Page 2 - FEATURES
2 FEATURES Your RadioShack HTX-400 Mini Handheld 70-Centimater FMAmateur Transceiver is compact and lightweight, making it easyto carry almost anywhere. The crystal controlled circuitry pro-vides accurate and stable frequency selection, making it an idealchoice for your amateur communications needs....
Page 4 - MANUAL CONVENTIONS; BUSY; FCC INFORMATION
4 MANUAL CONVENTIONS Your transceiver’s buttons perform multiple functions. The abbre-viation or symbol for a function is printed on, below, or aboveeach button. To activate certain transceiver features, you must press FUNC(function) and another button at the same time. Those key com-bination instru...
Page 5 - CONTENTS
5 CONTENTS Introduction to Amateur Radio ............................................. 7 Preparation ............................................................................. 9 Power Sources .................................................................. 9 Using Internal Batteries ..............
Page 7 - INTRODUCTION TO AMATEUR RADIO
7 INTRODUCTION TO AMATEUR RADIO Your transceiver is the perfect first radio for anyone entering theexciting world of amateur radio, as well as a great additionaltransceiver for the experienced amateur radio operator. Yourtransceiver opens a door for you to the world from almost any-where! All you ne...
Page 9 - PREPARATION; POWER SOURCES; Using Internal Batteries
9 PREPARATION POWER SOURCES You can operate your transceiver from any of three power sourc-es: • internal batteries • AC power (using an optional power supply and DC adapter) • vehicle battery power (using an optional DC adapter) Using Internal Batteries Your transceiver can use two AA batteries (no...
Page 10 - Testing Internal Batteries; BAT
10 2. Press down and slide the battery compartment cover in the direction of the arrow marked on the cover. 3. Put the batteries into the compartment and on top of the attached ribbon, according to the polarity symbols (+ and –)marked inside the compartment. 4. Replace the cover and slide the LOCK t...
Page 11 - USING AC POWER
11 USING AC POWER You can operate the HTX-400 from AC power using a regulatedpower supply capable of supplying 13.8 VDC at least 1A and avehicle power adapter (see “Using Vehicle Battery Power” onPage 12). The supply should also have an accessory powersocket into which the DC-to-DC power adapter fit...
Page 12 - USING VEHICLE BATTERY POWER
12 USING VEHICLE BATTERY POWER You can power the HTX-400 from a vehicle’s 12V power source(such as cigarette-lighter socket) using an 9-volt, 900 mA DC-to-DC power adapter and a size I Adaptaplug ® (neither supplied) with TIP set to +. Both are available at your local RadioShackstore. Cautions: You ...
Page 13 - CONNECTING THE ANTENNA; Caution: Do not over-tighten the antenna; ATTACHING THE BELT CLIP
13 CONNECTING THE ANTENNA Place the threaded base socket of the supplied antenna over theantenna connector on top of the transceiver and turn the antennaclockwise to tighten it. Turn it clockwise to remove it. Caution: Do not over-tighten the antenna Note: You can connect an external antenna to the ...
Page 14 - ATTACHING THE WRIST STRAP
14 ATTACHING THE WRIST STRAP To attach the supplied wrist strap to the top of the belt clip, threadthe strap’s small loop through the opening in the top of the clip.Then insert the longer loop through the smaller loop and pull onthe strap until the loop is tight. CONNECTING A MICROPHONE/SPEAKER You ...
Page 16 - USING THE MENUS; USING THE HTX-400’S MENUS
16 USING THE MENUS USING THE HTX-400’S MENUS The HTX-400 provides two menus to access its features, theMain Menu and the Tone Set Menu. To see details about eachoperation, refer to the page number in the following chart. To access the Main Menu, hold down FUNC while turning on the HTX-400. (The CS o...
Page 19 - A QUICK LOOK AT THE CONTROLS
19 A QUICK LOOK AT THE CONTROLS Most of the controls of the HTX-400 have multiple functions. Usethe following chart to review the function of each control. Key/Control Use it to: Use with the FUNC + Key to: VOL/OFF Turn the radio on/off. Adjust the volume. Access the Main Menu. SQ Set the squelch le...
Page 22 - A QUICK LOOK AT THE DISPLAY
22 A QUICK LOOK AT THE DISPLAY 1. F: appears when the FUNC key is pressed. 2. TX: appears when the radio is transmitting. 3. BUSY: appears when the radio receives a signal. 4. CALL: appears when tone squelch is on and the radio receives a matching tone. 5. : indicates the battery strength. 6. S-RF (...
Page 23 - OPERATION; TURNING ON THE HTX-400; HELLO
23 OPERATION TURNING ON THE HTX-400 To turn on the HTX-400, rotate VOL/OFF clockwise until it clicks. The HTX-400 sounds a brief melody if the key tone feature is en-abled. Then HELLO appears for about 2 seconds and the last used frequency appears. SELECTING FREQUENCIES(DIRECT TUNING) You tune to th...
Page 24 - RECEIVING TRANSMISSIONS; TEMPORARILY OPENING SQUELCH
24 RECEIVING TRANSMISSIONS Follow these steps to receive standard transmissions. 1. With the radio on, rotate SQ counterclockwise until you hear a hissing sound. Then slowly rotate SQ clockwise just until the noise stops. Notes: • BUSY appears when the HTX-400 receives a standard transmission or if ...
Page 25 - TRANSMITTING; TX; inhibit
25 TRANSMITTING There are two basic types of communication possible with thistransceiver: radio-direct-to-radio (simplex) or radio-to repeater-toradio (duplex). Simplex operation uses the same frequency tosend and receive. Duplex operation uses one frequency to trans-mit and another to receive. For ...
Page 26 - UNDERSTANDING REPEATERS
26 UNDERSTANDING REPEATERS Operation through a repeater, where you transmit on one fre-quency and receive on another, is called duplex operation. Oper-ation direct to another station, where you transmit and receive onthe same frequency, is called simplex operation. A repeater is a station that recei...
Page 28 - Note: To save this setting in a memory location,
28 SETTING THE REPEATER OFFSET DIRECTION 1. Set an offset frequency other than 0.00. 2. Press FUNC + SC (RPT) to see the current offset direction ( + above or – below). 3. Press FUNC + MO ( REV ) to change the repeater offset direc- tion. Note: To save this setting in a memory location, must be flas...
Page 29 - MEMORY OPERATION
29 MEMORY OPERATION Your HTX-400 has 30 standard memory locations that you canuse to store frequencies for quick access. For each memory loca-tion, you can also store other settings such as the repeater offset,CTCSS tones, and frequencies to pass or lock out during scan-ning. STORING A TRANSMIT/RECE...
Page 32 - SCANNING OPERATION; SCANNING FOR ACTIVE FREQUENCIES; Using Scan Delay; Sd
32 SCANNING OPERATION SCANNING FOR ACTIVE FREQUENCIES 1. To search for activity on a frequency, press SC . The trans- ceiver begins to scan up or down the full frequency range,and it stops on each active frequency for the duration set bythe scan delay option (see “Using Scan Delay” on Page 32). 2. T...
Page 33 - SCSP
33 Setting A Memory Location to Always SkipDuring Scanning The HTX-400 is preset to include all memory locations (exceptempty locations) during memory scanning . Follow these stepsto set the transceiver to have it always skip (or resume scan-ning) a specific location during scanning. 1. Press MR . a...
Page 34 - PASS; EMPTY
34 Temporarily Locking Out (Skipping) Locations During Memory Scanning You can set the transceiver to lock out a location while scanningthe frequencies stored in memory. When the transceiver stops at a memory location you want toskip, press FUNC . PASS briefly appears and the transceiver con- tinues...
Page 37 - TONE PAGING; MEL; SENDING PAGING TONES
37 TONE PAGING You can set the HTX-400 to sound an alert tone when it receivesa transmission that includes the currently set subaudible receive-tone (or any transmission, if the receive-tone or the tone featureis set to off). Turn off the radio, then press while you turn the HTX-400 on again. appear...
Page 38 - OTHER SPECIAL FEATURES; LOCKING THE KEYPAD
38 OTHER SPECIAL FEATURES CHANGING THE TRANSMIT FREQUENCY RANGE You can change the standard transmit frequency range from430–450 MHz to an extended range of 420–450 MHz. To set the transceiver to its extended range, turn off the transceiv-er, then hold down SC and turn on the transceiver again. To r...
Page 40 - POWER SAVE
40 POWER SAVE The power save feature lets the radio conserve battery power byturning off power to the receiver section and periodically turningit on to check for a transmission. Use the Main Menu to set thepower save option (see “Using the HTX-400’s Menus” on Page16). With PS and the current status ...
Page 41 - REDUCING SQUELCH TAIL; BUSY CHANNEL LOCKOUT
41 REDUCING SQUELCH TAIL If you are communicating with a repeater or another station usingsubaudible tones, you can eliminate the squelch tail (the burst ofnoise the other person hears when you stop transmitting) by turn-ing on the transmit delay option. When you turn on this featureand use CTCSS, t...
Page 42 - TROUBLESHOOTING; You see
42 TROUBLESHOOTING If your transceiver is not working as it should and it displays anerror message, these suggestions might help you eliminate theproblem. If the transceiver still does not operate properly, take itto your local RadioShack store for assistance. You see Possible Cause Remedies S-SHORT...
Page 43 - CARE AND MAINTENANCE
43 CARE AND MAINTENANCE Your RadioShack HTX-400 Mini Handheld 70-Centimeter FMAmateur Transceiver is an example of superior design andcraftsmanship. The following suggestions will help you care foryour transceiver so you can enjoy it for years. Keep the transceiver dry. If it gets wet, wipe it dryim...
Page 44 - USING THE KEYPAD DIAGNOSTIC; RESETTING THE HTX-400
44 USING THE KEYPAD DIAGNOSTIC The HTX-400 has a built-in diagnostic program that lets you con-firm whether the keypad switches are functioning correctly. Touse this diagnostic program, follow these steps. 1. Hold down MO ( REV ) and turn on the transceiver. 2. Press MO ( REV ) again. PrESS dn appea...
Page 45 - SPECIFICATIONS; GENERAL; RECEIVER
45 SPECIFICATIONS GENERAL Frequency: RX .............................................................. 420–470 MHzTX ............................................................... 430–450 MHzExtended TX Range .................................... 420–450 MHz Frequency Generation .......................
Page 46 - NOTES
46 NOTES 19-1104rc.fm Page 46 Friday, August 27, 1999 8:31 AM
Page 48 - Limited One-Year Warranty
08A99 Printed in Korea Limited One-Year Warranty This product is warranted by RadioShack against manufacturing defects inmaterial and workmanship under normal use for one (1) year from the date ofpurchase from RadioShack company-owned stores and authorized Ra-dioShack franchisees and dealers. EXCEPT...
