Agilent Technologies 8753ET User Manual page 216

Making Time Domain Measurements
Windowing
Table 3-3 Impulse Width, Sidelobe Level, and Windowing Values
Window Type Impulse Sidelobe
Minimum
Normal
Maximum
NOTE: The bandpass mode simulates an impulse stimulus. Bandpass impulse width is twice that of low pass
impulse width. The bandpass impulse sidelobe levels are the same as low pass impulse sidelobe levels.
Choose one of the three window shapes listed or 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.
MINIMUM
NORMAL
MAXIMUM
USE MEMORY on OFF
A window is activated only for viewing a time domain response, and does not affect a displayed frequency
domain response. Figure 3-23
short circuit reflection measurement.
3-28
Low Pass Impulse
Level Width (50%)
13 dB
0.60/Freq Span
44 dB
0.98/Freq Span
75 dB
1.39/Freq Span
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.
remembers a user-specified window pulse width (or step rise time)
different from the standard window values.
shows the typical effects of windowing on the time domain response of a
Step Sidelobe Step Rise Time (10
 90%)
Level
21 dB
0.45/Freq Span
60 dB
0.99/Freq Span
70 dB
1.48/Freq Span