Math setups Spectral analysis features
FFT windows
The instrument allows you to match the optimum window to the signal you are a nalyzing.
The Rectangular window is best for nonperiodic events such as transients, pulses, and single-sequence
acquisitions.
The Hamming, Hanning, and Blackman-Harris windows are better for periodic signals.
The Kaiser Bessel window has less spectral leakage than the Hanning, Hamming, or Rectangular
windows.
The Gaussian window provides optimal localization in both the time and frequency domain.
The Flatto
p2 window is good for high accuracy magnitude measurements for signals that do not
require narrow resolution bandwidth.
The Tek Ex
ponential window is useful for impulse response testing.
Vertical scales
The FFT vertical graticule can be set to either dB or Linear RMS.
AdBsca
le is useful when the frequency component magnitudes cover a wide dynamic range, letting
you show both lesser and greater magnitude frequency components on the same display.
ALine
ar scale is useful when the frequency component magnitudes are all close in value, enabling
direct comparison of the ir magnitudes.
Spectral and Time-Domain displays
Time signals and FFT waveforms can be shown together on the display. The time signal highlights the
problem; the FFT waveform helps you determine the cause of the problem.
DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series 251
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