Radio Shack Mastering Subaudible Tones with HTX-242 Radio for Enhanced Communication

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Using Subaudible Tones

Some repeaters require you to transmit a subaudible tone to acti- vate them. You can set your HTX-242 to transmit any of the 38 standard subaudible tones. You can also limit incoming reception by setting the HTX-242 to open the squelch only when someone transmits a subaudible tone you select.

Valid Subaudible Tones

Code	Freq. (Hz)	Code	Freq. (Hz)	Code	Freq. (Hz)
XZ	67.0	1B	107.2	6Z	167.9

XA	71.9	2E	110.9	6A	173.8

WA	74.4	2A	114.8	6B	179.9

XB	77.0	2B	118.8	7Z	186.2

WB	79.7	3Z	123.0	7A	192.8

YZ	82.5	3A	127.3	M1	203.5

YA	85.4	3B	131.8	M2	210.7

YB	88.5	4Z	136.5	M3	218.1

ZZ	91.5	4A	141.3	M4	225.7

ZA	94.8	4B	146.2	M5	233.6

ZB	97.4	5Z	151.4	M6	241.8

1Z	100.0	5A	156.7	M7	250.3

1A	103.5	5B	162.2

Setting the Subaudible Tones

Some repeaters require you to transmit a subaudible tone with your transmission. You can also set a tone that must accompany transmissions for your HTX-242 to open squelch.

Follow these steps to set the subaudible tones for the VFO mode. After you set the tones, you must activate the function to turn it on. Changing this setting does not change the tones stored in any memory channel.

1.Press VFO.

2.Hold F for at least 1 second. FUNC flashes.

3.Press T-SQL. The HTX-242 displays rC and the currently set receive tone.

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

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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 SchematicsInstallation Connecting the MicrophoneUnpacking 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 OptionalDtmf Touch-Tone Features Understanding the HTX-242Dual VFO Modes Subaudible Tone Ctcss Features Repeater OperationMemory 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 ControlsTuning to a Frequency Selecting a FrequencyDirectly Entering a Frequency Setting the Frequency Step Scanning for a FrequencySetting the Scan Options Setting the Scan Resume ConditionStoring 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 OffsetChanging the Default Offset Reversing the OffsetOverriding the Duplex Offset Using the Dual VFOs for Duplex Operation Using Memory Channels Changing Stored SettingsStoring a Frequency Using Auto Memory Store AMS Tuning to a Standard Memory Channel Using the Calling-Frequency MemoryChecking Priority Channel Scanning Memory Channels Clearing a Memory ChannelEnabling/Disabling Scanning for Memory Channels Using Dtmf and Subaudible Tones Storing a Dtmf SequenceTransmitting a Dtmf Sequence Using Dtmf Using Group CallingName 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 Specifications GeneralReceiver Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas