Radio Shack HTX-242 owner manual Introduction, Features

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INTRODUCTION

Your HTX-242 Two-Meter Mobile Transceiver is an exciting addi- tion to Radio Shack’s growing line of high-quality amateur radio equipment. It offers some of the most advanced, and most requested, features available in a mobile transceiver. Be sure to read this entire manual to understand how to use all the radio’s features.

You must have a Technician Class or higher Amateur Radio Operator’s License and a call sign issued by the FCC to legally transmit using this ! transceiver. Transmitting without a license carries heavy penalties. Get-

ting a license is easier than ever. Your local Radio Shack store has train- ing materials for all classes of Amateur Radio Operator.

FEATURES

Auto Memory Store (AMS)—automatically searches for active fre- quencies and stores them in memory, including the appropriate repeater offset.

High (45 Watt) and Low (10 Watt) Power Settings—let you select the best power setting for effective communications.

True FM Modulation—provides a clear, natural-sounding signal.

41 Memory Channels—hold one calling frequency and 40 stan- dard frequencies.

Priority Memory Channel 1—lets you set the HTX-242 to period- ically check the frequency stored in Memory Channel 1 and alert you if there is activity on it.

Individually Programmable Repeater Offsets —let you program different repeater offset frequencies for each memory, and a default repeater offset for manually-tuned frequencies.

Subaudible Tone Transmit and Receive (CTCSS) —transmits the subaudible tones required to use some repeaters, and also lets you set a subaudible tone that your transceiver must receive to open squelch.

DTMF Page with Group Calling—lets you set a sequence of up to seven DTMF tones that your transceiver must receive to sound an alert tone and open squelch.

DTMF Transmit and Memory —lets you manually send DTMF tones or send DTMF sequences of up to 15 digits each from one of 10 DTMF memories to quickly access DTMF-access repeaters, autopatches, or other stations equipped with a DTMF page feature.

1996 Tandy Corporation. All Rights Reserved.

Radio Shack is a registered trademark used by Tandy Corporation.

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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 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 Using the HTX-242 with Packet Radio Connecting an External Speaker OptionalDual VFO Modes Dtmf Touch-Tone FeaturesUnderstanding the HTX-242 Memory Channels Subaudible Tone Ctcss FeaturesRepeater Operation 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 ControlsDirectly Entering a Frequency Tuning to a FrequencySelecting a Frequency Setting the Frequency Step Scanning for a FrequencyStoring Scan Skip Frequencies Setting the Scan OptionsSetting the Scan Resume Condition 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 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 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 Receiver SpecificationsGeneral Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas