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Agilent Technologies Agilent 35670A manual Specify User Levels for Triggering

Models: Agilent 35670A

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Specify User Levels for Triggering

AGILENT 35670A

Supplemental Operator’s Guide

Section 21 : Using an External Trigger for Time Averaging

Use external triggering for synchronous averaging of linear spectra. With a reliable, consistent trigger, the resulting noise floor tends to be eliminated and the signal-to- noise ratio of the measurement can be optimal.

If the trigger is TTL, with little noise and jitter, then trigger setup is accomplished as follows:

•Press the [Trigger] hardkey.

•Select the [EXTERNAL TRIGGER] softkey (F2).

•Press the [TRIGGER SETUP] softkey (F6)

•Toggle the [EXT LEVEL USER TTL] softkey (F1) until TTL is

highlighted.

Other trigger parameters such as USER EXT LEVEL and EXT RANGE do not need to be specified when using a TTL trigger.

Specify User Levels for Triggering

When the external trigger is not a TTL signal, the trigger level, slope, and range can be specified to accommodate a broad range of external triggers. Successful triggering is easiest to obtain when the external trigger signal is well characterized. Trigger range, level, and slope must be determined.

Characterizing the External Trigger

External trigger pulses can be noisy and of an unknown shape and amplitude. Reliable use of an external trigger requires knowledge of trigger characteristics so that the AGILENT 35670A can be set up properly. This section provides guidance in capturing and analyzing trigger signals so that reliable external triggering is attained.

Connect the signal and preset the AGILENT 35670A

•Connect the external trigger signal to Channel 1.

•Turn on the AGILENT 35670A, or

•Press the green [Preset] hardkey

•Press the yellow [Pause/Cont] hardkey if desired.

Select the Histogram/Time measurement mode. This mode turns off the anti-alias filter so that the actual analog signal can be examined.

•Press the [HISTOGRAM / TIME] softkey (F6).

•Press the [Meas Data] hardkey.

• Press the [UNFILTERD TIME CH 1] softkey (F6).

•Press the [Scale] hardkey.

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

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Agilent Technologies Agilent 35670A manual Specify User Levels for Triggering, Characterizing the External Trigger

Contents

for the Agilent 35670A Dynamic Signal Analyzer Supplemental Operator’s GuideAGILENT 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 Inst Mode Meas DataTrac Coord Coord A FreqUsing Transducers with External Preamplifiers Using ICP-TypeTransducers with the AGILENT 35670ASection 3 Measuring with Transducers Specifying Transducer Sensitivity and Units Selecting Single Channel Operation Setting Up Transducer Units for DisplacementSelecting Frequency Span Frequency Spans Available for the AGILENT 35670A Quantifying Power Spectrum Results Maximizing Dynamic Range Frequency Zooming to Increase ResolutionSection 5 Improving Measurement Results Averaging to Reduce Measurement Variance AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Selecting Single Channel OperationSelecting Time Record Length Displaying Time WaveformsEvent Triggering Quantifying Time Trace Results Presetting the Analyzer Selecting Dual Channel OperationSection 7 Measuring Dual Channel Spectra Selecting Frequency SpanUsing Markers with Dual Channel Measurements Coupled Markers Coupled Markers with Peak TrackingDual Channel Averaging Maximizing Dynamic RangeAGILENT 35670A Supplemental Operator’s Guide Displaying Dual Time Waveforms Section 9 Measuring Dual Channel Time WaveformsSelecting Dual Channel Operation Selecting Time Record LengthArming Dual Channel Time Measurements Triggering a Dual-ChannelTime MeasurementTrigger Delay Using Markers with Dual Channel Time Measurements AGILENT 35670A Supplemental Operator’s Guide Setting Up the Transducer Parameters Choosing a Preliminary Frequency Span Setting Up Input RangeSpecifying Trigger Parameters Setting Up Time Displays WAITING FOR CH 1 TRIGGERUsing Force/Response Windows Displaying Hammer Test Results AveragingAGILENT 35670A Supplemental Operator’s Guide Changing Frequency Span Delay = 01.T ForceWidth = T ExponentialDecay = TAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Section 13 Order Domain Results in List ModePrepare the order display as follows Prepare the order results list as followsAGILENT 35670A Supplemental Operator’s Guide To start taking measurementsSelecting Measurement Parameters Recalling the Spectra from Disk Recalling the Spectra from Non-VolatileRAMScaling the Displays Using Markers to Compare Setting Up the Waterfall Display Section 15 Waterfall Spectra at Time IntervalsSelecting Single Channel Operation Selecting Measurement ParametersSetting Up Time Step Arm Using Slice Markers with Waterfall DataAGILENT 35670A Supplemental Operator’s Guide Specifying the Start RPM Setting Up the TachometerSection 16 Waterfall Spectra at RPM Intervals Starting and Pausing a Measurement Scaling the DisplayAGILENT 35670A Supplemental Operator’s Guide Accelerometer Polarity Set up triggering on Channel 1 to 5% of range AGILENT 35670A Supplemental Operator’s GuideSet up the AGILENT 35670A AGILENT 35670A Supplemental Operator’s GuideFor accelerometers with the same polarity For accelerometers with opposite polaritySet up trace coordinates as peak-to-peakmil Set up displayAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Preset the AGILENT 35670A AGILENT 35670A Supplemental Operator’s GuideConnect the transducers Enter Channel 1 input parametersAGILENT 35670A Supplemental Operator’s Guide Set up display parametersChoose measurement parameters AGILENT 35670A Supplemental Operator’s Guide Viewing Results Using Real and Imaginary Traces AGILENT 35670A Supplemental Operator’s GuideAssessing Measurement Quality Set up Trace B to measure velocity in inch/s 0-pk Preset the AGILENT 35670AAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide Press the Trace Coord hardkeyPress the Y UNITS softkey F8 Press the XDCR UNIT CONVERT softkey F4AGILENT 35670A Supplemental Operator’s Guide When the run-upand run-downis completed AGILENT 35670A Supplemental Operator’s GuideSpecify User Levels for Triggering Characterizing the External TriggerSetting Up External Trigger Acquire and Display the Trigger SignalCharacterize the Trigger Signal Set up a non-TTLtrigger as followsSet up measurement parameters AGILENT 35670A Supplemental Operator’s GuideConfirming Contents of 3.5” Disk File Saving Trace to 3.5” DiskConfirming Contents of NV-RAM Saving Trace to Non-VolatileRAM NV-RAMAGILENT 35670A Supplemental Operator’s Guide To return to the Trace viewRecall Trace From 3.5” Disk Recall Trace Data from Non-VolatileRAM NV-RAMAGILENT 35670A Supplemental Operator’s Guide Plotting the Display Generating Output with the AGILENT 35670ASection 24 Plotting and Printing Trace Data Printing the Display AGILENT 35670A Supplemental Operator’s GuideCheck 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 Math Functions and XDCR UNIT CONVERT Converting Frequency Response Units to ComplianceAGILENT 35670A Supplemental Operator’s Guide Now display the function F1 on Trace BAGILENT 35670A Supplemental Operator’s Guide AGILENT 35670A Supplemental Operator’s Guide above the track numberSection Section