Measurement Step 2: Select The Window - HP 3563A Operating Manual

Measurement Step
Windows are time domain functions that reduce the effects of leakage, the smearing of energy across
the frequency spectrum. Leakage is caused by signals that are not periodic in the time domain; the
FFT assumes all inputs are periodic. For more details about leakage and windowing, see
Hewlett-Packard Application Note 243.
The HP 3563A offers six windows: Hanning, flat top, uniform, force, exponential, and user-defined.
To select a window, press WINDOW. Also under the WIN DOW hardkey are these two softkeys:
LINES 801 and LINES 1 024. These soft keys allow you to take a measurement with 801 or 1024
frequency lines, respectively (see "Selecting a Window" in chapter 3 for details).
Note
Windows are available only in linear resolution and time capture modes. For
window descriptions and examples, see "Selecting a Window" in chapter 3.
2:
Select the Window
Using The Time Capture Mode
Measuring and Analyzing Captured Data
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