

8

 

 

Amateur radio is a great hobby that has

 

 

 

 

 

 

Limiting Transmit Duration (Time-Out Timer)

8

 

 

If you do not hear anyone talking about a

 

 

enriched the lives of millions of people all

Tuning the Weather Radio Frequencies ..................

8

 

 

local club as you listen to local transmissions,

Using the SAME Alert

 

8

 

 

over the world. Your transceiver is the perfect

 

 

 

write to the American Radio Relay League

Using the Electronic Compass .................................

 

9

 

 

first radio for anyone entering the exciting

Selecting the Transmit Power

 

10

 

 

(ARRL) at the following address to find out

 

 

 

world of amateur radio, or as a great

Cross Band Channel Operation

 

10

 

 

.............................

 

 

how to contact a local affiliate. The ARRL is

Dual Watch ............................................................

 

10

 

 

additional transceiver for the experienced

Receiving the Air Band

 

10

 

 

the national organization representing

 

 

 

amateur radio operator. Your transceiver

Changing the Transmit Frequency Range .............

10

 

 

amateur radio in the United States. The

FCC Information

 

10

 

 

opens a door for you to the world from almost

 

 

 

league has more than 150,000 members.

Care ...........................................................................

 

10

 

 

anywhere! All you need is an Amateur Radio

ERR Display

 

10

 

 

Most are ham operators, or members in the

 

 

 

Operator's License (Technician Class or

Service and Repair ....................................................

 

11

 

 

process of obtaining their license.

Resetting the Transceiver

 

11

 

 

higher) issued by the Federal

 

 

 

 

 

 

 

 

 

Specifications ............................................................

 

11

 

 

Communications Commission (FCC). If you

The American Radio Relay League

 

 

 

 

 

 

 

 

 

 

do not have a license, it is easy to get one,

#"+/2146#06"#

 

 

 

225 Main Street

 

 

 

and help from licensed operators is available.

If an icon appears at the end of a paragraph, go

 

 

Newington, CT 06111

 

 

Find out if there is a ham radio club in your

to the box on that page with the corresponding

 

 

http://www.arrl.org

 

 

area. Most clubs welcome newcomers and

icon for pertinent information.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

are glad to help you get your license. Here

 

 

 

 

 

 

Rý— Warning

# — Important

 

 

 

Start studying for the license exams. Most

 

 

 

are a few tips to help you get started.

. — Caution

± — Note

 

 

 

people can go from knowing absolutely

 

 

 

 

 

 

 

 

 

 

You can turn on your transceiver and scan

nothing about amateur radio to passing the

 

 

 

 

 

 

 

 

 

 

Technician written exam in less than a

±"016'"±"

 

 

 

the entire band to hear what is going on;

 

 

 

month.

 

 

 

however, do not attempt to transmit until

You must have a Technician Class or higher

 

 

 

 

 

 

 

 

 

 

 

 

you get your license. If you transmit without

The exams test your knowledge of basic

Amateur Radio Operator's License, and a call

 

 

 

a license, you are in violation of federal law

sign issued by the FCC, to legally transmit using

 

 

radio regulations and elementary radio

 

 

that can lead to severe penalties. Ham

this transceiver. Transmitting without a license

 

 

theory. Many clubs hold license classes

 

 

operators take the FCC rules very seriously

carries heavy penalties.

 

 

 

 

which can be a fun and easy way to learn

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

© 2002 RadioShack Corporation.

All Rights Reserved.

RadioShack and RadioShack.com are trademarks used by RadioShack Corporation.

ýR"9#40+0)"R"

Using the Lithium-IonRechargeable Battery Pack

When you remove the battery pack from the transceiver, be sure to turn off the transceiver before you remove the battery pack.

Using AA Batteries

When you remove the battery holder to replace the batteries, be sure to turn off the transceiver before you remove the battery holder.

Dispose of old batteries promptly and properly. Do not burn or bury them.

."%#76+10".

Using the Lithium-IonRechargeable

Battery Pack

The supplied adapter is designed only to recharge the battery pack. Do not attempt to transmit using the adapter to power the radio.

Use a coin or other solid object to unlatch the lock tab when you remove the battery pack.

Using AA Batteries

Use only fresh batteries of the required size and recommend type.

Always remove old or weak batteries. Batteries can leak chemicals that destroy electronic circuits.

Do not mix old and new batteries, different types of batteries (standard or alkaline).

If you do not plan to use the transceiver with batteries for two weeks or more, remove the batteries.

Using AC or DC Power

You must use a Class 2 power

source that supplies 12V DC and

!

delivers at least 2A. Its center tip

must be set to positive and its plug

must fit the transceiver’s EXT jack. Using a power supply that does not meet these specifications could damage the transceiver or the power supply.

Always connect the power cable to the transceiver before you connect it to the power source. When you finish, disconnect the cable from the power source before you disconnect it from the transceiver.

Connecting the Antenna

Do not over-tightenthe antenna.

±"016'"±"

Using the Lithium-IonRechargeable

Battery Pack

The battery pack’s indicator does not change to green if you use the transceiver while charging the battery pack.

Using a pencil eraser, clean the charging contacts on lithium-ionbattery pack.

Connecting the Antenna

You can connect an external antenna to the transceiver using an SMA-to-BNCadapter. The adapter and suitable antennas are available at your local RadioShack store.

about amateur radio. There are good books, cassette tapes, computer programs, and many other study aids available. Your local RadioShack store sells FCC License Preparation study guides for amateur radio operator licenses. While you are no longer required to learn Morse code for a Technician Class license, we encourage you to learn it so you can advance to higher levels of operating privileges.

There is a small fee required for taking the Technician exam. All license level tests are administered by a three-memberVolunteer Examiner Team. Contact the ARRL for a schedule of exam opportunities in your area.

The Technician Class license lets you use the transceiver to communicate directly with other operators, and use repeaters for distant communication.

24'2#4#6+10

You can power your transceiver using internal batteries, AC power or vehicle battery power (using a RadioShack 270-031power cable, not supplied, available at your local RadioShack store or online at www.RadioShack.com).

75+0)"+06'40#."$#66'4+'5

You can power the transceiver using the supplied lithium-ionrechargeable battery pack and its supplied adapter or four AA alkaline batteries (not supplied), available at RadioShack.

75+0)"6*'".+6*+7//+10" 4'%*#4)'#$.'"$#66'4;"2#%-

Before you use the lithium-ionrechargeable battery pack, you must charge it. The battery pack has abuilt-incharging circuit.

To charge the battery pack, connect the supplied AC adapter to the battery pack’s DC 12V jack. Then plug the adapter’s other end into a standard AC outlet. If you have installed the battery pack to the transceiver, turn off the transceiver. The indicator on the battery pack lights red while charging and lights green when the charging finishes. A fully discharged battery pack can take as long as 10 hours to fully recharge. R". ±

When the battery pack is fully charged, unplug the adapter from the AC outlet, then disconnect the adapter from the battery pack.

Install the battery pack by inserting its upper edge first then press it down. Then lift and press down the lock tab to secure the battery pack.

When • appears, recharge the battery. .#

±

75+0)"##"$#66'4+'5

You can power your transceiver using four alkaline AA batteries (not supplied and available at your local RadioShack store) with the supplied battery holder. R".

1.Insert four AA batteries into the supplied battery holder according to the polarity symbols (+ or –)marked on the holder.

2.Attach the battery holder onto the transceiver and fasten the lock tab.

When • appears, replace the batteries.

75+0)"#%"14"&%"219'4

To power the transceiver from an AC outlet or your vehicle’s battery power, you need a 12V regulated DC power supply that delivers at least 2A (for AC) and a RadioShack 270-031power cable (not supplied, available at RadioShack). Another type of cable might not work with your transceiver..

1.For AC power, if the power supply has a voltage switch, set the switch to 12V.

2.Insert the power cable’s cord into the transceiver’s EXT jack.

3.For AC power, connect the other end of the power cable to the power supply, then plug the power supply’s power cord into the power source.

For DC power, plug the other end of the power cable into the vehicle’s cigarette lighter socket.

%100'%6+0)"6*'"#06'00#

Place the threaded base socket of the supplied antenna over the antenna connector on top of the transceiver and turn the antenna clockwise to tighten it. To remove the antenna, turn it counterclockwise. . ±

#66#%*+0)"6*'"$'.6"%.+2

Use a Phillips screwdriver and the two supplied screws to attach the supplied belt clip to your transceiver. Do not overtighten the screws.

#66#%*+0)"6*'"94+56"564#2

To attach the supplied wrist strap to the top of the belt clip, thread the strap's small loop through the opening in the top of the clip. Then insert the longer loop through the smaller loop and pull on the strap until the loop is tight.

%100'%6+0)"#"/+%412*10'1 52'#-'4

You can connect an external communications headset (consisting of a microphone and speaker) to the transceiver so you can use it privately. Lift the hinged,

2

rubber dust cover from the SPK andMIC jacks on top of the transceiver. Then insert the plug of an optionalvoice-activatedheadset with microphone, or an optional communication headset, into the jacks.. ±

You can also connect an optional mono earphone to the SPK jack. This lets you use the transceiver'spush-to-talkbutton (PTT) to transmit as usual. Your local RadioShack store carries a wide selection of suitable communications headsets, earphones, and separate components.

The following schematic diagram shows the typical wiring for an external mic and speaker.

#"37+%-".11-"#6"6*'"&+52.#;

1

2

3

4

5

6

7

16

 

 

 

 

 

8

15

 

 

 

 

 

9

 

 

 

 

 

 

 

 

 

 

 

 

10

14

 

 

 

 

 

 

13

 

12

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

1. y— appears when F (function) key is pressed.

2.J — appears when Tone Squelch (CTCSS) is enabled for transmitting. SQ appears when Tone Squelch (CTCSS) is enabled for receiving. TSQ appears when Tone Squelch (CTCSS) is enabled for transmitting and receiving.

3.+ — appears to indicate a positive repeater offset.indicates a negative offset.

4.JEJ — appears when a time for the timeout timer is selected.

5.7F — appears when Auto Power Off is enabled.

6.r— appears when the SAME alert is enabled. The icon flashes when the transceiver is out of range.

7.í — indicates the battery strength.

8.z— indicates the keypad control is disabled to prevent accidental setting changes.

9.q — appears when you use the cross band feature.

10.o (Memory Channel Recall) — appears when you recall a memory channel.

11.2-DigitNumber belowo — indicates memory location number.

12.Sub Frequency Display (appears on the bottom of the display) — shows the transmit frequency and other settings. In the compass mode, the display shows direction indicator and angles in degree.

13.Signal Strength/Power Meter — shows the relative signal strength or power level.

14.p — appears and flashes when power save is on.

15.C — indicates the output power is middle.B indicates the output power is low. When neither of these appears, the output power is high.

16.Main Frequency Display (appears in the middle of the display) — shows the receive frequency.

17.7 — appears when the transceiver tunes to the air band. (Not shown on this display.)

."%#76+10".

Use only microphone and speaker accessories that do not share a common ground for the speaker and the microphone. Doing otherwise might damage the transceiver.

±"016'"±"

Connecting a headset’s plug to the transceiver’s SPK jack automatically disconnects the internal speaker.

3

±"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, or8or9.

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.

12'4#6+10

/#07#."%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 downF while you pressTOT.

Button names are printed in small, bold, capital letters such as CLR orMR. Words, symbols, and numbers that appear on the

display are printed using a distinctive typeface, such as '*,$/*& orCH.

6740+0)"1011(("6*'" 64#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, pressPWR again.

5'66+0)"6*'"537'.%*".'8'.

Turn on the transceiver then repeatedly press 6 or7 until the current squelch setting (&& to&+) andIGB appear. Repeatedly press

8 or9 or rotateCH to change the squelch setting. A higher number reduces noise inbetween transmissions while a lower number allows you to hear a weak transmission. Press orPTT (Push to Talk) to store the setting and exit squelch setting.

6'/214#4+.;"12'0+0)"

537'.%*

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, releaseM.±

75+0)"6*'"70+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 6or7 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,L>< HFJ,K>< HFJ,HN JED;,JN JED;,ZJC<,7H;7, andI7C; appear.

Press 8 or9, or rotateCH to change the value of the selected setting. Press orPTT 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"

670+0)+"#0&"4'%'+8+0)"

64#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: RotateCH 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 downF while rotatingCH to change the frequency by 1 MHz increments regardless of the selected step frequency.

Using 8 and9: Repeatedly press (or hold down)8 or9 until the desired

frequency appears. Hold down F while pressing8 or9 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.±

64#05/+66+0)

There are two basic types of communication possible with this transceiver: radio-direct-to-radio (simplex) orradio-to-repeater-toradio (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.

4

3.Hold down PTT (Push to Talk), then speak slowly and clearly into the microphone.

4.Release PTT when you finish transmitting.

70&'456#0&+0)" 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-powersignal 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-cmband) 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 aabove the frequency indicates a negative offset. If neither+, norappears, the transceiver is set for simplex operation.

5'66+0)"6*'"4'2'#6'4"1((5'6" (4'37'0%;

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 or7untilL>< HFJ appears.

2.Repeatedly press 8or9, or rotateCH to change the offset to a new value ranging from .000 to 8.000 MHz.

3.Press 7 untilK>< HFJ appears.

4.Repeatedly press 8or9, or rotateCH 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.

 

6740+0)"4'2'#6'4"12'4#6+10" 1011(("#0&"%*#0)+0)"6*'" 1((5'6"&+4'%6+10

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 pressF++/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. ±

5614+0)"#"64#05/+614'%'+8'" (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 8or9or turnCH to select the desired memory location.

4.Press MW orF+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'%#..+0)"/'/14;".1%#6+105

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-shutoff,time-outtimer, frequency step, key tone on and off, and call features in memory mode.

5

±"016'"±"

Clearing a Single Memory

You cannot clear memory location number 1.

Skipping Memory Channels While Scanning

You cannot skip memory channel &'.

location number appears beneath o. Then turnCH or press8#or9 to select a different memory location. To return to VFO, press .

%*'%-+0)"/'/14;".1%#6+10" 5'66+0)5

To check all the settings stored in a memory location, press MR, then rotateCH (or use8 or9) to select the desired memory location. Then hold downM. The settings stored in the memory location appear in sequence starting with the squelch setting value and ending with the frequency.

%.'#4+0)"#"5+0).'"/'/14;

Follow these steps to clear any single memory location. (To clear all memory locations, see “Resetting the Transceiver” on Page 11.)

1.Press MR.o and the last used memory location number appear.

2.Repeatedly press 8 or9, or rotateCH, to select the desired memory location.

3.Press F+CLR (6). The selected memory location is cleared.±

75+0)"6*'"%#..+0)/(4'37'0%;" /'/14;

The calling-frequencymemory location lets you quickly jump to a specific frequency. The preset calling frequency is 146.520 MHz in the VHF band and 446.000 MHz in the UHF band. You can store a different frequency into this memory, as well as other settings associated with that frequency, such as the repeater offset and CTCSS tone. You can use this feature when the transceiver is in VFO mode.

Press CALL to display the current calling frequency. The frequency (such as 146.520) and9 appear. PressCALL again to return to VFO mode.

To change the stored frequency, select a new frequency, then press F+CALL (CM).

5%#00+0)"12'4#6+10

5%#00+0)"(14"#%6+8'" (4'37'0%+'5

1.To search for activity on a frequency, press SC. The transceiver begins to scan up or down the band’s full frequency range. The decimal point flashes as the transceiver scans. The displayed frequency stops on each active frequency for 8 seconds.

2.To change the scan direction, press 8 or9 or rotateCH.

3.To stop on a frequency or to stop scanning, press SC orPTT.

5%#00+0)"56#0&"/'/14;"

.1%#6+105

1.Press MR (soo appears), then pressSC. The decimal point flashes while the transceiver scans all but empty locations.

2.To change the scanning direction, press 8 or9 or rotateCH.

3. To stop scanning, press SC,PTT, or .

5-+22+0)"/'/14;"%*#00'.5" 9*+.'"5%#00+0)

While scanning memory channels, you can skip channels you do not want to receive. You cannot use this feature for normal frequencies.

To skip a channel, select the channel in memory mode, then press F+M(SKIP). o flashes. Press SCto scan memory channels. You can also skip a channel when the transceiver stops while scanning by pressing F+M(SKIP). The transceiver resumes scanning after you press F+M(SKIP).±

To clear a channel (turn off skip) skip memory, press F+M (SKIP).

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Your transceiver can transmit and receive a low-level,selectable subaudible tone at the same time as it receives (RX) or transmits (TX) a regular signal. This special tone lets you listen only to other radios set to the same tone frequency when you use the transceiver in simplex operation. The CTCSS feature also lets you match yourHTX-420to the subaudible tone frequency used by a local repeater.

5'66+0)"6*'"%6%55"610'5

To set the RX and TX tones for the transceiver, follow these steps.

1.Repeatedly press 6or7untilHNýJED; appears.

2.Press 8 or9, or rotateCH to select a frequency or no frequency (9J9IIýe\\) from the table Page 7.

3.Press 7 untilJN JED; appears.

6

4.Press 8 or9, or rotateCH to select a tone frequency from the list on Page 7.

5. Press

or PTT to store the settings

and exit.

 

75+0)"6*'"%6%55"610'5

You can use a transmit tone, a receiver tone, or both. For example, if the selected repeater uses a receive only CTCSS tone, enable the transmit tone but not the receive tone on the HTX-420.

To enable only the transmit (TX) tone, press

F+T.SQL (1).J appears above the displayed frequency. PressPTT to store the setting.

To enable only the receive (RX) tone, press

F+T.SQL (1) again.IG appears above the displayed frequency. PressPTT to store the setting.

To enable both the transmit (TX) andreceive (RX) tones, press F+T.SQL (1) again. JIG appears above the displayed frequency. Press PTT to store the setting.

When you store a frequency in one of the 100 memory locations, all settings chosen for the selected frequency are stored as well. Before you store a frequency (see “Storing a Transmit/Receive Frequency” on Page 5), select the Subaudible Tone Frequencies first.

5WDCWFKDNG"6QPG"(TGSWGPEKGU"**\+

67.0

118.8

183.5

69.4

123.0

186.2

71.9

127.3

189.9

 

 

 

74.4

131.8

192.8

77.0

136.5

196.6

 

 

 

79.7

141.3

199.5

82.5

146.2

203.5

 

 

 

85.4

151.4

206.5

88.5

156.7

210.7

 

 

 

91.5

159.8

218.1

94.8

162.2

225.7

 

 

 

97.4

165.5

229.1

100.0

167.9

233.6

 

 

 

103.5

171.3

241.8

107.2

173.8

250.3

 

 

 

110.9

177.3

254.1

 

 

 

114.8179.9

75+0)"&6/("%1&'

DTMF (Dual-ToneMulti Frequency) tones are those typically associated with the use of your telephone. Your transceiver can transmit up to 16 separate DTMF tones and store a sequence of tones in up to 6 different memory locations (d1 to d6). You can use DTMF to transmit to aland-patchthat is connected to a telephone line. This also lets you enable or disable certain repeater

functions, which is handy if you are involved with repeater administration. You can also signal to another radio equipped to receive DTMF codes.

1.Repeatedly press 6 or7 untilZJC<

appears. If no DTMF codes are stored in memory, UýUýUýýUýUýU andZýb appear.

2.Repeatedly press 8 or9, or turnCH to select the desired DTMF memory location.

3.Enter up to 16 characters (0 through9, andA throughF; E= , F=#). The radio sounds a short beep for each entry, and a long beep to indicate the sixteenth character. If you try to enter more than 16 characters, the radio sounds two short beeps.

4.To confirm the DTMF characters, hold down F and rotateCH, or press8or9 to scroll it. If you make an entry error, pressF+CLR (6) and repeat Step 3 again.

To enter another DTMF sequence, repeat Steps 2–4.

5. Press or PTT to store the sequence in the selected memory location. The transceiver returns to the VFO mode.

64#05/+66+0)"#"&6/("%1&'

You can transmit a DTMF code from stored memory or by direct entry.

64#05/+66+0)"#"&6/("%1&'" (41/"5614'&"/'/14;

1.Press F+D.SEL. The last stored DTMF sequence appears.

2.Repeatedly press 8#or9, or rotateCH until you see the desired DTMF memory location. Then pressPTT to exit.

3.Select a transmit frequency (see “Selecting Frequencies (Direct Tuning) and Receiving Transmissions” on Page 4).

4.Press PTT+ to transmit the selected DTMF code using the selected frequency.

64#05/+66+0)"#"&6/("%1&'" 75+0)"&+4'%6"'064;

1.Hold down PTT (Push to Talk).

2.Enter each character of the desired

DTMF code in order. The DTMF tone sounds to confirm your entry. ±

75+0)"6*'"64#05%'+8'4"9+6*" 2#%-'6"4#&+1

You can connect your transceiver directly to a packet radio terminal node controller

±"016'"±"

You can also hold down PTT and enter the first character of the DTMF sequence. Then, releasePTT and continue to enter the balance of the characters as long as you enter each character within one second of the proceeding character entry.

7

±"016'"±"

When the transceiver receives no signal within an 8-secondperiod,p begins flashing indicating power save is active.

When the transceiver receives a signal during the 8-secondperiod,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).

(TNC). See the following diagram for a suggested connection. Refer to your TNC instructions for details.

HTX-420

TNC

Computer

.1%-+0)"6*'"-';2#&

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, andM.

To unlock the keypad, press F+LOCK (DW) again.

.+)*6+0)"6*'"&+52.#;

When you press any key except PTT orF, the backlight turns on for about 5 seconds. PressM to turn on the backlight.

6740+0)"6*'"-';"610'"10" #0&"1((

The transceiver is preset to sound a beep each time you press a key. To turn off the beep, press F+BEEP.8F-E<< briefly appears. To have the beep sound again, pressF+BEEP again.

5'66+0)"6*'"(4'37'0%;"56'2

Follow these steps to change the frequency increment used during scanning and stepping to a frequency.

1.Press F+STEP.IJ;Fýand the current step setting (in kHz) appear.

2.Repeatedly press 8 or9 orCH 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.±

75+0)"#761"219'4"5*761((

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<< appears.

2.Repeatedly press either 8 or9, or

turn CH to select a time period until power shutoff. You can selecte<<,)&,,&,/& or'(& minutes.

3. Press PTT or

to store your selection

and exit.

 

To turn off auto power-shutoff,pressF+APO again and selecte<<.

.+/+6+0)"64#05/+6"&74#6+10" *6+/'/176"6+/'4+

When you communicate using repeaters, keep your transmissions as brief as possible. Most repeaters have built-intimers 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-outtimer, pressF+TOT (4). The default settinge<< appears along withJEJ. Repeatedly press8 or9, or turnCH to select the desiredtime-outinterval (up to 20 minutes). When you select a value for the time out feature,JEJ appears. Press orPTT 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 appears. Then rotateCH or repeatedly press8 or9 to select your local weather channel from the following table.

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9>#'

162.400

 

 

9>#(

162.425

9>#)

162.450

 

 

9>#*

162.475

9>#+

162.500

 

 

9>#,

162.525

9>#-

162.550

75+0)"6*'"5#/'"#.'46

Traditional weather radios simply receive the NOAA weather broadcast (usually within a 40-mileradius), 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

8

them to potentially ignore real weather warnings that can save lives.

In 1994, NOAA began broadcasting SAME (Specific Area Message Encoding) codes along with their standard weather broadcasts from local stations in your area. SAME codes identify the type of emergency and the specific geographic area (such as a county) affected by the emergency. Your transceiver receives, interprets, and displays information about the codes so you can determine if the emergency might affect your area. Only SAME-compatibleradios (such as this transceiver) are able to take advantage of this new technology.

Each SAME code identifies a specific geographic area (defined by the National Weather Service [NWS]), so your transceiver sounds an alert only when a weather emergency is declared in that area. This helps you more efficiently track the weather conditions in and around your area.

70&'456#0&+0)"5#/'"%1&'5

For the purpose of broadcasting weather information, the NWS divided the United States into regions by state and county (or parish, where applicable) then assigned a six-digitSAME code to identify each county or parish. For example, the code for Tarrant County, Texas, is 048439.

The first digit in a SAME code identifies the county subdivision, the next two digits identify the state, and the last three digits identify the county or parish. ±

Your transceiver can receive all SAME alert signals broadcast within about a 40-mileradius. To receive SAME alerts and broadcasts about weather occurring only in particular counties within that area, you can program up to nine SAME codes into the transceiver’s memory (see “Entering Your Area’s SAME Codes” on Page 9). For example, this lets you avoid hearing an alert that applies to an area within a40-mileradius but not necessarily to your county or parish.

6740+0)"10"6*'"5#/'"#.'46

When your local weather station broadcasts a weather alert signal, the transceiver sounds an alert tone and displays an alert code for 5 seconds, showing the level of alert being broadcast. Follow these steps to turn on the alert.

1. Repeatedly press

to select the

weather mode.

 

2.Repeatedly press 6 or7 untilI7C; appears.

3.Press 8 or9 to selected.rappears.

4. Press

or PTT to store the setting.

The transceiver displays one of the following codes when it receives an alert signal.

M7HD for Warning

M7J9> for Watches

IJCJ for Statement

J;IJ for Test

The weather alert operates only when the transceiver is in weather mode. ±

'06'4+0)";174"#4'#N5"5#/'" %1&'5

You can store up to nine SAME codes. Refer to the SAME codes at http:// www.nws.noaa.gov/nwr/indexnw.htm. for the corresponding codes for any specific area you wish to monitor for weather warnings or watches.

1.Repeatedly press 6 or7 until7H;7

appears. If no SAME codes are stored in memory, _ _ _ _ _ _ and 7' appear.

2.Repeatedly press 8 or9to select the desired memory location(A1–A9).

3.Enter your area’s SAME code using the number keys.

If you want to enter another SAME code, repeat Steps 2 and 3.

4. Press

or PTT to store the code and

exit.

 

75+0)"6*'"'.'%6410+%" %1/2#55

Your transceiver has an electronic compass that can display two digits of direction such as SE or NW and up to three digits of directional angle such as 360°, 180°, 90°, or 45° in five degree steps.

You must calibrate the electronic compass before using it.

1.Turn off the transceiver.

2.Place the transceiver horizontally on a flat surface that does not give off electrical or magnetic interference.

3.Hold down COMP and pressPWR.

4.Place your index finger on the side of the transceiver’s antenna and turn the transceiver clockwise or counterclockwise, twice, smoothly and continuously. Take 8 to 9 seconds to complete a circle.

5. Press PTT or .±

To use the electronic compass press F+COMP (H/L) to see the magnetic direction.

The display provides 8 primary directions; D,D;,;,I;,I,IM,M, andDM. If you press any

key, the compass display disappears. ±

±"016'"±"

Understanding SAME Codes

Most SAME codes begin with 0, which means the code represents an entire county. The NWS plans to eventually subdivide some large counties. When that happens, each subdivision will be assigned a digit from 1 through 9, resulting in codes such as 148439, 248439, and so on.

Turning on the SAME Alert

When the SAME code is detected, the audio is muted.

If you do not program any SAME codes into the transceiver’s memory, the transceiver detects all SAME signals when the SAME function is on.

Using the Electronic Compass

The compass is not intended to be used as a scientific instrument. The accuracy of the compass is affected by environmental

factors in the area where the radio is being used. 9E#;HH appears when the transceiver does not detect compass data. If9E#;HH appears, repeat Steps1–5tore-calibratethe

compass.

To use the electronic compass feature, you need to hold the transceiver within 30 degrees of a horizontal position.

9

±"016'"±"

Cross Band Channel Operation

You cannot transmit and receive at the same time.

Changing the Transmit Frequency Range

The extended transmit frequency range feature is only for MARS, CAP, and public service users. Once you change the setting to the extended ranges, be sure not to transmit on those frequencies unless you are licensed to do so.

5'.'%6+0)"6*'"64#05/+6"219'4

You can select one of the three transmitting power levels: High (no display), Mid (C appears), and Low (B appears). To select the level, repeatedly pressH/L.

%4155"$#0&"%*#00'." 12'4#6+10

You can select a transmit frequency in the VHF band and a receive frequency in UHF band or vise versa. Or, you can select a transmit frequency and a receive frequency in the same band. ±

1.Press F+XBO (SC). The main frequency

is duplicated at the sub frequency display. q appears to the right of the main frequency display.

2.Enter the transmit frequency on the main frequency display.

3.Press F+REV (8) to exchange the main frequency display and sub frequency display.

4.Enter the receive frequency on the main frequency display.

5.Press PTT to transmit using cross band.

To exit the cross band channel operation, press F+XBO (SC).

&7#."9#6%*

You can set the transceiver to check a specified channel every 2.5 seconds while receiving any other channel. If the transceiver finds a signal on the specified channel, it automatically switches to it.

1.Select a frequency you do not want to miss while you receive another frequency.

2.Press DW. The transceiver duplicates the selected frequency on the sub frequency display.

3.Select a frequency you want to receive on the main frequency display.

The transceiver scans the channel on the sub frequency display every 2.5 seconds.

If you press PTT, the transceiver transmits the frequency on the sub frequency display and the dual watch is canceled. If you want to transmit the frequency on the main frequency display, pressF+REV to exchange the frequencies.

If you hold down M, the transceiver scans for the frequency on the sub frequency display until you releaseM.

4'%'+8+0)"6*'"#+4"$#0&

Repeatedly press until 7 appears to select the airband at the top of the display. Press8 or9, or rotateCH to tune to the frequency you want to hear. The air band receiving range is 108 to 136.9875 MHz.

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You can change the standard transmit frequency ranges to extended ranges. ±

Standard Transmit Frequency Ranges:

2 m: 144–148MHz

70 cm: 438–450MHz

Extended Transmit Frequency Range:

2 m: 142.000–149.880MHz

70 cm: 420.000–470.000MHz

To extend the range, turn off the transceiver. Then while holding down SC+9, pressPWR. To return to the standard range, repeat the above steps.

(%%"+0(14/#6+10

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

%#4'

Keep the transceiver dry; if it gets wet, wipe it dry immediately. Use and store the transceiver only in normal temperature environments. Handle the transceiver carefully; do not drop it. Keep the transceiver away from dust and dirt, and wipe it with a damp cloth occasionally to keep it looking new.

'44"&+52.#;

If you use your transceiver in an area (such as a vehicle) that has many metal surfaces, the transmitted signal can reflect back into the radio and cause the PLL circuit to unlock. If this happens, ;HH appears. This is an inherent problem with this type of transceiver.

To avoid this problem, you can try reducing output power, use an external antenna, or relocate the transceiver when ;HH appears. If;HH appears even when you are using an external antenna located away from the transceiver, service might be required.

10