Tektronix CSA7404B User Manual page 260

Creating and Using Math Waveforms
3- 192
H Perform fine adjustment using the front-panel trigger level control
H Adjust the front-panel HORIZONTAL POSITION control
Using windows to filter. There are eight different spectral analyzer windows:
H Rectangular
H Hamming
H Hanning
H Kaiser- -Bessel
H Gaussian
H Blackman- -Harris
H Flattop2
H TekExponential
In the time domain a window is a bell-shaped function equal in length to the gate
duration. For most windows this function tapers to zero at both ends of the gate
region. Before computation of the spectral transform, the window is multiplied,
sample by sample, times the input data in the gate region. The window function
affects the shape of the spectral analyzer response in the frequency domain. The
window functions affect the ability to resolve frequency in the output spectrum
and can affect the accuracy of the magnitude and phase measurements.
Figure 3- -53 shows how the time domain record is processed.
CSA7000B Series & TDS7000B Series Instruments User Manual