PicoQuant MultiHarp 150 - Inputs 1

PicoQuantGmbH MultiHarpSoftwareV.3.1.0.0
Sync Divider editboxandspincontrol
HeretheprogrammabledivideroftheSyncinputcanbeset.Thisallowstoreducethesyncinputratesothat
theperiodisatleastaslongasthedeadtime.Thisisrequiredforfastsyncsources(≥78MHz).Internallogic
determinesthesyncperiodandre–calculatesthesyncsignalsthatweredividedout.Itshouldbenotedthatthis
onlyworkswithstablesyncsourcesthatprovideaconstantpulse-to-pulseperiod.Allfastlasersourcesknown
todaymeetthisrequirementwithinanerrorofafewpicoseconds.Setthedivideronlyaslargeasnecessary.
Withrandomandlowratesignals(<1MHz),thedividermustbesetto'None'.
Trigger Output Period editboxandspincontrol
Thetriggeroutputcanbeusedtotriggeralightsource.Heretheperiodofthisoutputcanbeset.Theunitismi-
croseconds.Theallowedrangeis0.1µsto1.6s.
Trigger Output Force On checkbox
Herethetriggeroutputcanbeswitchedonregardlessofwhetherameasurementisrunning.
Trigger Output Auto On checkbox
Herethetriggeroutputcanbesettoturnononlywhenameasurementisrunning.Thiscanreducebleaching.
6.4.2. Inputs 1..8, 9..16, ...
Thesettingsinthesedialogtabsconfigurethebehavioroftheinputchannels.Seesection5.1“SettingUpthe
InputChannels“ togetstarted.The MultiHarp canhaveupto64inputchannels.Dependentonhowmany
channelsthedevicehas,oneormoretabswithcontrolelementsforthechannelswillbeshown.Thespecific
controlsforeachchannelaredescribedbelow.
Trigger Edge editboxandspincontrol
Herethetriggeredgefortheinputchannelcanbeset.Thevalue0standsforfalling,1standsforrising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immediatelywith-
outpressing<Enter>.
Trigger Level editboxandspincontrol
Herethetriggerlevelfortherespectiveinputchannel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.Alterna-
tively,usethespincontrol(nexttoit)toincrement/decrementthecurrentvalue.Inthiscasechangestakeef-
fectimmediatelywithoutpressing<Enter>.
Offset editboxandspincontrol
Shiftstherelativetimingof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.Al-
ternatively,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>.
Tdead editboxandspincontrol
TdeadisaprogrammabledeadtimeforsuppressionofafterpulsingartefactsofsomeSPADdetectors.Other-
wiseitisrarelyneeded.Leaveitat0unlessyouhavegoodreasons.
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