Tektronix TDS1000- Uživatelský manuál stáhnout pdf (Strana 133)

TDS1000/2000-Series Digital Oscilloscope User Manual

115

Math FFT

This chapter contains det ailed information on how to use the Math

FFT (Fast Fourier Transform). You can use the FFT Math mode to

convert a time-domain (YT) signal into its frequency components

(spectrum). You can use the Math FFT mode to view the following

types of signals:

H Analyze harmonics in power lines

H Measure harmonic conte nt and distortion in systems

H Characterize noise in DC power suppli es

H Test impulse re sponse of filters and systems

H Analyze vibration

To use the Math FFT mode, you need to perform the following tasks:

H Set up the source (time-domain) waveform

H Display the FFT spectrum

H Select a type of FFT window

H Adjust the sample rate to di splay the fundamental frequency and

harmonics without aliasing

H Use zoom controls to magnify th e spec trum

H Use cursors to measure the spectrum

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Tektronix TDS1000- Uživatelský manuál Strana 133