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Agilent Technologies Agilent 35670A manual Assessing Measurement Quality

Models: Agilent 35670A

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AGILENT 35670A

Supplemental Operator’s Guide

•Toggle the [AUTOSCALE ON OFF] softkey (F1) until ON is highlighted.

•Press the [Active Trace] hardkey.

•Press the [ A ] softkey (F2).

•Press the [Trace Coord] hardkey.

•Press the [MORE CHOICES] softkey (F6).

•Press the [REAL PART] softkey (F2).

•Press the [Active Trace] hardkey.

•Press the [ B ] softkey (F2).

•Press the [IMAGINARY PART] softkey (F3).

Assessing Measurement Quality

Measurement quality is described by coherence, which varies from 0 to 1. To set up a coherence display, follow these steps:

•Press the [Meas Data] hardkey.

•Press the [COHERENCE 2 / 1] softkey (F7).

A coherence value of 1 means the response measured by Channel 2 was due to the excitation of Channel 1. A coherence of 0 means that none of the response of Channel 2 was due to the input measured by Channel 1.

Burst random excitation usually exhibits excellent coherence unless non-linearities are excited.

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Agilent Technologies Agilent 35670A manual Assessing Measurement Quality

Contents

Supplemental Operator’s Guide for the Agilent 35670A Dynamic Signal AnalyzerAGILENT 35670A Supplemental Operator’s Guide SECTION 13 ORDER DOMAIN RESULTS IN LIST MODE SECTION 24 PLOTTING AND PRINTING TRACE DATA Section 1 Turning On the AGILENT 35670A Freq Inst ModeMeas Data Trac Coord Coord ASection 3 Measuring with Transducers Using ICP-TypeTransducers with the AGILENT 35670AUsing Transducers with External Preamplifiers Specifying Transducer Sensitivity and Units Selecting Frequency Span Setting Up Transducer Units for DisplacementSelecting Single Channel Operation Frequency Spans Available for the AGILENT 35670A Quantifying Power Spectrum Results Section 5 Improving Measurement Results Frequency Zooming to Increase ResolutionMaximizing Dynamic Range Averaging to Reduce Measurement Variance AGILENT 35670A Supplemental Operator’s Guide Selecting Single Channel Operation AGILENT 35670A Supplemental Operator’s GuideDisplaying Time Waveforms Selecting Time Record LengthEvent Triggering Quantifying Time Trace Results Selecting Frequency Span Presetting the AnalyzerSelecting Dual Channel Operation Section 7 Measuring Dual Channel SpectraUsing Markers with Dual Channel Measurements Coupled Markers with Peak Tracking Coupled MarkersMaximizing Dynamic Range Dual Channel AveragingAGILENT 35670A Supplemental Operator’s Guide Selecting Time Record Length Displaying Dual Time WaveformsSection 9 Measuring Dual Channel Time Waveforms Selecting Dual Channel OperationTriggering a Dual-ChannelTime Measurement Arming Dual Channel Time MeasurementsTrigger Delay Using Markers with Dual Channel Time Measurements AGILENT 35670A Supplemental Operator’s Guide Setting Up the Transducer Parameters Specifying Trigger Parameters Setting Up Input RangeChoosing a Preliminary Frequency Span WAITING FOR CH 1 TRIGGER Setting Up Time DisplaysUsing Force/Response Windows Averaging Displaying Hammer Test ResultsAGILENT 35670A Supplemental Operator’s Guide Delay = 01.T ForceWidth = T ExponentialDecay = T Changing Frequency SpanAGILENT 35670A Supplemental Operator’s Guide Prepare the order results list as follows AGILENT 35670A Supplemental Operator’s GuideSection 13 Order Domain Results in List Mode Prepare the order display as followsTo start taking measurements AGILENT 35670A Supplemental Operator’s GuideSelecting Measurement Parameters Recalling the Spectra from Non-VolatileRAM Recalling the Spectra from DiskScaling the Displays Using Markers to Compare Selecting Measurement Parameters Setting Up the Waterfall DisplaySection 15 Waterfall Spectra at Time Intervals Selecting Single Channel OperationUsing Slice Markers with Waterfall Data Setting Up Time Step ArmAGILENT 35670A Supplemental Operator’s Guide Section 16 Waterfall Spectra at RPM Intervals Setting Up the TachometerSpecifying the Start RPM Scaling the Display Starting and Pausing a MeasurementAGILENT 35670A Supplemental Operator’s Guide Accelerometer Polarity AGILENT 35670A Supplemental Operator’s Guide Set up triggering on Channel 1 to 5% of rangeFor accelerometers with opposite polarity Set up the AGILENT 35670AAGILENT 35670A Supplemental Operator’s Guide For accelerometers with the same polarityAGILENT 35670A Supplemental Operator’s Guide Set up displaySet up trace coordinates as peak-to-peakmil AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Enter Channel 1 input parameters Preset the AGILENT 35670AAGILENT 35670A Supplemental Operator’s Guide Connect the transducersChoose measurement parameters Set up display parametersAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Viewing Results Using Real and Imaginary TracesAssessing Measurement Quality AGILENT 35670A Supplemental Operator’s Guide Preset the AGILENT 35670ASet up Trace B to measure velocity in inch/s 0-pk Press the XDCR UNIT CONVERT softkey F4 AGILENT 35670A Supplemental Operator’s GuidePress the Trace Coord hardkey Press the Y UNITS softkey F8AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide When the run-upand run-downis completedCharacterizing the External Trigger Specify User Levels for TriggeringSet up a non-TTLtrigger as follows Setting Up External TriggerAcquire and Display the Trigger Signal Characterize the Trigger SignalAGILENT 35670A Supplemental Operator’s Guide Set up measurement parametersSaving Trace to 3.5” Disk Confirming Contents of 3.5” Disk FileTo return to the Trace view Confirming Contents of NV-RAMSaving Trace to Non-VolatileRAM NV-RAM AGILENT 35670A Supplemental Operator’s GuideRecall Trace Data from Non-VolatileRAM NV-RAM Recall Trace From 3.5” DiskAGILENT 35670A Supplemental Operator’s Guide Section 24 Plotting and Printing Trace Data Generating Output with the AGILENT 35670APlotting the Display Plot the Trace Printing the DisplayAGILENT 35670A Supplemental Operator’s Guide Check the Plot/Print DestinationSection 25 Importing Plots into Microsoft Word Plot to a File Using the AGILENT 35670A Section 28 Precautions to Prevent Loss of Data Measuring Acceleration, Displaying Displacement Converting Frequency Response Units to Compliance Math Functions and XDCR UNIT CONVERTNow display the function F1 on Trace B AGILENT 35670A Supplemental Operator’s GuideAGILENT 35670A Supplemental Operator’s Guide above the track number AGILENT 35670A Supplemental Operator’s GuideSection Section