HP 8753E User Manual page 418

the selection of three window types (see 'lhble 6-12).
Window
Minimum
Normal
NOTE: The bandpass mode simulates an impulse stimuli. Bandpass impulse width is twice that of low pass
impulse width. The bendpass impulse sidelobe levels are the same as low pass impulse sidelobe levels.
Choose one of the three window shapes listed in Table 6-12. Or you can use the knob to select
any windowing pulse width (or rise time for a step stimulus) between the softkey values. The
time domain stimulus sidelobe levels depend only on the window selected.
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.
Level Width (50%)
-75 dB
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.
rise time) different from the standard window values.
Level (10 - 90%)
-21 dJ3
-60 dB
-70 dB 1 AS/Freq Span
Application and Operation Concepts 6-137