Radio Shack HTX-242 owner manual Receiving Transmissions, Transmitting

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Receiving Transmissions

To receive a transmission, turn on the HTX-242, adjust the volume and squelch, and tune to the frequency you want to monitor. The HTX-242 displays BUSY, and the signal-strength indicator shows the relative signal strength when it receives a signal.

Note: If BUSY appears but you hear nothing from the speaker, be sure the DTMF page and tone-squelch features are turned off and SQUELCH is set correctly. To turn off DTMF page, press DTMF once. To turn off tone squelch, press T-SQLuntil neither T nor T-SQLappears on the display. See “Activating Subaudible Tone Transmit and Squelch” on Page 37.

Transmitting

!Caution: It is illegal to transmit if you do not have a Technician Class (or higher) license issued by the FCC.

1.Select the desired frequency.

Note: If you select a repeater frequency, the HTX-242 dis- plays + or to show the offset direction. To operate with no offset (simplex) on that frequency, press SHIFT until neither + nor appears.

2.Press LOW so LOW appears on the display. This selects the low power (10 watt) setting.

3.Press the push-to-talk button (PTT) on the side of the micro- phone to transmit. The signal strength meter shows half- scale for low power (or full-scale for high power). Release PTT to listen for a reply.

Notes:

If the other party advises you to improve your signal, press LOW.

!HIGH appears on the display, and the HTX-242 transmits at high power (about 45 watts). To return to low power, press LOW again.

If you try to transmit outside the permitted range, the HTX-242 dis- plays tF Err and beeps twice.

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Contents HTX-242 TWO-METER Mobile Trans Ceiver Features IntroductionUsing this Manual Contents Using the Menu Troubleshooting Using Memory ChannelsUsing Dtmf and Subaudible Tones 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 Turning On/Off Your HTX-242 Resetting the HTX-242Basic Operation Extending the Transmit Frequency RangeSetting the Power Level Setting Volume and SquelchUsing the Light 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 DurationTurning Auto Duplex On and Off Frequency Offset DefaultsAdvanced Operation 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 Valid Subaudible Tones Using Subaudible TonesSetting the 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 OFFCommon Problems and Solutions TroubleshootingError Codes Problem Possible SolutionsReplacing the Fuse General SpecificationsReceiver Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas