PicoQuant MultiHarp 150 - Page 75

PicoQuantGmbH MultiHarpSoftwareV.3.1.0.0
White Rabbit EEProm Data
InordertouseWhiteRabbitintheMultiHarpitisfirstnecessarytoprovidetheWRPCwithsomeconfiguration
data.ThisconfigurationdataisstoredinElectricallyErasableProgrammableRead-OnlyMemory (EEPROM)
andthecontrolsinthisgroupservethepurposeofediting,storing,andretrievingit.
ThetopmostsetofcontrolslabeledMACisusedtoassignaMediaAccessControl(MAC)addresstotheMulti-
Harp‘sWRnetworkport.TheMACisessentiallyastringof6bytesandmustbeuniquewithinyournetwork.If
youareconnectingtoanon-privatenetworkthenitshouldalsobegloballyunique
*
.Thebutton Readwillre-
trievetheMACaddressfromEEPROMandplaceitasahexadecimalnumberintheeditfieldontheleft.Ifthere
isnoMACaddressinEEPROMyoumaywanttoenteroneintheeditfield(asahexadecimalnumber)andthen
clickthebuttonWriteinordertostoreitinEEPROM.Thestatusfieldontherightwillshowsuccessorfailure
informationregardingthelastreadorwriteactivity.
Thenextsetofcontrolsfurtherdown,labeledInit Scriptisforconfigurationofaninitializationscriptthatruns
whentheWRPCstarts(i.e.whentheWRlinkisswitchedon,seebelow).Fordetailsofthescriptsyntaxplease
refertotheWRPCdocumentation. Theprocedureofreadingandwritingthescriptfrom/toEEPROMisthe
sameasdescribedfortheMACaddressabove.
Thenextsetofcontrolsfurtherdown,labeledSFP DATAisforconfigurationoftheSmallForm-factorPluggable
transceiver(SFP)module(s)beingused.TheWRsocketattheMultiHarp‘sfrontpanelisareceptacleforan
SFPmoduleconvertingbetweenelectricalandopticalsignals.TheSFPmodulesrequirecalibrationandthe
groupofcontrolsdescribedhereallowsfordepositingthecalibrationdatasothattheWRPCcanuseit.The
controlsandproceduresforediting,readingandwritingarethesameasdescribedfortheothertwocontrol
groupsabove.TheEEPROMprovidesspaceforcalibrationdataofupto4SFPmodules.Thiscorrespondsto4
linesintheeditboxontheleft.Thesyntaxforeachlineis
SFP-Module-nameDelta-TxDelta-RxAlpha
wheretheSFP-Module-nameisanASCIIstringgivenbythemodulemanufacturerandthefollowingthreecali-
brationvaluesaresigneddecimalnumbers.Allitemsareseparatedbyspaces.Notalllinesneedtobepopu-
lated.ThespecificcalibrationparametersmustbeobtainedbyacalibrationprocedureaccordingtotheWRPC
manual.IfyouorderSFPmodulesfromPicoQuanttheywillbeshippedasapairwiththefollowingnamesand
calibrationvalues(validasofApril2021):
ForusewithMultiharp150
AXGE-1254-053121846621872663293704
AXGE-3454-0531217080217320-60056437
ForusewithMultiharp160
AXGE-1254-053121634621710665750639
AXGE-3454-053122035422117464656656
YoucancopythesetwolinesdirectlyintotheeditfieldandwritethemtoEEPROM.Shouldothermodelsbe
shippedatalatertime,thecalibrationdatawillbeprovidedwiththemodules.IfyouobtainSFPmodulesfrom
othersourcesyouwillhavetorequestthecalibrationdatafromthesupplierorperformthecalibrationonyour
own.Forveryprecisecalibrationthisisrecommendedanyhow,asthecalibrationistosomeextentdependent
ontheparticulardevicesandfibersinuse.
WR Status
ThisgroupofcontrolsprovidesselectedstatusinformationoftheWRPC.Itmyberetrievedmanuallybyclicking
theRefreshbutton.ItmayalsoberetrievedperiodicallybycheckingthetickboxAuto.Notethatthestatusin-
formationisretrievedfromtheWRPC’sconsoleoutput,whichisavailableonlywhentheWRPCisrunningand
hasreceivedthecommandgui.
Start/Stop/Restart
Thisgroupofcontrolsprovidesadrop-downmenuformodeselectionandbuttonsformanualcontrolofthe
WRPC.TheusageofthesebuttonswillbeexplainedfurtherdownaspartofthedescriptionoftherelatedWR
initializationprocedures.
* OfficialandguaranteeduniqueMACaddressescanbeobtainedfromIEEE(http://www.ie ee.org )
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