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Agilent Technologies Agilent 35670A Selecting Single Channel Operation, Selecting Frequency Span

Models: Agilent 35670A

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Selecting Single Channel Operation

AGILENT 35670A

Supplemental Operator’s Guide

Section 4 : Measuring a Single Channel Power Spectrum - Displacement

This section contains procedures for setting up and measuring a single channel power spectrum of displacement using an AGILENT 35670A Dynamic Signal Analyzer. Included are steps to select single channel operation, set up transducer parameters, frequency span, choose input range, select windowing, and turn on averaging in order to improve measurement accuracy. Instructions will also be presented to set up trace coordinates and trace scaling.

Selecting Single Channel Operation

Specify the single-channel instrument mode to measure one signal. However it should be noted that it is acceptable to measure a single channel in the default two- channel instrument mode and simply ignore the second channel. Nevertheless instructions will be given here to measure in single channel mode.

To measure a single-channel spectrum, turn on the AGILENT 35670A and then:

•Press the [Inst Mode] hardkey

•Press [CHANNELS 1 2 4 ] softkey (F7) until 1 is highlighted.

Setting Up Transducer Units for Displacement

To measure power spectrums using a displacement transducer with a sensitivity of

200 mV/mil, follow these steps:

•Press the [Input] hardkey.

•Enter 800 and then press the [Hz] softkey (F2).

Any frequency below 51.2 kHz may of course be entered, however the analyzer will select the lowest span that contains the desired frequency. For example, if 1200 Hz is entered, the analyzer is switched to a span of 1600 Hz.

Selecting Frequency Span

The default frequency span after turn-on is 51.2 kHz, which is usually too high for most transducer measurements. To reduce the span to 800 Hz, perform the following steps:

•Press the [Freq] hardkey.

•Enter 800 and then press the [Hz] softkey (F2).

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Agilent Technologies Agilent 35670A manual Selecting Single Channel Operation, Setting Up Transducer Units for Displacement

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 Meas Data Inst ModeTrac Coord Coord A FreqUsing ICP-TypeTransducers with the AGILENT 35670A Using Transducers with External PreamplifiersSection 3 Measuring with Transducers Specifying Transducer Sensitivity and Units Setting Up Transducer Units for Displacement Selecting Single Channel OperationSelecting Frequency Span Frequency Spans Available for the AGILENT 35670A Quantifying Power Spectrum Results Frequency Zooming to Increase Resolution Maximizing Dynamic RangeSection 5 Improving Measurement Results 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 Dual Channel Operation Presetting the AnalyzerSection 7 Measuring Dual Channel Spectra Selecting Frequency SpanUsing Markers with Dual Channel Measurements Coupled Markers with Peak Tracking Coupled MarkersMaximizing Dynamic Range Dual Channel AveragingAGILENT 35670A Supplemental Operator’s Guide Section 9 Measuring Dual Channel Time Waveforms Displaying Dual Time WaveformsSelecting Dual Channel Operation Selecting Time Record LengthTriggering 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 Setting Up Input Range Choosing a Preliminary Frequency SpanSpecifying Trigger Parameters 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 Section 13 Order Domain Results in List Mode AGILENT 35670A Supplemental Operator’s GuidePrepare the order display as follows Prepare the order results list 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 Section 15 Waterfall Spectra at Time Intervals Setting Up the Waterfall DisplaySelecting Single Channel Operation Selecting Measurement ParametersUsing Slice Markers with Waterfall Data Setting Up Time Step ArmAGILENT 35670A Supplemental Operator’s Guide Setting Up the Tachometer Specifying the Start RPMSection 16 Waterfall Spectra at RPM Intervals 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 rangeAGILENT 35670A Supplemental Operator’s Guide Set up the AGILENT 35670AFor accelerometers with the same polarity For accelerometers with opposite polaritySet up display Set up trace coordinates as peak-to-peakmilAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Preset the AGILENT 35670AConnect the transducers Enter Channel 1 input parametersSet up display parameters AGILENT 35670A Supplemental Operator’s GuideChoose measurement parameters AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Viewing Results Using Real and Imaginary TracesAssessing Measurement Quality Preset the AGILENT 35670A Set up Trace B to measure velocity in inch/s 0-pkAGILENT 35670A Supplemental Operator’s Guide Press the Trace Coord hardkey AGILENT 35670A Supplemental Operator’s GuidePress the Y UNITS softkey F8 Press the XDCR UNIT CONVERT softkey F4AGILENT 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 TriggeringAcquire and Display the Trigger Signal Setting Up External TriggerCharacterize the Trigger Signal Set up a non-TTLtrigger as followsAGILENT 35670A Supplemental Operator’s Guide Set up measurement parametersSaving Trace to 3.5” Disk Confirming Contents of 3.5” Disk FileSaving Trace to Non-VolatileRAM NV-RAM Confirming Contents of NV-RAMAGILENT 35670A Supplemental Operator’s Guide To return to the Trace viewRecall Trace Data from Non-VolatileRAM NV-RAM Recall Trace From 3.5” DiskAGILENT 35670A Supplemental Operator’s Guide Generating Output with the AGILENT 35670A Plotting the DisplaySection 24 Plotting and Printing Trace Data AGILENT 35670A Supplemental Operator’s Guide Printing the DisplayCheck the Plot/Print Destination Plot the TraceSection 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