Radio Shack HTX-242 Manual: Your Guide to 's HTX 242 Operations and Features

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BASIC OPERATION

Turning On/Off Your HTX-242

To turn your HTX-242 on or off, press POWER. When you turn it on, all display elements briefly turn on and the HTX-242 sounds five tones. Then it returns to the last-used settings.

Resetting the HTX-242

When you first use your HTX-242, if it displays PLL Err or EEP Err, or if you ever want to reset the HTX-242 to the factory defaults and clear all memory, follow these steps.

!Important: This procedure clears all stored information.

1.Turn off the HTX-242.

2.While holding down F+T-SQL, turn on the HTX-242. All display elements stay on for about 1 second.

See “Extending the Transmit Frequency Range” (below) and “Using the Menu” on Page 38.

Extending the Transmit Frequency Range

The following are the HTX-242’s default frequency ranges:

Transmit: 144.000 – 148.000 MHz

Receive: 136.000 – 174.000 MHz

!Important: Do not expand the transmit frequency coverage unless you are licensed to operate on MARS or CAP frequencies.

To expand the transmit frequency coverage, hold down F+DTMF while you turn on the HTX-242. The new frequency ranges are:

Transmit: 142.500 – 149.500 MHz

Receive: 136.000 – 174.000 MHz

!Note: To return to the default frequency ranges, you must reset the trans- ceiver. See “Resetting the HTX-242”.

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Contents HTX-242 TWO-METER Mobile Trans Ceiver Features IntroductionUsing this Manual Contents Using Memory Channels Using Dtmf and Subaudible TonesUsing the Menu Troubleshooting Specifications SchematicsConnecting the Microphone InstallationUnpacking the Transceiver Mounting the HTX-242 in a Vehicle Connecting an Antenna Connecting to your Vehicle’s Power Using the HTX-242 as a Base Station Using the HTX-242 with Packet Radio Connecting an External Speaker OptionalUnderstanding the HTX-242 Dtmf Touch-Tone FeaturesDual VFO Modes Repeater Operation Subaudible Tone Ctcss FeaturesMemory Channels Understanding the Display VFO-A-TPage Resetting the HTX-242 Basic OperationTurning On/Off Your HTX-242 Extending the Transmit Frequency RangeSetting Volume and Squelch Using the LightSetting the Power Level Locking the ControlsSelecting a Frequency Tuning to a FrequencyDirectly Entering a Frequency Setting the Frequency Step Scanning for a FrequencySetting the Scan Resume Condition Setting the Scan OptionsStoring Scan Skip Frequencies Setting the Scan Resume Delay Setting the Scanning RangeReceiving Transmissions TransmittingManually Transmitting Dtmf Tones Transmitting Dtmf Tones from MemoryTurning the Keytone Beep On and Off Limiting Transmit DurationFrequency Offset Defaults Advanced OperationTurning Auto Duplex On and Off Receive Frequency Transmit OffsetReversing the Offset Changing the Default OffsetOverriding the Duplex Offset Using the Dual VFOs for Duplex Operation Changing Stored Settings Using Memory ChannelsStoring a Frequency Using Auto Memory Store AMS Using the Calling-Frequency Memory Tuning to a Standard Memory ChannelChecking Priority Channel Clearing a Memory Channel Scanning Memory ChannelsEnabling/Disabling Scanning for Memory Channels Storing a Dtmf Sequence Using Dtmf and Subaudible TonesTransmitting a Dtmf Sequence Using Group Calling Using DtmfName Assignment Dtmf Page Sequence Using Auto-Reply Using Dtmf Auto Send Using Subaudible Tones Setting the Subaudible TonesValid Subaudible Tones Code Freq. HzSetting the Dtmf Page and Subaudible Tone Alert Activating Subaudible Tone Transmit and SquelchUsing the Menu Menu Default Explanation/Available Settings Option OFFTroubleshooting Error CodesCommon Problems and Solutions Problem Possible SolutionsReplacing the Fuse General SpecificationsReceiver Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas