PicoQuant MultiHarp 150 - Control Panel; Sync-Input; Trigger out

PicoQuantGmbH MultiHarpSoftwareV.3.1.0.0
6.4. Control Panel
Thecontrolpanelconsistsofseveralsectionscontainingeditboxesandothercontrolsforrelatedparameters.
Thesearedescribedinthefollowingsubsections.Notethatthesettingsofthecontrolpanelaswellastheposi-
tionofthecontrolpanelonthescreenwillbestoredintheregistryandretrievedatthenextprogramstart.When
youloadaMultiHarpdatafilethesettingsofthecontrolpanelwillchangeaccordingtothesettingsinthatfile.
Thiscanbeusedasameansofrevertingtoastandardsettingforthegivenexperiment.
6.4.1. Sync–Input / Trigger Out
ThesettingsinthisgroupconfigurethebehavioroftheSyncinputandtheTriggeroutput.Seesection5.1“Set-
tingUptheInputChannels“togetstarted.
Sync Trigger Edge editboxandspincontrol
Herethetriggeredge(rising/falling)fortheSyncinputcanbeset.Thevalue0standsforfalling,1standsforris-
ingedge.Typethevalueasanintegerintheeditboxandpress<Enter>orclickonApply.Alternatively,use
thespincontrol(nexttoit)toincrement/decrementthecurrentvalue.Inthiscasechangestakeeffectimmedi-
atelywithoutpressing<Enter>.
Sync Trigger Level editboxandspincontrol
HerethetriggerlevelfortheSyncinputcanbeset.Unitsaremillivolts(mV),thepermittedrangeis-1200to
1200.Typethevalueasanintegerintheeditboxandpress<Enter>orclickonApply.Alternatively,usethe
spincontrol(nexttoit)toincrement/decrementthecurrentvalue.Inthiscasechangestakeeffectimmediately
withoutpressing<Enter>.
Sync Offset editboxandspincontrol
ShiftstherelativetimingofSyncandphotoneventsandisdesignedtocompensateopticalandelectricaldelays
(duetodifferencesincablelengthsandopticalpaths),e.g.,inordertoshiftyourfluorescencedecaywithinthe
syncframesothatitisnottruncated.Thisfeaturecompletelyeliminatestheneedforadjustabledelayboxes.
Unitsarepicoseconds(ps),thepermittedrangeisfrom−99,999to+99,999ps.Typethevalueasanintegerin
theeditboxandpress<Enter>orclickonApply.Theoffsetvaluecanbeenteredinstepsofpicosecondsbut
notethattheactualstepisonetimebinaccordingtotheinstrument’sbaseresolution(5,10or80psdependent
onthemodel).Alternatively,usethespincontrolnexttotheeditboxtoincrement⁄decrementthecurrentvalue.
Inthiscasechangestakeeffectimmediatelywithoutpressing<Enter>.
Sync Tdead editboxandspincontrol
Tdeadisaprogrammabledeadtimeforsuppressionofafterpulsingartefactsofsomedetectors.Onthesyncin-
putitisrarelyneeded.Leaveitat0ifyouworkwithasyncsignalfromalaser.
Unitsarenanoseconds(ns),thepermittedrangeisfrom0to160ns.NotethatTdead=0doesnotreallymean
zerodeadtime,instead,theinputwillthenoperateatitsshortest(native)deadtimeofabout650ps.Whena
deadtime>0issetthenthetiminghardwarewillsuppresseventsfallingintothedeadtime.Thisisonlyasup-
pressionoffurtherprocessinganddoesnotpreventtheTDCtogointoanother(native)deadtime.
Typethevalueasanintegerintheeditboxandpress<Enter>orclickonApply.Thevaluecanbeenteredin
stepsofnanosecondsbutnotethattheactualstepisapproximatedonlytotheinstrument’sbaseresolution(5,
10or80psdependentonthemodel).Alternatively,usethespincontrolnexttotheeditboxtoincrement⁄decre-
mentthecurrentvalue.Inthiscasechangestakeeffectimmediatelywithoutpressing<Enter>.
Theprogrammabledeadtimeisonlyavailablewithsuitablefirmware(“gateware”),whichmustbeversion0.8or
higher.DevicesshippedafterSeptember2019willhaveitbydefault.OtherwisetheeditboxforTdeadwillre-
maingrayedout.Olderdevicescanbeupgraded,pleasecontactPicoQuant.
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