Specifications

Maxiva ULX Series
November 11, 2013
5‐17
888‐2628‐300 WARNING:Disconnectprimarypowerpriortoservicing.
Copyright©2013,HarrisBroadcast
STEP 3 Turnonandadjusttransmitterto100%ratedvisualpeakpowerasindicatedonthe
GUIbargraph.
STEP 4 Removethesamplecablefromthesystemforwarddirectionalcouplertobe
calibrated(see
Figure5‐13).
STEP 5 Calibratethepowermeterandsetthepowermeteroffsettothevalueprinted onthe
coupler,orassuppliedwiththefactorytestdataandconnecttheaveragingpower
meterprobetothesystemcouplerforward(incident)port.
STEP 6 Notetheaveragepowermeterreading,andsubtractthesystemvisualaverage
powernotedinSTEP12oftheprocedure5.9.2.1fromtheaveragepowermeasured
here.Theresultistheforwardsystempower‐soundcarrierlevel.
STEP 7 Disconnectthepowermeterprobe,andreconnectforwardsamplecabletothe
coupler.
STEP 8 PressSystem>SystemService>SystemSetup>SystemPowerCalibratetoviewFigure
5‐9above.
STEP 9 ClickonthecorrespondingwindowforSysAural,openinganumericentrybox.
STEP 10 Enterthevalue(inkW)determinedinSTEP6above.
STEP 11 ClickonDONEtostorethechanges,orCANCELtoignoreallchangesmade.
STEP 12 Restorenormalvideoprograminputsignal.
STEP 13 Endofprocedure.
5.9.2.4 CalibrateCabinetForwardSound(aural)Power
TheCabPwrCalibratescreenisaccessedbypressingSystem>SystemService>CabinetSetup>CabinetPower
Calibrate.
STEP 1 Repeattheentireproceduredescribedin5.9.2.3onpage5‐16usingthecabinet
forward(incident)sample(asshowninFigure5‐11onpage5‐16),enteringthedata
inthecorrespondingCabAural(kW)window.
Note
Be sure to enter the forward (incident) coupler’s offset into the meter before making the measurement.
STEP 2 Endofprocedure.
5.9.3 ReflectedPowerCalibrate
ThisprocedureestablishesthevaluesusedtocalculatetheVSWRprotectionthresholdsforfoldbackandfault
events.Thesevaluesarebasedonthe"VisualPwrOut"valueenteredintotheSystemSetupscreen.
• Thefoldbackpowerlevel(basedonsystempower)canbesetbynavigatingtoSystem>SystemService>Sys‐
temSetup>SystemThresholdtodisplaytheThresholdSettingscreen.ThesysfldbckpwrlevelinWcanbe
enteredthere.Themaximumvalueallowedis2.78%oftheSystemPwrOut(W)valueonthe
SystemSetup
screen.The2.78%reflectedpowerlevelisequivalenttoa1.4:1VSWR.
• Thesystemfaultthresholdlevel(basedonsystemreflectedpowerlevel)canbesetbytheuser.Settingthe
faultthresholdlevelisdonebyenteringatripvoltagelevelintheSysReflectedwindowontheThresholdSet‐
tingscreen.Thevoltageenteredhereshouldcorrespondto100mVlessthan
thedetectedvoltagelevelthat
indicatedwhencalibratingthesystemreflectedpowerasdescribedin5.9.3.1CalibrateSystemReflected
Power.
• ThecabinetfaultthresholdissettoaVSWR=1.9:1atthefactoryandisnotadjustablebytheuser.A 1.9:1
VSWRcorrespondsto9.63% reflectedpower.