EDM Analysis Step by Step

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4633 Old Ironsides Drive, Suite 304, Santa Clara, CA 95054, USA

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EDM Post Processing Step by Step Tutorial

This step by step tutorial demonstrates how to use the EDM software to post process time stream data that was

recorded with the CoCo hardware. The first part demonstrates the procedure for selecting a data record, applyinganalysis functions and processing the data. The second part demonstrates additional features such as exporting

processed data, changing the time range for processing, saving the processed data, and exporting the analysis profile.

The user needs to purchase the post processing functions in EDM. License Key has to be entered during the

installation process to enable the post processing functions.

Post Process Time Streams

1. The first step is to download a time stream signal from your CoCo or SD card to the EDMsoftware on the PC

2. After the data file is downloaded, right click on it and select view from the pop-up menu.

3. Next click the Analysis Tab. All the post processing features are located on the Analysis Tab.


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4. To start the analysis, we should create an analysis profile first. The profile saves all the analysissettings. This is useful if we want to perform the same analysis over and over again or use it at alater date. We can save the profile it in two ways. One way is to right click on the data file and

select Create Analysis Profile, the other is to press the Create button on the toolbar.

An Analysis Profile defines the required output signals and the analysis parameters for post

processing,.

5. The wizard launches. In this demonstration we will use the FFT Spectral Analysistemplate.Select this template and press the Next Button.


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6. Next, select the recoded time streamsas the input data source for the post processed signalanalysis. Click the Finish Button.

7. After the wizard is finished. two computed signals show up in the left panel and the DataConditioning and the Signals Tabs are shown. Right now the FFT and APS compute signals

shown in the Recording pan are empty because the data has not been processed yet.


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8. Select the Signals Tab. Since there is only 1 time signal in the file, we can only analyze it withan FFT and an APS. If we had more than two time signals in the file, we could do a CPS and FRF

analysis. The FFT(ch1) appears in the left panel when we enable the FFT analysis function.

After we enable the desired analysis functions, press the Analyze Buttonon the control panel.


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9. Now, the Block(ch1), APS(ch1), and FFT(ch1) are computed. Click on the View Tab.


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10.Select APS(ch1) in the Recordings pane. We can see the preview of ASP(ch1) on the bottomleft pane.

11.Next, drag the APS(ch1) and FFT(ch1) signals into the blank panes. Press the AnalyzeButtonon the control panel and we can see the APS(ch1) and FFT(ch1) signals are being

analyzed frame by frame.


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12.The recorded data is post processed using the settings in the analysis profile. You can change thesettings and then reanalyze the data. Click on Spectrum Averagingand change Linear toPeak/Hold. Then click on the Analyze Buttonagain to reprocess the data with the different

averaging setting.

This is a good time to go back and practice changing other analysis parameters and analyzing the

data before moving on to the next section.


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Additional Analysis Features

The previous section gave a quick demonstration of how to access the analysis features, select a

data recording and process the data. The following sections introduce more details of the EDM

Analysis functions including exporting the processed data, changing the time range for processing

saving the processed data and exporting the analysis profile.

13.Right click on one of the calculate signals. We can export the frame data to an Excel file or afile in other formats supported by EDM, such as ASCII, CSV, Matlab, TDM, UFF, and BUFF.


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14.We can also change the analysis range.Click on the Analysis Taband then the Signals Tabbelow.

Change the Analysis Rangeon the control panel. We can specify either the Start Time or Start

Point(the other one will be calculated automatically). Also enter the desired End Time or End

Point.

Press the AnalyzeButtonon the control panel and the APS(ch1), FFT(ch1), and Block(ch1) will

be calculated from the original time stream signal in this range.


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15.Press the Statistics Buttonon the Control Panel and EDM will show some information of theoriginal time stream signal such as sampling rate, duration and number of data points.


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16.Next press Setup on the ribbon. There are two tabs: one is for analysis speed control and theother is for Signal Save options. After signals are selected to save, we can press Saveon the

control panel to save the signal.


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17.We can save signals when a triggered event is captured when the Trigger Capturedis enabled inSave Signal Options. We need to setup the trigger conditions.

Click Trigger Setupon the control panel. The trigger source setup window will pop up for

trigger settings. Select the Trigger Source, conditions and levels and click the OK Button.


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18.The analysis profile can be used for other data files by exporting it. Right click on the analysisprofileto select Export Analysis Profileor press Exportto export it to a file so that you can

reuse it anther time.

When we would like to reuse the same analysis profile, just select another time stream signal on

the Recordings panel and press Importon the toolbar.

This concludes the EDM Analysis Step by Step Tutorial. After completing this tutorial you

should be able to select a recorded data file, post process it, change the processing settings, view

and save the processed data and save the analysis profile.

Documents

EDM Analysis Step by Step