HP HP 8753E, Руководство пользователя, Страница: 418 / 699

select a window, press A menu is presented that allows
the selection of three window types (see 6-12).
6-12. Impulse Width, Level, and Windowing Values
Window
Level Width (50%) Level (10 90%)
Minimum Span -21 Span
Normal Span -60 Span
-75 Span -70 1 Span
NOTE: The mode simulates an impulse impulse width is twice that of low pass
impulse width. The impulse levels are the same as low pass impulse levels.
Choose one of the three window shapes listed in 6-12. Or you can use the knob to select
any windowing pulse width (or rise time for a step stimulus) between the values. The
time domain stimulus levels depend only on the window selected.
is essentially no window. Consequently, it gives the highest
sidelobes.
(the preset mode) gives reduced sidelobes and is the mode
most often used.
. . . . .
window gives the minimum sidelobes, providing the
greatest dynamic range.
. .
(or
. . . . . . .
rise time) different from the standard window
values.
A window is activated only for viewing a time domain response, and does not affect a
displayed frequency domain response. Figure 6-72 shows the typical effects of windowing on
the time domain response of a short circuit reflection measurement.
Application and Operation Concepts 6-137