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Study the Frequency Domain | |
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Let UltimaSerial unleash the power of your Windaq Starter kit!
Lessons on how to use UltimaSerial
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A very frequently requested application is to study the frequency domain of an analog signal. Although the serial devices from Dataq is too slow to analyze audio frequency (We do have an example on how to study frequency spectrum in real-time using UltimaSerial), I find their high-end products very useful. Unfortunately, they don't have a spectrogram add-in for their WinDaq software. So, based on the new features of their latest ActiveX control, a sample program WWB.VBP from their ActiveX package, and a shareware Spectrogram downloaded from the internet, I put together this fun project within an hour to show you how to view the frequency domain of an analog signal. You can even try to playback the converted sound file through your speaker!
This VB program has the following limitations:
To try this out, you need to:
When you are done with this, please go to my Home page to learn how to program Dataq's serial devices, including DI-194/190/150RS/151RS/195B, in VisualBASIC, Visual C++, LabView and Excel
Here are some screen shots: The original WinDaq file opened under WWB.
The first channel is extracted from the above Sample.Wdq and convert it to .WAV file (Sample.wav)
Sample.Wav file is studied by the Spectrogram:
Last update: 10/05/07 Copyright: 2000-2005 www.UltimaSerial.com
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