Stanford Research Systems SR780, Operating Manual And Programming Reference

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Window Menu 4-117
SR780 Network Signal Analyzer
Correlation Windows:
When the measurement is Auto Correlation, Cross Correlation, Windowed Time or a
User Function, the available windows are:
[-T/2..T/2]
This is a uniform window which should only be used on data which is self windowing
(lasts less than half of the time record).
[0..T/2]
This window zeroes the second half of the time record.
[-T/4..T/4]
This window zeroes the first and last quarter of the time record.
Octave and Swept Sine measurements do not use windows.
Force Length
Set the Force Window Length as a percentage of the FFT time record [1%..100%]. Points
in the time record up to the Force Length are unmodified. Points in the time record past
the Force Length are zeroed.
Choose Force as the FFT window before setting the Force Length.
The two displays can have different Force Lengths. This entry field can be linked to both
displays by using the [Link] key.
Command: FWFL (?) d {, i}
Expo TC
Set the Expo Window Time Constant as a percentage of the FFT time record
[5%..1000%]. This is the point where the window function reaches 1/e.
Choose Expo as the FFT window before setting the Expo Time Constant.
The two displays can have different Expo Time Constants. This entry field can be linked
to both displays by using the [Link] key.
Command: FWTC (?) d {, i}
Trace to Window
Copy a stored data trace (real part only) to the User window function of the active
display. Use the knob to pick a trace which already contains data and press [Enter]. The
window automatically switches to User window.