User's Guide

listenermayloseawarenessofthenoisyenvironment.Taitrecommendsusersimplementsupplementaryprocedures
toaccountforthis.
Coverage
Withdigitalnetworks,acallremainsclearandthendropsoffquicklyattheborderofacoveragearea.Thereasonfor
thisisthatadigitalcalliseitherreceivedoritisn't.Withanalognetworks,thebackgroundnoiseinacallgetspro-
gressivelyworsewhentheuserisinfringeareasorevenslightlyoutsidenormalcoverageareas.
What is audible on an analog channel
Onanalogchannels,theradiomaybeprogrammedsothatallconversationsonachannelcanbeheard,oroneuser
groupmaybesegregatedfromotherusergroupsthroughspecialsignaling.Thespecialsignalingisusedtocontrolthe
mutingandunmutingofradios,sothatyourradioismutedwhenotherusergroupsaretalkingandunmutedformem-
bersofyourusergroup.
Therearetwomutingcontrolsthatoperateinyourradio:
•signalingmute
•squelch
Signalingmute
Theradio’ssignalingmuteonlyallowstheradiotounmuteiftheincomingcallcarriesthetonesspecifictoyouruser
group.Yourusergroupmayusetonesthatareeitheraudible,subaudibleorboth.
Squelch
Theradio’ssquelchallowstheradiotounmuteonlywhenthestrengthoftheincomingsignalisaboveapre-
determinedthreshold.Thismeansthatonlysignalsofreasonableintelligibilityaremadeaudible.
About the Radio Controls
TheradiocontrolsarethePTTkey,power/volumecontrol,channelselector(doesnotapplyintrunkedmode),3-way
selectorcontrol,scrollkeys,selectionkeys,andfunctionkeys.Somekeyshavefunctionsassignedtobothshortand
longkeypresses:
•ashortkeypressislessthan0.75s,and
•alongkeypressisusuallymorethan0.75s.
Theradiocontrolsandtheirfunctionsaredescribedinthefollowingsections.
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Tait International Ltd December 2019