Specifications

Maxiva UAX
October 17, 2013
4‐11
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
ThePowerSupply’soutputtotheLPUisviaaribboncabletothesignalprocessorboard.Powertotheotherboards
issuppliedviathesignalprocessorboard.
Thebl
ockdiagramofthelowvoltagepowersupplysystemisshowninFigure4‐6onpage4‐11.
TheLPUmodul
atorsectionhasafilteredIEC320/C14ACinputconnector.TheLVPSDistributionboardacceptsAC
voltagesintherangeof100‐240VACat50‐60Hz.Theinputsar efusedbya4A,250Vslowblowfuse.Themaximum
powerforthemodulatorsectionoftheLPUis18
0W.
TheACinp
utforeachofthetwolowvoltagepowersuppliesis100‐240Vacat50‐60Hz.TheECM100UT32power
supplyiscapableofdelivering+5.0Vat10A,+24.0Vat2A,and‐12.0Vat0.8A.TheECM60US12powersupplyis
capableofdelivering+12.0Vat5A.
Bothpo
wersuppliesaremounteddirectlytothe LVPSDistributionboardbysnap‐topPEMstandoffs.TheLVPS
boardwillhaveprovisionsfortwo+12Vdcfans.Thefanswi llbefusedwithaPTCat1.35Aandthedcinputwillbe
filtered.
Figure 4-6 Low Voltage Power Supply Block Diagram
4.3.10 BatteryBackup971‐0035‐003G(optional)
ThebatterybackupboardinterfacesdirectlytotheLVPSboard.TheLVPSboardsupplies
amaximumof+12Vat1.3Atothebatterybackup.ThebatterybackupsuppliestheLVPS
boardwith+12Vbattat1Amaximum.TheboardismounteddirectlytotheLVPSboard
usingsnap‐topPEMstandoffs.Abl
ockdiagramofthebatterybackupmoduleisshownin
Figure4‐7.
Theba
tterybackupdaughterboardspecificationsareasfollows:
• Batterybackuppoweredoffoffour1.2volt2700mA‐hrNi‐MH(NickelMetalHydride)
batteries
• Includestricklechargertomaintainbatterycharge
• Allows30minutesofbackupat1amp(maximumbackupcurrent)
• Allows45minutesofbackupwhenpoweringmodulatorsystem
• TheBatteryBackupmaintainspowertothe10MHzand1PPSInputcircuitryontheSignal
ProcessingboardandtheFPGA,OCXOandGPScircuitryonthePFRU.Bypoweringthese
circuitstheexcitercanmaintainthe10MHzOCXOdisciplineloopwhentheexciterloses
power.TheOCXOcantakethreeminutestostab
ilizefromacoldstartandthediscipline
loopitselfcantakeanhourtoreachthemaximumprecision;havingthedisciplineloop
activeduringapoweroutageenablestheexcitertoreturntoairfasterwithgreater
frequencyaccuracy.Thebatterybackupisspecifiedtoholdthemodulatorupth
rough
fifteenminutepoweroutages.
J1, AC Input
100 to 240 VAC
50 to 60 Hz
+12 V
PS1
PS2
TP7
J1 - 31 - 34
+5 V
TP6
J1 - 21 - 28
+24 V
TP2
J1 - 39 - 40
-12 V
TP1
J1 - 35 - 36
J2-1
J2-2
J2-3
J4-1
J4-2
J4-3
Fan 1
Fan 2
+12 V
+12 V
Fan Tach1, J1 - 8
Fan Tach2, J1 - 11
Grounds, J1 - 9, 10, 15-20, 29,
30, 37, 38