HTX-420-(Owners-Manual操作说明书手册)

HTX-420 2-Meter/70cm Dual Band FM Amateur Transceiver19-1108OWNER'S MANUAL-Please read before using this equipment.CONTENTSThank you for purchasing a RadioShack HTX-420 2-Meter/70 cm Dual Band FM AmateurPreparation..Transceiver.Your transceiver is compact and rugged,making it easy to carry almost anywhere.Using Intemal BatteriesUsing AC or DC PowerThe crystal controlled circuitry provides accurate and stable frequency selection,making it anConnecting the Antennaideal choice for your amateur communications needsAttaching the Belt ClipAttaching the Wrist StrapElectronic Compass-provides two letters toConnecting a Microphone/Speakerindicate direction(such as SW or NW)and up toA Quick Look At the Display ...........three digits to show directional angle (such asOperation..4Manual Conventions360°，180°，90°or45).See"Using theTuming On/Off the TransceiverElectronic Compass"on page 9.Setting the Squelch LevelTemporarily Opening SquelchUsing the Universal Type KeysSelecting Frequencies (Direct Tuning)and ReceivingFull 16-Key DTMF (Dual-Tone MultiTransmissions.....Frequency)Keypad-lets you dial andTransmittingmake telephone connections.SeeHTX-420Understanding Repeaters5Setting the Repeater Offset Frequency"Transmitting a DTMF Code"on page 7.Tuming Repeater Operation On/Off and ChangingThe Offset Direction.」Memory OperationProgrammable Frequency Steps-letStoring a Transmit/Receive Frequency.you set the frequency increment forRecalling Memory Locationstuning or scanning to steps of 5,6.25,7.5Checking Memory Location Settings.6Clearing a Single Memory10,12.5,15,20,25,or50kHz.SeeUsing the Calling-Frequency Memory ...................6"Setting the Frequency Step"on page 8.骂尚Scanning Operation...Scanning for Active Frequencies........MRScanning Standard Memory LocationsSAME Weather Alert-uses SpecificSkipping Memory Channels While Scanning.受Area Message Encoding (SAME)digitalContinuous Tone Coded Squelch System Features8K098(CTCSS)information to determine and display the0Setting the CTCSS Tones..level of weather events.See"Using theUsing the CTCSS TonesSAME Alert"on page 8.Using DTMF CodeTransmitting a DTMF CodeUsing the Transceiver with Packet RadioLocking the KeypadLighting the Displayand want nothing to do with "bootleggers"-Tuming the Key Tone On and OffINTRODUCTION TOSetting the Frequency StepAMATEUR RADIOtheir term for people who operate without aPower Savelicense.Using Auto Power ShutoffLimiting Transmit Duration (Time-Out Timer)Amateur radio is a great hobby that hasTuning the Weather Radio Frequencies ..............enriched the lives of millions of people allIf you do not hear anyone talking about aUsing the SAME Alertover the world.Your transceiver is the perfectlocal club as you listen to local transmissions.Using the Electronic CompassSelecting the Transmit Power10first radio for anyone entering the excitingwrite to the American Radio Relay LeagueCross Band Channel Operation10world of amateur radio,or as a great(ARRL)at the following address to find ou