Radio Shack HTX-242 Advanced Operation, Using Memory Channels, Using Dtmf and Subaudible Tones

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Advanced Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Frequency Offset Defaults . . . . . . . . . . . . . . . . . . . . . . . . . 25 Turning Auto Duplex On and Off . . . . . . . . . . . . . . . . 25 Changing the Default Offset . . . . . . . . . . . . . . . . . . . . 26 Reversing the Offset . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Overriding the Duplex Offset . . . . . . . . . . . . . . . . . . . . 26

Using the Dual VFOs for Duplex Operation . . . . . . . . . . . . 27

Using Memory Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Storing a Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Changing Stored Settings . . . . . . . . . . . . . . . . . . . . . . . . . 28 Using Auto Memory Store (AMS) . . . . . . . . . . . . . . . . . . . . 29 Tuning to a Standard Memory Channel . . . . . . . . . . . . . . . 30 Using the Calling-Frequency Memory . . . . . . . . . . . . . . . . 30 Checking Priority Channel 1 . . . . . . . . . . . . . . . . . . . . . . . 30 Scanning Memory Channels . . . . . . . . . . . . . . . . . . . . . . . 31 Clearing a Memory Channel . . . . . . . . . . . . . . . . . . . . . . . 31 Enabling/Disabling Scanning for Memory Channels . . . . . 31

Using DTMF and Subaudible Tones . . . . . . . . . . . . . . . . . . 32

Storing a DTMF Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 32

Transmitting a DTMF Sequence . . . . . . . . . . . . . . . . . . . . 32

Using DTMF Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using Group Calling . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using Auto-Reply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Using DTMF Auto Send . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Using Subaudible Tones . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Valid Subaudible Tones . . . . . . . . . . . . . . . . . . . . . . . 36

Setting the Subaudible Tones . . . . . . . . . . . . . . . . . . . 36

Activating Subaudible Tone Transmit and Squelch . . . 37

Setting the DTMF Page and Subaudible Tone Alert . . . . . . 37

Using the Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Common Problems and Solutions . . . . . . . . . . . . . . . . . . . 40

Replacing the Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

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Contents HTX-242 TWO-METER Mobile Trans Ceiver Introduction FeaturesUsing this Manual Contents Using Dtmf and Subaudible Tones Using Memory ChannelsUsing the Menu Troubleshooting Specifications SchematicsUnpacking the Transceiver InstallationConnecting the Microphone Mounting the HTX-242 in a Vehicle Connecting an Antenna Connecting to your Vehicle’s Power Using the HTX-242 as a Base Station Connecting an External Speaker Optional Using the HTX-242 with Packet RadioDual VFO Modes Dtmf Touch-Tone FeaturesUnderstanding the HTX-242 Memory Channels Subaudible Tone Ctcss FeaturesRepeater Operation VFO-A-T Understanding the DisplayPage Basic Operation Resetting the HTX-242Turning On/Off Your HTX-242 Extending the Transmit Frequency RangeUsing the Light Setting Volume and SquelchSetting the Power Level Locking the ControlsDirectly Entering a Frequency Tuning to a FrequencySelecting a Frequency Scanning for a Frequency Setting the Frequency StepStoring Scan Skip Frequencies Setting the Scan OptionsSetting the Scan Resume Condition Setting the Scanning Range Setting the Scan Resume DelayTransmitting Receiving TransmissionsTransmitting Dtmf Tones from Memory Manually Transmitting Dtmf TonesLimiting Transmit Duration Turning the Keytone Beep On and OffAdvanced Operation Frequency Offset DefaultsTurning Auto Duplex On and Off Receive Frequency Transmit OffsetOverriding the Duplex Offset Changing the Default OffsetReversing the Offset Using the Dual VFOs for Duplex Operation Storing a Frequency Using Memory ChannelsChanging Stored Settings Using Auto Memory Store AMS Checking Priority Channel Tuning to a Standard Memory ChannelUsing the Calling-Frequency Memory Enabling/Disabling Scanning for Memory Channels Scanning Memory ChannelsClearing a Memory Channel Transmitting a Dtmf Sequence Using Dtmf and Subaudible TonesStoring a Dtmf Sequence Name Assignment Dtmf Page Sequence Using DtmfUsing Group Calling Using Auto-Reply Using Dtmf Auto Send Setting the Subaudible Tones Using Subaudible TonesValid Subaudible Tones Code Freq. HzActivating Subaudible Tone Transmit and Squelch Setting the Dtmf Page and Subaudible Tone AlertUsing the Menu OFF Menu Default Explanation/Available Settings OptionError Codes TroubleshootingCommon Problems and Solutions Problem Possible SolutionsReplacing the Fuse Receiver SpecificationsGeneral Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas
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