Specifications

Section-3 Operation
October 17, 2013
3‐2
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WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
3.2.3 LPUControlPanel
TheLPU(LowPowerUnit)frontisshowninFigure3‐1onpage3‐3.ItcontainsanLCDscreen,controlbuttonsand
LED’sasshowninFigure3‐2onpage3‐3.
Table3‐1LPUFrontPanelControlButtons
Field Explanation
STATUS Displaysth
eStatusMenu.
POWER
Displaysmode
lnumber,forward/reflectedpowerlevelsandallowsselectionoflinearandnon‐
Linearcorrection‐Stored,Adapt,HoldorBypass.
SETUP Displaysth
eset‐upmenusontheLCD.
UP/DOWN/LEFT/RIGHT
Usedfo
rLCDmenunavigation.Theupanddownbuttonsareusedtomovethearrowcursor,which
indicatesthemenulinethatwillbeactivatedbypressingtheblackenterbutton.Theleftbuttonis
primarilyusedasabackbuttontoreturntoapreviousmenuselection.
ENTER
Thisisthebl
ackbuttoninthecenteroftheUP/DOWN/LEFT/RIGHTbuttons.Usedtoselectorexpand
LCDmenuitems.
REMOTEENABLE Allowsre
motecontroloftheLPU.
REMOTEDISABLE
Disablesre
motecontroloftheLPU.TheTCURemote/Disablebutton(whenpresent)overridesthe
LPUcontrol.
POWERRA
ISE
InAu
toPowercontrol,pressingPOWERRAISEwilladjusttheRFpoweroutputbyraisingtheFWD
POWERREFERENCEsetting.InManualPowercontrol,pressingPOWERRAISEwilladjusttheRF
poweroutputbydirectly increasingtheUDCRFATTENDACvalue.
POWERLO
WER
InAutoPowercontrol,pre ssingPOWERLOWERwilladjusttheRFpoweroutputbyloweringtheFWD
POWERREFERENCEsetting.InManualPowercontrol,pressingPOWERLOWERwilladjusttheRF
poweroutputbydirectly decreasingtheUDCRFATTENDACvalue.
Table3‐2StatusLEDs
StatusLEDs State s Explanation
TSINPUT Green=OK
Amber/Yellow=Warning
Red=Fault
Representstheavailabilityofthetransportstreaminputdatato
themodulator.ThebehavioroftheTSinputLEDvarieswith
modulationstandard.
DRIVECHAIN Green=OK
Amber/Yellow=Warning
Red=Fault
RepresentsasummarystatusoftheLPUPAi.e.theampl
ifier
sectionoccupyingthelowerhalfoftheLPUchassis.
POWERAMP Green=OK
Amber/Yellow=Warning
Red=Fault
Off=N/A
RepresentsasummarystatusoftheexternalPAblocks1‐4.Ifno
externalPAblocksarepresentforthecurrentTXmodel,LEDis
OFF.
POWERSUPPLY Green=OK
Red=Fa
ult
RepresentsasummarystatusofthesignalprocessorPower
Supplies(+24V,+12V,+5V,+3.3V,+1.4V,‐12V).