GW Instek GDS-3000 Series User Manual - Manual (Page 83)

MEASUREMENT
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Hamming FFT
Window Frequency resolution Good
Amplitude resolution Not good
Suitable for.... Frequency measurement on
periodic waveforms
Rectangular FFT
Window Frequency resolution Very good
Amplitude resolution Bad
Suitable for.... Single-shot phenomenon
(this mode is the same as
having no window at all)
Blackman FFT
Window Frequency resolution Bad
Amplitude resolution Very good
Suitable for.... Amplitude measurement on
periodic waveforms
Addition/Subtraction/Multiplication/Division
Panel Operation 1. Press the Math key.
M
2. Press the Math key on the lower
bezel.
3. Select Source 1 from the side menu
Range CH1~4, Ref~4
4. Press Operator to choose the math
operation.
Range +, -, Ч, ч