We recently compelted a project where we used a DAC to record audio with the Left and Right channels separately with a 20 dB gain applied to one of the channels. Our original plan was to use the DAC to play the data through the SCADAS using BNC inputs; one channel for the L and one for the R.
Unfortunately the data files ended at multiple hours in length due to issue when conducting our tests. Is there a method that we can import .WAV files to Test.Xpress as separate channels for the L and R to post process and analyze. The methodology works fine when we just play the files back through the SCADAS but would obviously take a long time to complete.
Solved! Go to Solution.
yes, You can import .wav file into Test.Xpress. Open a new or existing project, go to Analysis->Datasets, right click on Datasets-> Import...
now in the new popup menu as shown below:
To the right of the file name: choose "Windows Audio Files" now you should able import .wave file to Test.Xpress. If you have more questions, please let me know.
When I follow that procedure there is no option for "Windows Audio Files" and when I select "Data Files (all types)" .wav files still don't appear, even when I navigate to the correct folder.
Is there a setting I need to change to allow the import of the files?
Just a note, I am still running Test.Xpress 8A. Is this a new feature in the updated versions? a.k.a. do I need to upgrade?
Edit: Just upgrade to Test.Xpress 10. improting .wav option still doesn't show.
You'll need to install "LMS Active Pictures for data import" from the software DVD for TX8 & TX10.
Since I have Test.Lab installed on my PC, I do not need to install LMS Active Pictures for data import. I assume currently you do not have Test.Lab installed on this PC, right?
I started using LMS Test.lab, particularrely "POLYMAX modal analysis".
I have certain signals in a .mat files , and I need to applicate the polymax method on these signals.
The problem is that the tool Polymax modal analysis need a.xdf files, but I don't have the signals in this type of files.
So my question , is there any solution to import matlab files to LMS tEST.LAB and then applicate the polymax method to finally obtain the modal parameters?
Just be clear, which software are you using? LMS Test.Lab or Test.Xpress? .XDF file extension is associate with Test.Xpress; however, Test.Lab can read & import .xdf file and Mat.lab file; Test.Xpress can do the same as well.
The other question I have is the matlab file you have now. Is it time domain data or FRF? Usually customer use polymax modal analysis is to analyze FRF data (frequency domain) not time domain data? For example, in Test.Lab you browse to where this matlab file is at:
continue from previous reply....
go to Desktop->My computer->broswe to where the matlab file store->right click->replace input basket,
now you can go to Modal data selection workbook, make sure Input basket is selected, then click refresh function table or you might need to click Switch button to change the reference & respond matrix.
If the matlab file you have is time domain data, you'll not able to follow the procedure from above; Only FRF data works.
Good Afternoon friends!.
Well, I'm working with LMS Test.Xpress and have a question.
I using a recorded data in "g" units obtained from my measurement sensors, I'd like to convert the units of my recorded data to m/s2 and I'm looking for the manual and I know that the "Unit System", but the "Unit System" (into "tool pane") only work online (to configurate the transducter type to acquire the mesurements) but I want to convert the units of my offline data recorded. Here I show a figure about this.
I would be very gratefull for your helps.
Hello, to change the units of the measured data you need to turn on the Advanced Edit option. That will allow you change the Unit of your channel. Or you can make a copy of it using a Math channel and then change the unit of the new channel. See this option on the Datasets Properties?
To enable, you need to login to Test.Xpress as Administrator. Your local support team can provide the login if you do not know it. Type the login in the box shown below and hit return. If you do not login as Administrator you will not see this option.
After logging in as Adminstrator, you will see:
You can then see the Advanced Edit option under the Dataset Properties and turn it ON. You can then change the units of your channels or math channels.
Result after changing Unit from m/s^2 to g: