Radio Shack HTX-242 specification

5.Press ▲. The HTX-242 displays tC and the currently set transmit tone.

6.Rotate TUNE, or press UP or DOWN on the microphone, to set a different transmit tone. If you do not want a transmit tone, select oFF.

7.Press T-SQLor PTT to save the settings.

Activating Subaudible Tone Transmit and Squelch

1.Press T-SQLonce. T appears. The HTX-242 includes the selected transmit tone with your transmissions.

2.Press T-SQLagain. T-SQLappears. The HTX-242 includes the selected transmit tone with your transmissions and requires the selected receive tone to open squelch.

3.Press T-SQLa third time to turn off both subaudible tone transmit and squelch. Neither T nor T-SQLappears on the display.

Setting the DTMF Page and Subaudible Tone Alert

When the alert function is turned on, the HTX-242 sounds a sequence of three tones when it receives a DTMF page (if DTMF page is activated) or a transmission that includes the correct sub- audible tone (if tone squelch is activated).

To turn on the alert function, press F then ALT. ALT appears. To turn off the alert function, press F then ALT again. ALT disappears.

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Image 37

Radio Shack HTX-242 Setting the Dtmf Page and Subaudible Tone Alert, Activating Subaudible Tone Transmit and Squelch

Contents

HTX-242 TWO-METER Mobile Trans Ceiver Introduction Features Using this Manual Contents Using Dtmf and Subaudible Tones Using Memory ChannelsUsing the Menu Troubleshooting Specifications Schematics Connecting 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 Connecting an External Speaker Optional Using the HTX-242 with Packet Radio Understanding the HTX-242 Dtmf Touch-Tone FeaturesDual VFO Modes Repeater Operation Subaudible Tone Ctcss FeaturesMemory Channels VFO-A-T Understanding the DisplayPage Basic Operation Resetting the HTX-242Turning On/Off Your HTX-242 Extending the Transmit Frequency Range Using the Light Setting Volume and SquelchSetting the Power Level Locking the Controls Selecting a Frequency Tuning to a FrequencyDirectly Entering a Frequency Scanning for a Frequency Setting the Frequency Step Setting the Scan Resume Condition Setting the Scan OptionsStoring Scan Skip Frequencies Setting the Scanning Range Setting the Scan Resume Delay Transmitting Receiving Transmissions Transmitting Dtmf Tones from Memory Manually Transmitting Dtmf Tones Limiting Transmit Duration Turning the Keytone Beep On and Off Advanced Operation Frequency Offset DefaultsTurning Auto Duplex On and Off Receive Frequency Transmit Offset Reversing 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 Setting the Subaudible Tones Using Subaudible TonesValid Subaudible Tones Code Freq. Hz Activating Subaudible Tone Transmit and Squelch Setting the Dtmf Page and Subaudible Tone Alert Using the Menu OFF Menu Default Explanation/Available Settings Option Error Codes TroubleshootingCommon Problems and Solutions Problem Possible Solutions Replacing the Fuse General SpecificationsReceiver Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas