775-000001HYPERIONPeakDetectionSettingsrev.A

August22,2016

Technical Note: HYPERION Peak Detection Settings OVERVIEW

ThisdocumentprovidesinstructionsonhowtomodifythepeakdetectionsettingsonaHYPERIONinstrument,usingthe“ManageDetectionSettings”PCapplication.

Eachinstrumentcanstoreandaddress256peakdetectionpresets:128userconfigurablepresets,plus128morefactorysettings.Individualchannelsontheinstrumentcanbeassigneddifferentpresets,whichallowsyoutoaccommodatechannelswhichmayhavesensorsofdifferenttypesthatrequiredifferentsettings.

It’sworthnoting,forthebenefitofusersofourolderinstruments,thattheHYPERIONinstrumentsuseafundamentallydifferentpeakdetectionalgorithmthanthex25orx30interrogatorcores.InHYPERIONinstruments,wewantedtoprovideawaytoperformthepeakdetectionrightintheinstrument,sothatENLIGHTwasn’tneededtofindthepeaks.Wewantedtobeabletostreamthepeakwavelengthsforsensorson16channels,atupto5kHz.Thismeansthatweneededamoreefficientmethodofpeakdetection.Someveryinnovativepeakdetectionalgorithmsresultinourabilitytofindthepeaksfaster,whilemaintainingthehighlevelofprecisionyou’vecometoexpectfromMicronOpticsinterrogators.

ApplicationNote:HYPERIONPeakDetectionSettings

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APPLICATION

Thisistheprimaryinterfaceusedtomanagethedetectionsettingsforyourinstrument.Thedifferentareasoftheinterfacearenumberedanddescribedbelow.

1. Eachchannelofyourinstrumentcanutilizeadifferentsetofdetectionparameters.Thetoparrayofinformationshowswhichpresetiscurrentlyassignedtoeachchannelontheinstrument.

2. Savedpresetscanbeselectedfromthisbox.Clickontheboxtorevealalistofpresets.Theparametersofthepresetarethendisplayedontheright(4).

3. Theselectedpresetcanbeappliedtoanychannelsyouprefer.Clickingthe“ApplySelected…”buttonwillassignthecurrentsettingtothechannelsselectedbythecheckedboxes.

4. Thisareaallowsyoutomodifyanyoftheparametersassociatedwithagivenpreset.Tocreateyourfirstcustompreset,you’llneedtopress“CopyPreset”tocopythecurrentpresetintoanewpresetindex;itwilldefaultto1.Whenyouarehappywiththenewname,description,andparameters,pressthe“SaveChanges”buttontocommitthechangestotheinstrument.You’llthenneedtoapplyyournewpresettoyourdesiredchannels.“DeletePresets”willremoveunwanteduserpresets.

5. Thesimulationareaallowsyoutochangetheparametersandseehowthoseparameterswouldaffectoneofyourcurrentchannels.Notethatthesechangeswillnotbesavedunlessyouexitthesimulationandclick“SaveChanges”.Clicking“RunSimulation”willtakeyoutoanewscreencalled“ParameterSimulation”;seenextsection.

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ApplicationNote:HYPERIONPeakDetectionSettings

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DEFINITIONS

Thefollowingtableprovidesfurtherdetailsaboutthetermsusedinregardtothedetectionparameters.

Parameter Description

Index Thisisthepresetidentificationnumber.Userscancustomize1-127,and128-256arereservedforfactoryuse.

Name Thistextfieldshouldbekepttoamaximumof25characterstoensureitispresentedclearly.

Description Userconfigurablefield,whichisonlydisplayedintheconfigurationtool,notinENLIGHT.

ThresholdLevel Thisisthethresholdabovewhichapeakmustrisebeforethepeakdetectionalgorithmisapplied.Thepurposeistoavoidlookingforpeaksinthenoisefloor.Thisvalueisdimensionless,andappliestothedifferentialtrace.Considerstartingwithavalueof1000forourstandardinstruments,and10,000forEVinstruments.

AveragingWindow(pm) Inordertoreducenoise,werecommenduseofanaveragingwindowthatisapproximatelyaswideasthefeatureyou’retryingtodetect.Soa250pmwidepeakwouldusea250pmwindow.

PeakWidth(pm) Thisisthewidthoverwhichthecenterofthepeakisfound.Thisshouldnominallybesettothe3dBwidthofthepeakyou’retryingtolocate.

SearchWindow(pm) Thisdefinesthemaximumwidthoverwhichthealgorithmwillcontinuesearchingforapeak,beginningasthesignalcrossesyourdefinedthreshold.

LockoutPeriod(pm) Thisisahold-offperiodwhichdelaysthepeakdetectionalgorithmforaperiodafterthedifferentialsignalcrossesthethreshold.Thegoalhereistopreventlow-levelside-modesfrombeingdetectedaspeaks.Thisshouldbeleftat0unlesstheAveragingWindowandPeakWidthsettingscan’thelp.

DetectionMode TheHYPERIONfirmwarecandetecteitherpeaksorvalleys.

ApplicationNote:HYPERIONPeakDetectionSettings

MicronOptics,Inc.|1852CenturyPlaceNE,AtlantaGA30345USA|www.micronoptics.com

SIMULATION

Toassistwithchoosingthebestparametersforyourspecificsensors,wehavecreateda“simulation”toolwhichallowsyoutoseetheeffectsofchangestothepeakdetectionparametersbeforeactuallyapplyingthosechangestotheinstrument.

6. Therawspectraldataisplottedindarkblue.Theaveragedtraceisinlightblue.Thedetectedpeaksareidentifiedwithorangelines.Asyouincreasetheaveragingwidth,you’llnoticethelightbluetracebecomewiderandlower.They-axisisinrawcountsfromthedetector’sanalogtodigitalconverter(ADC).Youcanusethegraphcontrolsundertheplottozoomintoyourdesiredlevel,andthislevelofzoomtransferstoplots7&8also.

7. The“powercalibratedrawspectrum”simplyshowstherawspectruminunitsofdBminsteadofrawcountsontheADCthatareshownintheplotabove(6).

8. Thisiswheretheparametersreallybecomeclear;thisisthetraceuponwhichpeakdetectiondecisionsaremade.Youcantweaktheparametersandseehowtheyaffectthepeaksdetected.Thedifferentialsignalshowstheslopeoftheaveragedtrace(lightblueinPlot1).ThePeaksandZeroCrossings(wheretheslopegoestozeroatthetop/bottomofapeak/valley)aremarkedinorange.

Thethresholdisshownasapurplehorizontalline.Thesearchwindowisshadedlightgray.Thelockoutwidthisshownindarkgray(whenset>0).TheDetectionModeallowsyoutoswitchbetweenpeakandvalleydetection.Theverticalmarkersindicatethelowedgeofthedetectedpeak(definedbythepeakwidthparameter).

9. Youcanmodifyparametersheretoseetheireffectonthepeaks.You’llwanttoconfirmthatallofyourpeaksareidentifiedandproperlylocatedinthetop-leftplot.Youcanalsoreviewthe“Peaks

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ApplicationNote:HYPERIONPeakDetectionSettings

MicronOptics,Inc.|1852CenturyPlaceNE,AtlantaGA30345USA|www.micronoptics.com

Detected”indicator(inthetoprightcorner)tobesurethatallpeaksaredetectedwiththecurrentsettings.

Whenyouexitthesimulation,theparametersarecopiedtothemainscreen.Youcanchoosetosavethese,ordiscardthem.

FACTORY PRESETS

Presetsnumbered128-256arereservedforfactoryuse.Thefollowingtableliststhosefactorypresets.

Preset# Name128 0.25nmPeak129 0.5nmPeak130 1.0nmPeak131 0.25nmPeak(EV)132 0.5nmPeak(EV)133 1.0nmPeak(EV)134 0.25nmPeak(LT)135 0.5nmPeak(LT)136 1.0nmPeak(LT)196 0.25nmValley197 0.5nmValley198 1.0nmValley199 0.25nmValley(EV)200 0.5nmValley(EV)201 1.0nmValley(EV)202 0.25nmValley(LT)203 0.5nmValley(LT)204 1.0nmValley(LT)

Presets128-130willworkformostinstrumentsandmostsensors.

“EV”presetsaredesignedtobeusedwithourEnhancedVisibilityinstruments,whichhaveagreaterdynamicrange.

“LT”presetsaredesignedtobeusedin“LowThreshold”situations,wherethesensorpeaksareveryclosetothenoisefloor,requiringaverylowthresholdparameter.

ApplicationNote:HYPERIONPeakDetectionSettings

MicronOptics,Inc.|1852CenturyPlaceNE,AtlantaGA30345USA|www.micronoptics.com

ENLIGHT INTEGRATION

ForusersutilizingENLIGHT,thepeakdetectionpresetscanbeselectedonthe“Acquisition”tabintheGroupboxesatthebottom.Thedrop-downlistispopulatedwiththefactorypresets,inadditiontoanycustompresetsthathavebeendefinedonthatinstrument.

API INTEGRATION

Custompeakdetectionpresetsmustbecreatedusingthisexecutabletool,butthesavedpresetscanbeselectedviasoftwarecontrol.TheHYPERIONsoftwareAPIshavebeenupdatedtoincludecommandsfordefiningandselectingpresets.PleaseconsultthesoftwaresectionoftheHYPERIONmanualfordetails.

SUPPORT

Ifyouneedadditionalsupport,pleasecontactsupport@micronoptics.com