Hello, The Short-Time Fourier Transform (STFT) allows you to analyze a signal in the time and frequency domain simultaneously, which allows you to better understand and process a signal. The STFT Spectogram.vi is available within the Signal Processing Toolset. For a better understanding of STFT or Joint Time Frequency Analysis (JTFA) take a look at the following knowledge bases:
http://zone.ni.com/devzone/conceptd.nsf/webmain/0A3D35A85FC7D2EA862568D2004A966F?opendocument http://zone.ni.com/devzone/conceptd.nsf/webmain/53EB764F16B52B1C862568F8004EEA84?opendocument The Signal Processing Toolset User Manual (http://digital.ni.com/manuals.nsf/websearch/C355A4DB4B3DFAE086256A6A006A9170?OpenDocument&node=132100_US) is also very helpful. Regards, Jyoti F National Instruments
