Usl JSD-100 Spécifications télécharger pdf (Page 36)

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x SlowlyincreasethepoweramplifiergaintofullwhilewatchinganSPLmeterattheRTAmicrophone

position.Donotincreasethelevelabove85dBSPL.

x PushtheXCurvebuttonontheequalizertosettheinitialEQsettings.TheXCurvebuttonadjuststhe

equalizertothe

SMPTE202M1998Xcurvewithoutconsiderationofauditoriumacoustics.Itisa

suggestedstartingpointtoadjusttheroomequalizationtomatchtheXcurvespecifiedinthe

preceedingtable.

x Adjustthegaincontrol(outputtrim)ontheequalizeruntilameasuredsoundlevelof85dBSPLor

82dBSPLforsurroundchannelsispresent.

x AdjusttheRTAgaintoputthemidbandlevelat0dB.

x AdjusttheequalizercontrolstoputeachfrequencybandwithinthelimitsoftheXCurveasshownon

thetableabove.Asdiscussedabove,thedecaytimeshouldbeincreasedformorestableandprecise

measurementasyoucloseinonthefinalequalization.

x Turnoffthegenerator.

x CopytheequalizersettingstothenextchanneltobeequalizedusingtheCopybutton,asdescribed

above.Thenrepeattheprocessforthenextchannel.



LFEEqualizationProcedure



TheLFEorsubwooferchannelusesaparametricequalizerinsteadofagraphicequalizer.WhentheLFEis

selectedintheEqualizerwindow,theparametricequalizeradjustmentsbecomevisible.



x Aswiththeotherchannels,startwiththeamplifiergainallthewaydownandtheequalizergainall

the

waydown.

x Slowlybringuptheamplifiergaincontroltofullwithoutexceeding85dBSPL.

x AdjusttheequalizergaincontrolupuntiltheRTAshowsthesubwooferatthesamelevelasthemid

bandfrequencies(0dB).

x Adjusttheparametricfilterfrequencytothecenterofthe

worstpeakordipinthefrequency

response.

x SettheQto4,andthenadjustthelevelcontroltotakeoutthediporpeak.TheQcanbeincreasedto

narrowthecorrectionorreducedtomakethecorrectionwider.Adjustthelevel,frequency,andQ

forthe

bestlowfrequencyresponse.

x SelecttheoutputtabandclickGeneratorunderthecenterchannelslider.Atthispoint,thepinknoise

generatorshouldbedrivingboththeLFEandcenterchannels.Selecttheequalizertabagain.

x AdjusttheLFEgainandmakeminoradjustmentstotheLFEparametricfiltertogetasmooth

frequencyresponseoverthetransitionintotheLFEfrequencyrange.Itmaybenecessarytoflipthe

phaseoftheLFEspeaker.ThephasecanbechangedontheOutputstabusingtheInvertbutton

undertheLFEoutputlevelcontrol.

x Finally,ontheequalizertab,adjusttheLFEgainsotheLFEis10dBabovethemidrangefrequencies.



OutputsTab

Theoutputstabprovidesamethodoftrimmingtheoutputlevelofeachaudiochannel,mutingthechannel,

invertingthephase,ordrivingitwithagenerator(pinknoise,tone,oratonesweep).Thesecontrolsare

generallysetonebyonefromtheEqualizertab.Thistabmakesallthesettingsvisibleatonce.



GlobalTab

Globalsettings,thosethatdonotchangewithformatorEQset,aresetordisplayedhere.Underthistab,the

currenttimesettings,sleep

settings,status,andsurrounddelaycanbeobserved.Inaddition,thesleep

settingsandsurrounddelaycanbeset.



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Usl JSD-100 Spécifications Page 36

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