Icom IC-4008E instruction manual Ctcss Continuous Tone Coded Squelch System

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CTCSS: Continuous Tone Coded Squelch System 6

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

CTCSS (Continuous Tone Coded Squelch System) GROUP MODE 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-4008E is equipped with 38 tone codes for CTCSS GROUP MODE use. Selecting a code applies it to all 69 oper- ating 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 sig- nals (including noise) push and hold [MODE]. Do not use CTCSS GROUP MODE if you want to be able to hear signals on all channels.

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Contents I4008E Foreword Supplied Accessories Page Table of Contents Panel Description ‘ Switches, controls, keys and connectors0VOLUME Control VOL ‘ Function display Answer Back Indicator see p‘ Accessory attachment AccessoriesAntenna Belt clip‘ Installing batteries in the battery case Battery Packs‘ About the battery pack ‘ Battery pack charging‘ Charging precautions Rapid charging with the BC-119L/BC-119+AD-89 ‘ Charging connectionsBasic Operation ‘ Power on‘ Adjusting the volume ‘ Selecting the operating channel Receive and Transmit ‘ Setting the group code Group Mode CtcssCtcss Continuous Tone Coded Squelch System Freq Ctcss code table‘ Call-Ring Ring Function‘ Smart-Ring Auto power OFF ‘ Initial set modeOther Functions Ring tone typeLock function PTT hold function‘ ATS Automatic Transponder System ‘ Low battery indicator‘ LCD backlight ‘ Auto power save‘ Resetting the transceiver ‘ Optional HM-75A functions Switch NormalGeneral SpecificationsOptions Battery packsChargers Speaker-microphonesChannel frequency list Memo‘ Channel number and group number Memo Memo 12 CE 0560 Count on us
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