User Manual

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Tocalibratethesystem,highlighttheRSSIMaxentry,and,withyourR/CtransmitterON,pressthe
menubutton.Thevalue totherightshouldchange,butalwaysremainataroundavalueof~200.
Next,reducethelengthofyourR/Ctransmitterantennabyslidingitdownintothe
transmitterand
movetheRCplanewiththereceiverawayfromit,graduallyincreasingthedistancebetweenthetwo.
You’llreachapointwheretheservosstartglitchingortheRxentersitsfailsafemode,thisisthepoint
wherethereceiverlosessignal.NowhighlighttheRSSIMinentry,and
pressthemenubutton.Thevalue
hereshouldbearound90formostreceivers.
WARNING:Ifthisprocedureisbeingperformedwhiletheequipmentisinstalledinamodel,andifpower
isappliedtothemotor,takeextremecareduringthistest.ManyPPMreceiverswillglitchtheservos,
and
cancausethemotortostartunexpectedly,onaPCMreceiverthemotorcouldbesettoaspecificthrottle
setting,alsocausingforthemotortostartrunning.
NotethatanalternativetechniqueforsettingtheRSSIMinthresholdistoswitchtheR/Ctransmitteroff
completely.Thishowever
willmeanthere’sagreyareawherethebehaviourofthereceivercannotbe
predicted.The0%settingwillnowcorrespondtotheR/Ctransmitterbeingoff,whichmeansyoucan’t
besurewhatsafetymarginisleftwhenyou’recloseto0%,asnormallyyouobviouslywouldn’tbe
turning
yourtransmitteroffinflight.
Also,takenoticethatRSSIisarelativeindicatorofsignalstrength,henceiftheRSSIhasdroppedto50%
thatdoesn’tmeanyoucanflytwiceasfarbeforelosingcontrol,mostRSSIsignalcurvesarenotlinear.
Anotherthingtowatchoutforis
thefactthatifsomeoneisusingthesameR/Ctransmitterfrequency
nearyouandyou’reflyingtowardsthisR/CtransmittertheRSSIcannotdistinquishbetweenthesignal
receivedfromyourtransmitterandtheothertransmitter,henceit’llindicatethereceivedsignal
strength,butyoucanstilllosecontroldue
tothefactthatthemodelisclosertotheothertransmitter
thanyours.
InsummarytheRSSIindicatorisjustthat,anindicator.Ifyouthinkyou’reflyingtofaroutyouprobably
are.Thesignalreceivedbythereceiverisinfluencedbyalargenumberoffactors,antennaor ientation
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(bothonthereceiverandtransmitter)isoneveryimportantone,we’drecommendalwayskeeping
enoughmarginleftforthereturnflightandusecautionandcommonsensewhenflyingfurtheroutby
usingtheRSSIasameansofdetermininghowmuchfurtheryoucanfly.

ImmersionRC|EzOSDManual
6
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