Specifications

Maxiva UAX
October 17, 2013
5‐25
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
STEP 5 Connectthevideosourcetothevideoinputofthetransmitter.Setvideo
sourcetoblackpicturewithzerosetup.
STEP 6 IfdualLPUsareinusesettheTCUDriverControltoManual.SelecttheLPU
tobecalibratedastheactiveLPU.
STEP 7 PressandholdtheLowerbuttonfor30‐40secondstoreducetransmitterRF
outputatturn‐on.UsetheTCULowerbuttonfordualsystems.UsetheLPU
LowerbuttonifasingleLPUispresent.
STEP 8 TurntransmitteronbypressingtheOnbutton.UsetheTCUOnbuttonfor
dualsystems.UsetheLPUOnbuttonifasingleLPUisinuse.
STEP 9 SetbothNon‐LinearandLinearRTACtoBypass.ThisisdoneviatheLPUfront
panelLCDorviatheLPUGUIscreenshowninFigure5‐14onpage5‐23.
STEP 10 StartcalibrationbynavigatingtotheSystemCalibrationscreenonleftin
Figure5‐13onpage5‐23.
STEP 11 SelectForwardcalibration.SelectStartCal.Note:thesoundcarrieris
automaticallyextinguishedoncetheCalroutineisstarted.
Caution
DO NOT DEPRESS THE POWER RAISE BUTTON FOR EXTENDED PERIODS
OF TIME WHILE RAISING POWER TO THE SPECIFIED CALIBRATION LEVEL.
HOLDING THE RAISE BUTTON IN CAN RESULT IN LARGE POWER
OVERSHOOTS THAT COULD DAMAGE THE PA MODULES. ADJUST POWER
SLOWLY BY MAKING DISCRETE BUTTON PRESSES WHILE CLOSELY
MONITORING THE EXTERNAL POWER METER FOR CHANGE. USE THE
DOUBLE UP ARROW GUI ICON TO RAISE POWER IN LARGER STEPS. USE
THE SINGLE ARROW ICON FOR SMALLER STEPS.
STEP 12 LOWPOWERCALIBRATION(10%)‐UsingtheUParrows(GUI)orPowerRaise
(frontpanelbuttons)ontheLPU,increasepowerlevelofthetransmitter
untilthedesiredlevelisindicatedonthepowermeter.RefertoAdjust
OutputPowersubwindowinFigure5‐13onpa
ge5‐23.
a.
Thesmalluparrowboxisforfineincrementsandthelargeboxisforlargersteps.
Itmayalsobenecessarytoutilizethedownarrowboxes.Severaladjustments
maybenecessary.
b. Maintainthedesiredlevelforseveralminutestoallowforthermalsettlingofthe
poweramplifierstages.
c. PresstheSavebuttontostorethecali brationsettingtomemory.
STEP 13
HIGHPOWERCALIBRATION(100%)‐UsingtheUParrows(GUI)orPower
Raise(frontpanelbutton)raisethepowerofthetransmitteruntilthe
desiredlevelisindicatedonthepowermeter.
a.
Thesmalluparrowboxisforfineincrementsandthelargeboxisforlargersteps.
Itmayalsobenecessarytoutilizethedownarrowboxes.Severaladjustmentswill
benecessary.
b. Maintainthedesiredlevelforseveralminutestoallowforthermalsettlingofthe
poweramplifierstages.
c. PresstheSavebuttontostorethecali brationsettingtomemory.
STEP 14
Press“CalibrationComplete”tofinishandexitthecalibrationprocedure.If
youdonotperformthisstep,thecalibrationwillnotbeaccepted.
STEP 15 Preliminarycalibrationprocedurecomplete.ProceedtoFinalAnalogCal
Procedure(Section5.6.2.
2).