394149/C
191
MeasuringnoiseinPassivemode
Lownoiseisakeyfactorforhighqualityandreliablemeasurements.
Prerequisites
ThisprocedureassumesthattheEK80systemhasbeeninstalledasspeciedintheEK80
Installationmanual.
Nospecictoolsorinstrumentsarerequiredforthistest.
Context
ThisprocedureshallverifythatthenoiselevelinPassivemodeisacceptable.
Procedure
1OperateallrelevantfrequenciesinPassivemodewith1,024mspulseduration.
2PreparetheEK80toreadthenoisevalues.
aOntheOperationmenu,clickNormalOperationtoopenthedialogbox.
bIntheNormalOperationdialogbox,setModetoPassive.
cOntheDisplaymenu,clickDisplayOptionstoopenthedialogbox.
dIntheDisplayOptionsdialogbox,enabletheNoisetooltip.
3Placethecursorovertheechogram,andobservethetooltipinformation.
4Readthenoisevaluesforeachchannel.
Writedownthemeasurednoisevalue.
Settingtowork