Table of Contents
Related Manuals for Radio Shack HTX-420
Summary of Contents for Radio Shack HTX-420
- Page 1 RADIOSHACK CORPORATION BG TECH. FCC ID: AAO1901108 JOB #: 388K1 EXHIBIT #: 4 Cat. No. 19-1108 OWNER’S MANUAL Please read before using this equipment. HTX-420 Compact Handheld 2m/70cm FM Amateur Transceiver ® RadioShack® VERSION III 2001/2/28...
- Page 2 BG TECH. FEATURES Your RadioShack Compact Handheld 2m/70cm FM Amateur Transceiver is compact and rugged, making it easy to carry almost anywhere. The crystal controlled circuitry provides accurate and stable frequency selection, making it an ideal choice for your amateur communications needs. Note : You must have a Technician Class or higher Amateur Radio Operator’s License, and a call sign issued by the FCC, to legally transmit using this transceiver.
- Page 3 BG TECH. Power Save – conserves battery power when the transceiver is not transmitting or receiving. Programmable Frequency Steps – let you set the frequency increment for tuning or scanning to steps of 5, 6.25, 7.5, 10, 12.5, 15, 20, 25, 25, 50kHz. Signal Strength Indicator –...
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Page 4: Manual Conventions
BG TECH. MANUAL CONVENTIONS Your transceiver’s buttons perform multiple functions. The abbreviation or symbol for a function is printed on or above 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 the first button name, +, then the second button name. - Page 5 BG TECH. CONTENTS Introduction to Amateur Radio Preparation Using Internal Batteries Using Rechargeable Battery Pack Testing Internal Batteries Using Non-Rechargeable Batteries Using AC Power Using Vehicle Battery Power Connecting the Antenna Attaching the Belt Clip Attaching the Wrist Strap Connecting a Microphone/Speaker A Quick Look at the Display Operation Turning On/Off the Transceiver...
- Page 6 BG TECH. Scanning Operation Scanning for Active Frequencies Continues Tone Coded Squelch System Features Using the CTCSS tones Using DTMF Code Transmitting a DTMF code from Memory Transmitting a DTMF Code Using Direct Entry Other Special Features Locking the Keypad Lighting the Display Turning the Display and Keypad Turning the Key Tone On and Off...
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Page 7: Introduction To Amateur Radio
BG TECH. INTRODUCTION TO AMATEUR RADIO Your transceiver is the perfect first radio for anyone entering the exciting world of amateur radio, s well as a great additional transceiver for the experienced amateur radio operator. Your transceiver 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 Commission (FCC). - Page 8 BG TECH. learn Morse code for a Technician Class license, we encourage you to learn it anyway so you can advance to higher levels of operating privileges. There is no fee to take the Novice exam. As soon as you pass the Novice exam, you can immediately take the Technician exam.
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Page 9: Using Internal Batteries
BG TECH. PREPARATION You can operate your transceiver from any of four power sources; Li-Ion batteries Alkaline batteries AC Power (using an optional AC adapter) Vehicle battery power (using an optional DC adapter) USING INTERNAL BATTERIES Using Rechargeable Batteries You can power your transceiver using two lithium ion batteries supplied as a sealed pack. The battery pack has a built-in circuit that lets you recharge Li-Ion batteries. - Page 10 BG TECH. You can power the transceiver from a vehicle’s 13.8V power source or cigarette lighter socket using 13.8 V DC to DC power adapter and a size H Adaptaplug (neither supplied). Both are available at your local RadioShack store. CONNECTING THE ANTENNA Place the threaded base socket of the supplied antenna over the antenna connector on the top of the transceiver and turn the antenna clockwise to tighten it.
- Page 11 BG TECH. Note : Connecting a headset’s plug to the transceiver’s SPK jack automatically disconnects the internal speaker. You can also connect an optional mono earphone to the SPK jack. This lets you use the transceiver’s push-to talk button to transmit as usual. Your local RadioShack store carries a wide selection of suitable communication headsets, earphones, and separate components.
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Page 12: A Quick Look At The Display
BG TECH. A QUICK LOOK AT THE DISPLAY : : it will appear when F (function) key is pressed. 2. TSQ This is for the function of tone squelch (CTCSS). “T” will appear when Tone Squelch (CTCSS) is enabled for transmitting. “SQ”... - Page 13 BG TECH. A : This icon shows when RX mode is in Air band. battery icon : Battery icon indicates the battery strength. B (key symbol) : this indicates that the key pad control is disabled to prevent accidental setting changes. 10.
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Page 14: Operation
BG TECH. OPERATION TURING ON /OFF THE TRANSCEIVER To turn the transceiver, hold down “PWR” key for about 0.5 second. The radio beeps once if the key tone feature is enabled. Then the current battery voltage briefly appears and the last used frequency appears. - Page 15 BG TECH. USING UNIVERSAL TYPE KEY FOR SET MODE Press repeatedly to select setting SQL 0 ~ 5, VHFRPT, UHFRPT, RXTONE, TXTONE, DTMF, AREA code set, SAME on/off mode in turns. If you select a setting you want to change, press to change value.
- Page 16 BG TECH. TXTONE : TX CTCSS Frequency Setting When you select a frequency or no frequency (CTCSS off) pressing up/down arrow Key or rotate a rotary switch, press to save and exit Default is “88.5”. dTMF : DTMF dial Setting à...
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Page 17: Repeater Operation
BG TECH. 6. Do the same way of 4. and 5. 7. After entering AREA code, press or PTT key to go to VFO mode. à Data re -entry 1. Select the address to modify. 2. Enter the desired code. Once area code is entered, WX SAME mode works only area code is matched. -
Page 18: Memory Operation
BG TECH. MEMORY OPERATION 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, weather, and UHF bands. When you store a frequency, all other settings associated with that frequency (such as the repeater offset and CTCSS tones) are stored as well. -
Page 19: Using The Calling-Frequency Memory
BG TECH. Memory No. 1 will not be cleared. USING THE CALLING-FREQUENCY MEMORY Press “Call” key to display the current calling frequency. The frequency appears. To change the store frequency, press F + Call (CM) after enter a new frequency in VFO. To enable the calling frequency, press “CALL”... -
Page 20: Scanning Operation
BG TECH. SCANNING OPERATION SCANNING FOR ACTIVE FREQUENCY Press “SC” key to scan up or down the band’s full frequency range. The decimal point flashes as the transceiver scans. The radio stops on each active frequency for 8 seconds. To change the scanning direction, press up or down arrow key or rotate the rotary switch. - Page 21 BG TECH. CONTINUOUS TONE CODED SQUELCH SYSTEM FEATURES Your transceiver 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 other radio set to the same tone frequency when you use the transceiver in simplex operation.
- Page 22 BG TECH. USING DTMF CODE DTMF (Dual-Tone Multi-Frequency) tones are those typically associated with the use of your telephone. Your transceiver can tranmit up to 16 separate DTMF tones and store a sequence of tones in up to 6 different memory location (d1 to d6).
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Page 23: Other Special Features
BG TECH. OTHER SPECIAL FEATURES LOCKING THE KEYPAD Press “F” + “Lock (DW)” key. To unlock the keypad, press “F” + “Lock”. PWR won’t be locked. LIGHTING THE DISPLAY When you press any key except “PTT” or “F” , the backlight turns on for about 5 seconds. TURING THE KEY TONE ON AND OFF Press “F”... - Page 24 BG TECH. Press “F” + “TOT(4)”. The default setting OFF appears with TOT on LCD. Repeatedly press key or channel rotary switch to select the desired time -out-timer interval from 1, 2, 3, 4, 5, 10, 15, 20 min. When you select a value for the time -out-timer feature, “TOT” appears on the LCD.
- Page 25 BG TECH. 090, 045, 005, appear by 5 degree step in the right on the display. For calibration of compass, press “PWR” + “COMP” key and then confirm the display “CAL”. Then, turn the unit twice clockwise or counterclockwise. And then press “PTT” or to return to normal mode.
- Page 26 BG TECH. don’t receive in signal, it goes to scan in sub. If pressing PTT, it transmits in last memory channel before entering the dual watch mode and dual watch is canceled. If “M” key is held down, it scans in sub frequency till "M" is released. If released “M” key, it waits 200 msec in main channel and back to the sub frequency.
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Page 27: Specification
BG TECH. SPECIFICATION GENERAL Frequency 2-Meter ----------------------------------- TX:144 ~148MHz/RX: 137 ~ 174MHz 70-cm ----------------------------------- TX:438 ~450MHz/RX: 420 ~ 512MHz Weather Channel ------------------------------------ RX : CH1 ~ CH7 Airband ----------------------------------- RX : 108.000 ~ 136.9875MHz Frequency Generation --------------------------------- PLL Synthesizer Frequency Stability ---------------------------------- +/- 10 ppm Operating Temp. - Page 28 BG TECH. Deviation ---------------------------------- +/- 5kHz MAX. S/N Ratio ---------------------------------- 40dB Current Drain ---------------------------------- 1200mA, DC 7.2V 1500mA, DC 12V VERSION III 2001/2/28...
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