Specifications

Section-3 Operation
October 17, 2013
3‐26
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004

TheSystemCalibrationscreenwalkstheuserthroughthepowercalibrationprocedure.Tostartcalibration,theuser
selectsacalibrationtypeandpressesStartCaltobegin.
Note
The Transmitter must be ON prior to beginning any calibration.
CalibrationtypesareoutlinedbelowinTable3‐17.
Whenc
alibrationisinprocess,thescreeninFigure3‐26(right)willappeartoallowadjustmentsoftheoutput
power.
Thearr
owsontheleftofthescreendirectlyadjusttheUDCRFattenuatorDAC.(RFDACvaluedisplayedintop
window)Thesinglearrowswillincreaseordecreasethevalueby0x0001(1decimal)increments.Thedoublearrows
willincreaseordecreasetheRFDACvalueby0x0010increments(32deci
mal).
Duetothedela
yedupdaterateofthewebbrowser,theusershouldnotrelyontheRFDACValuedisplayedonthe
GUItodetermineifpowerisbeing raisedrealtime,asthiscancauseundesiredovershoots.Instea dtheuseris
advisedtomonitortheexternalpowermeteratalltime
swhileadjustingtheoutputpower.
TheAD
CvaluedisplayedrepresentstheADCdetectorreadingcorrespondingtothecalibrationtypeselected.(if
calibrationtype=FactoryForward,theADCvaluewi lldisplaythesystemforwardpowerdetector.)
Oncethecorrectpowerisdisplayedontheexternalpowermeter,theSavebuttonwillproceedtoeitherthenext
calibrationpoint,orwillcompletethecalibrationprocess.Tocancelthecalibrationprocesswithoutsavinganydata,
selectCancel.
Table3‐17UAXHome>Config>Cal(calibrationtypes)
Field Explanation
Forward
Forwardcalibratesthesystemforwardpowermeter.Thisisatwopointcalibrationprocessthatsavescalibration
pointsatalowcalibrationpoint(approximately10dBdownfromthetransmittermodelpower)andahigh
calibrationpoint(1dBabovetransmittermodelpower).Forwardcalibrationisrequiredifthetransmitterisse
tto
operateanewfrequency.
Reflected
Thereflectedcalibrationwillcalibratethesystemreflectedpowermeter.Thereflectedcalibrationshouldbe
performedatthesamefrequencyasthefactoryforwardcalibration.Thisisatwopointcalibrationprocessthat
save scalibrationpointsatalowcalibrationpoint(approximately30dBdownfromtheTransmitterModelPower)
andahighcalibrationpoint(approximately10dBdownfromtheTransmitterModelPower).Theuserwillbe
promptedraiseforwardpowertoneartheTransmitterModelPower,andtousea20dBpadwhensavingthelow
point.Thepadisremovedtosavethehighpoi
nt.Forwardcalibra tionisrequiredifthetransmitterissetto
operateanewfrequency.
UDCOut
UDCOutcalibratetheUDC outputpowermeter.TheUDCoutputcalibrationisrequiredforeach
frequencychange.Thisisatwopointcalibrationprocessthatsavescalibrationpointsatalow
calibrationpoint(4dBmor2.5mW)andahighcalibrati onpoint(20dBmor100mW).Note:TheUDC
Outputcalibrationwillbeperformedinthefactorypriortoshippi ngthetransmitter.If thecalibration
isdeletedforanyreason,awarningwillpersist statingthattheUDCoutput isnotcalibrated.Ifthe
UDCoutputisnotcalibrated, theUDCoutput powerli mitsettingcannotbeenforced
.See"5.4.5
CalibrateLPUUDCOutput"onpage5‐12.
PAB#Forward
PABforwardcalibratesthePABforwardpowermeter.Thisisatwopointcalibrationprocessthatsavescalibration
pointsatalowcalibrationpointandahighcalibrationpoint.PABcalibrationisnotrequired.Thesystemwill
produceoutputpowerev
enifthePABsarenotcalibrated.IfthePABpowerisnotcalibratedthepowerwillbe
displayedasalineonthescreen.
PAB#
Reflected
PABreflectedcalibratesthePABforwardpowermeter.Thisisatwopointcalibrationprocessthatsavescalibration
pointsatalowcalibrationpointandahighc
alibrationpoint.PABcalibrationisnotrequired.Thesystemwill
produceoutputpowerevenifthePABsarenotcalibrated.IfthePABpowerisnotcalibratedthepowerwillbe
displayedasalineonthescreen.