User manual

Operator's Manual
58 WA1K2K-OM-E RevB
Window
Type
Description
Test Content
Rectangular
Best frequency resolution,
worst magnitude
resolution. This is
essentially the same as no
window.
Symmetric transients or
bursts. Equal-amplitude sine
waves with fixed frequencies.
Broadband random noise with
a relatively slowly varying
spectrum.
Hanning
Better frequency, worse
magnitude accuracy than
Rectangular.
Sine, periodic, and narrow-
band random noise.
Asymmetric transients or
bursts.
Hamming
Better frequency, worse
magnitude accuracy than
Rectangular. Hamming has
slightly better frequency
resolution than Hanning.
Sine, periodic, and narrow-
band random noise.
Asymmetric transients or
bursts.
Blackman
Best magnitude, worst
frequency resolution.
Single frequency waveforms to
find higher order harmonics.
2. Press the FFT Zoom option button and select from 1X, 2X, 5X, and
10X choices.
3. Use the Scale option button to choose either dBVrms or Vrms
appropriately for your FFT trace.