Tektronix MSO70804C Printable Help

There are eight different spectral analyzer windows:
■
Rectangular
■
Gaussian
■
Hamming
■
Blackman-Harris
■
Hanning
■
Flattop2
■
Kaiser-Bessel
■
Tek Exponential
Your choice of window function will depend on the input source characteristics that you want to observe and the characteristics of
the window function. The window characteristics are shown in the following table.
Window 3 dB BW in bins Scallop loss Nearest side lobe Zero phase
reference
Coefficients
Rectangular 0.89 3.96 dB -13 dB 50% 1.0
Hamming 1.3 1.78 dB -43 dB 50% 0.543478, 0.456522
Hanning 1.44 1.42 dB -32 dB 50% 0.5, 0.5
Kaiser-Bessel 1.72 1.02 dB -69 dB 50% 0.40243, 0.49804,
0.09831, 0.00122
Blackman-Harris 1.92 0.81 dB -92 dB 50% 0.35875, 0.48829,
0.14128, 0.01168
Gaussian 2.0 0.76 dB -79 dB 50% a = 3.75 (not cosine
series)
Flattop2 3.8 0.0065 dB -90 dB 50% 0.213348, -0.206985,
0.139512, -0.043084,
0.003745
Tek Exponential 1.42 0.60 dB -67 dB 20% not applicable
3 dB BW in bins
This is the bandwidth in units of bins, which are the intervals between spectral output samples when no zero fill is used. The
bandwidth is measured between the points on the lobe that are 3 dB down from the peak of the lobe. The bandwidth in hertz may
be computed by dividing the BW in bins by the gate duration in seconds. This is also referred to as resolution bandwidth (RBW).
Coherent gain
The gain factor normally associated with different window functions is correctly scaled into the magnitude spectrum output.
Therefore, the magnitudes in the output spectrum do not change as different windows are selected.
Oscilloscope reference
726 DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series

Tektronix MSO70804C Specifications

General

Brand	Tektronix
Model	MSO70804C
Category	Test Equipment
Language	English