Icom iF22SR instruction manual What is Ctcss Continuous Tone Coded Squelch Sys- tem ?

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GLOSSARY 8

What is CTCSS (Continuous Tone Coded Squelch Sys- tem) ?

CTCSS (Continuous Tone Coded Squelch System) allows communication with silent stand by. Only signals containing your group code can open the squelch.

This conveniently eliminates unwanted audio and is useful in group activities or security related activities where unwanted output can be a problem. Note that CTCSS group mode is not private—anyone can receive your calls.

The IC-F22SR is equipped with max. 52 tone codes for CTCSS use. Selecting a code applies it to all 8 operating channels. Each push of [PTT] superimposes your group code over your transmit signal; and, only signals containing the same code can open your squelch. To temporarily hear all signals (including noise) push and hold [MONI]. Do not use CTCSS if you want to be able to hear signals on all channels.

Auto Scan function + Smart-Ring

The Auto Scan function searches for signals automatically and makes it easier to locate new stations for contact or lis- tening purposes. BUT because the Auto Scan function checks each operating channel for only a few moments, the transceiver's response accuracy to Smart-Ring calls is re- duced. Use one of CH 1–15 when you and your group are going to use the Smart-Ring function, otherwise the Smart- Ring function may fail to answer-back the call.

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Contents IF22SR Foreword Supplied Accessories Page Table of Contents Panel Description ‘ Switches, controls, keys and connectorsPTT Switch PTT VOLUME/POWER Control VOL/POWERTX/RX Indicator LED LED Channel Selector CHBrink patterns ‘ LED indicatorBattery Packs ‘ Battery pack replacementBattery Packs ‘ Battery cautions Regular charging with the BC-146 ‘ Battery chargingRegular charging with the BC-146 Rapid charging with BC-144+AD-99 Rapid charging with the BC-121+AD-94 #11‘ Charging Note Battery pack life‘ Battery case Option ‘ Receiving and transmitting Basic OperationChannel RX/TX Freq. MHz*1 CH spacing Tone Hz*2 Frequency channel/CTCSS tone list default‘ Auto Scan function ‘ Setting squelch level‘ Setting the group code number Using the Ctcss Tone CodeExample Push PTT FreqTurn the squelch function ON/OFF Ctcss FindUsing the Dtcs Code Example Ring Function Smart-Ring operation see rightSelect the Call-Ring melody Call your group member with Call-Ring melody Smart-Ring operationAudible condition Other Functions‘ Power save function Mic Down Key Push Push and hold Mic UPMic a Mic BGeneral SpecificationsOptions ‘ OptionsCharger Other Options HM-46L/HM-75A/HM-131L Speaker Microphone Glossary What is squelch?What is Ctcss Continuous Tone Coded Squelch Sys- tem ? About CE IcomEurope0168GmbH Count on us