User manual

407790A-en-US_v2.0 8/16

3.7TriggerModeSetupandOperation

Ameasurementcanbeinitiatedbyoneofthreetriggers:timetrigger(time‐controlled

triggering),leveltrigger(soundlevelcontrolledtriggering),andexternaltrigger(triggeringbyan

externalsignal).

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Leveltrigger1:Measurementstartswhenthetriggerlevelisexceededandendsafterthe

measurementtime.

Thetriggerlevelisvalidatanytime.

Settingitems:

TriggerSlopeType:+,‐

TriggerLevel:25to130dB,1‐dBsteps.

TriggerBand:MAINAP/31.5Hz/63Hz/125Hz….8kHz(1/3octavebands)

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Leveltrigger2:Singlemeasurementismadewhentriggerlevelisexceeded.

Thetriggerlevelisvalidatanytime.

Settingitems:

TriggerLevel:25to130dB,1‐dBsteps.

TriggerBand:MAINAP/31.5Hz/63Hz/125Hz…8kHz(1/3octavebands).

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Timetrigger:Thisisareoccurringtriggertimerthatstartsameasurementafteratriggertimer.

Themeasurementendsafterthemeasurementtime.

Thetriggertimerisvalidatalltimes.

Settingitems:

TriggerTime:h:m:s

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Externaltrigger:AMeasurementstartsatfallingedgeofalogic‐level(0to5Vlogic)signalatthe

externaltriggerinput.APulsewidthof1msormoreisrequired.

Theexternaltriggerisvalidatalltimes.

TriggerOperation‐example

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1. SoundLevel

2. Time

3. Slope+Trigger

4. Slope‐Trigger

5. TriggerLevel