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

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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