Radio Shack HTX-400 Owner's Manual
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Radio Shack HTX-400 Owner's Manual

Radio Shack HTX-400 Owner's Manual

Mini handheld 70cm fm amateur transceiver
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19-1102.fm Page 1 Friday, March 19, 1999 4:08 PM
Cat. No. 19-1104
OWNER'S MANUAL
Please read before using this equipment.
HTX-400
Mini Handheld 70cm FM
Amateur Transceiver

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  • Page 1 19-1102.fm Page 1 Friday, March 19, 1999 4:08 PM Cat. No. 19-1104 OWNER’S MANUAL Please read before using this equipment. HTX-400 Mini Handheld 70cm FM Amateur Transceiver...
  • Page 2 19-1102.fm Page 2 Friday, March 19, 1999 4:08 PM FEATURES Your RadioShack HTX-400 Mini Handheld 70cm FM Ama- teur Transceiver is compact and lightweight, making it easy to carry almost anywhere. The crystal controlled circuitry provides accurate and stable channel selection, making it an ideal choice for your amateur communications needs.
  • Page 3 19-1102.fm Page 3 Friday, March 19, 1999 4:08 PM Alert Melody — you can set the radio to play a short, selectable melody when it transmits, and play the same melody when it re- ceives a tone encoded signal. Signal Strength Indicator — a graduated bar shows the relative strength of the received signal.

  • Page 4: Fcc Information

    19-1102.fm Page 4 Friday, March 19, 1999 4:08 PM MANUAL CONVENTIONS Your transceiver’s buttons perform multiple functions. The abbre- viation or symbol for a function is printed on, below, or above each button. To activate certain transceiver features, you must press FUNC (function) and another button at the same time.

  • Page 5: Table Of Contents

    19-1102.fm Page 5 Friday, March 19, 1999 4:08 PM CONTENTS Introduction to Amateur Radio ........7 Preparation ..............9 Power Sources ............9 Using Internal Batteries ........9 Testing Internal Batteries ......10 Using Vehicle Battery Power ......11 Connecting the Antenna ........12 Attaching the Belt Clip .........
  • Page 6 19-1102.fm Page 6 Friday, March 19, 1999 4:08 PM Using the Receive Melody Alert ....27 Special Features ............28 Using the Special Features ......... 28 Frequency Step ..........29 Repeater Offset ..........29 Power Save ..........29 Time-Out Timer ..........30 Scan Delay Time ..........

  • Page 7: Introduction To Amateur Radio

    19-1102.fm Page 7 Friday, March 19, 1999 4:08 PM INTRODUCTION TO AMATEUR RADIO Your transceiver is the perfect first radio for anyone entering the exciting world of amateur radio as well as a great additional trans- ceiver for the experienced amateur radio operator. Your trans- ceiver opens a door for you to the world from almost anywhere! All you need is an Amateur Radio Operator’s License (Technician Class or higher) issued by the Federal Communications Commis-...
  • Page 8 Volunteer Examiner Team. Contact the ARRL for a schedule of exam opportunities in your area. The Technician Class license lets you use the HTX-400 to com- municate directly with other operators, and use repeaters for dis- tant communication.

  • Page 9: Preparation

    19-1102.fm Page 9 Friday, March 19, 1999 4:08 PM PREPARATION POWER SOURCES You can operate your transceiver from either of two power sources: • internal batteries • vehicle battery power (using an optional DC adapter) Using Internal Batteries Your transceiver can use two AA batteries (not supplied) for pow- er.

  • Page 10: Testing Internal Batteries

    19-1102.fm Page 10 Friday, March 19, 1999 4:08 PM 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.

  • Page 11: Using Vehicle Battery Power

    19-1102.fm Page 11 Friday, March 19, 1999 4:08 PM Using Vehicle Battery Power You can operate the HTX-400 from your vehicle’s battery using a DC adapter such as RadioShack Cat. No. 273-1815. Cautions: You must use a power source that supplies 9 volts DC and delivers at least 800 mA.

  • Page 12: Connecting The Antenna

    19-1102.fm Page 12 Friday, March 19, 1999 4:08 PM CONNECTING THE ANTENNA 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. Caution: Do not overtighten the antenna...

  • Page 13: Attaching The Belt Clip

    19-1102.fm Page 13 Friday, March 19, 1999 4:08 PM ATTACHING THE BELT CLIP Use a Phillips screwdriver and the two supplied screws to attach the supplied belt clip to your transceiver. Do not overtighten the screws. ATTACHING THE WRIST STRAP 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.

  • Page 14: Connecting A Microphone/Speaker

    19-1102.fm Page 14 Friday, March 19, 1999 4:08 PM CONNECTING A MICROPHONE/ SPEAKER You can connect an external communications headset, con- sisting of a microphone and speaker, to the transceiver so you can use it privately. Lift the hinged, rubber dust cover from the MIC and SPK jacks on the top of the transceiver, then insert the plug of an optional voice activated headset with micro- phone, such as Cat.No.

  • Page 15: A Quick Look At The Controls

    19-1102.fm Page 15 Friday, March 19, 1999 4:08 PM A QUICK LOOK AT THE CONTROLS VOL/OFF PTT (Push-to-Talk) button Speaker Microphone VOL/OFF – turns the radio on/off; adjusts the volume SQ — sets the squelch level to block weak signals —...
  • Page 16 19-1102.fm Page 16 Friday, March 19, 1999 4:08 PM PTT (Push-to-Talk) — press to transmit and to store settings in memory FUNC+ — accesses the subaudible tone squelch frequencies FUNC+REV — reverses the offset frequency FUNC+PTT — reverses the send and receive frequencies FUNC+LOCK —...

  • Page 17: Operation

    19-1102.fm Page 17 Friday, March 19, 1999 4:08 PM OPERATION 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 on the same frequency, is called simplex operation.
  • Page 18 19-1102.fm Page 18 Friday, March 19, 1999 4:08 PM Notes: • If the transceiver picks up unwanted weak transmissions, rotate slightly clockwise to decrease the transceiver’s sensitivity to signals. The weak transmissions are blocked. • Your transceiver normally tunes the range of 430.000– 458.000 MHz.

  • Page 19: Scanning For Active Frequencies

    19-1102.fm Page 19 Friday, March 19, 1999 4:08 PM 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 stops on active frequencies for 5 seconds. 2.

  • Page 20: Locking The Keypad

    19-1102.fm Page 20 Friday, March 19, 1999 4:08 PM LOCKING THE KEYPAD To lock the transceiver’s keypad so you do not accidentally change a setting, press appears. This locks all FUNC LOCK buttons except push-to-talk, , and . Press FUNC LOCK again to unlock the keypad.

  • Page 21: Using Standard Memories

    19-1102.fm Page 21 Friday, March 19, 1999 4:08 PM 2. To change the frequency, hold down until flash. 3. Directly enter or press to select the desired fre- quency. If you want to enter a repeater frequency see “Understanding Repeaters” on Page 17. 4.

  • Page 22: Storing A Repeater Offset Frequency

    19-1102.fm Page 22 Friday, March 19, 1999 4:08 PM 4. To select a different frequency than that displayed, repeat- edly press or use direct frequency entry. 5. To store the setting, press and the memory location stop flashing and your entry is stored. 6.

  • Page 23: Scanning Standard Memory Locations

    19-1102.fm Page 23 Friday, March 19, 1999 4:08 PM 5. If you want to set scanning to skip the memory location, press , then press SCSP ON (scan skip) appears. To include the displayed location in a scan press appears. SCSP oF 6.

  • Page 24: Using Subaudible Tone Squelch

    19-1102.fm Page 24 Friday, March 19, 1999 4:08 PM USING SUBAUDIBLE TONE SQUELCH Your HTX-400 can transmit and receive a low-level, selectable subaudible tone at the same time as it transmits (TX) or receives (RX) a regular signal. This special tone lets you listen only to oth- er units set to the same tone frequency when you use the radio in a line-of-sight transmit and receive situation.

  • Page 25: Subaudible Tone Frequencies

    19-1102.fm Page 25 Friday, March 19, 1999 4:08 PM Subaudible Tone Frequencies (MHz) 67.0 114.8 186.2 69.3 118.8 189.9 71.9 123.0 192.8 74.4 127.3 196.6 77.0 131.8 199.5 79.7 136.5 203.5 82.5 141.3 206.5 85.4 146.2 210.7 88.5 151.4 218.1 91.5 156.7 225.7...

  • Page 26: Reversing The Offset

    19-1102.fm Page 26 Friday, March 19, 1999 4:08 PM REVERSING THE OFFSET When you turn on the repeater offset, the HTX-400 uses the last offset direction you set. To change the offset direction, press appears in the display for a positive offset (the FUNC transmit frequency is above the receive frequency) and –...

  • Page 27: Using The Transmit Melody Alert

    19-1102.fm Page 27 Friday, March 19, 1999 4:08 PM Using the Transmit Melody Alert Follow these steps to select a transmit melody. 1. Turn on the radio. Make sure you are not in memory mode. 2. Hold down and press four times and a FUNC...

  • Page 28: Special Features

    19-1102.fm Page 28 Friday, March 19, 1999 4:08 PM SPECIAL FEATURES USING THE SPECIAL FEATURES The transceiver has several advanced features that give you ad- ditional control and convenience while using your transceiver. To set any of the features follow these steps. For detailed infor- mation on any feature, see its section on the following pages 1.

  • Page 29: Frequency Step

    19-1102.fm Page 29 Friday, March 19, 1999 4:08 PM 3. Press to change the selected feature’s settings. 4. To change to another feature setting, repeatedly press + until you see that setting. Then repeat FUNC FUNC Step 3. 5. To store all customized settings and return to the normal display, press Frequency Step To change the scanning frequency increment, with CS and a fre-...

  • Page 30: Time-Out Timer

    19-1102.fm Page 30 Friday, March 19, 1999 4:08 PM Time-Out Timer When you communicate using repeaters, you should 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 and sound a beep if you exceed a set time limit with a single transmission.

  • Page 31: Busy Channel Lockout

    19-1102.fm Page 31 Friday, March 19, 1999 4:08 PM Busy Channel Lockout This feature sets the transceiver so you cannot transmit while it is receiving a signal. With the radio’s preset value bCLO dis- played, press to change the display to bCLO oN and turn the feature on.

  • Page 32: Troubleshooting

    19-1102.fm Page 32 Friday, March 19, 1999 4:08 PM TROUBLESHOOTING If your transceiver is not working as it should and it displays an error message, these suggestions might help you eliminate the problem. If the transceiver still does not operate properly, take it to your local RadioShack store for assistance.

  • Page 33: Care And Maintenance

    19-1102.fm Page 33 Friday, March 19, 1999 4:08 PM CARE AND MAINTENANCE Your RadioShack HTX-400 Mini Handheld 70cm FM Amateur Transceiver is an example of superior design and craftsmanship. The following suggestions will help you care for your transceiver so you can enjoy it for years.

  • Page 34: Resetting The Transceiver

    19-1102.fm Page 34 Friday, March 19, 1999 4:08 PM RESETTING THE TRANSCEIVER If the transceiver’s display locks up or does not work properly af- ter you connect power, you might need to reset the transceiver. Caution: This procedure clears all the information you have pro- grammed into the transceiver.

  • Page 35: Specifications

    19-1102.fm Page 35 Friday, March 19, 1999 4:08 PM SPECIFICATIONS GENERAL Frequency: RX .............. 420–470 MHz TX ............... 430–450 MHz Frequency Generation ......PLL Synthesizer Frequency Stability ..........± 5 ppm Operating Temperature ..14° to 131° F (–10° to 55° C) Power Source ..........
  • Page 36 19-1102.fm Page 36 Friday, March 19, 1999 4:08 PM Limited One-Year Warranty This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for one (1) year from the date of purchase from RadioShack company-owned stores and authorized Ra- dioShack franchisees and dealers.

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