Understanding Video Filtering

Dear Signal Hound,
Referring to the API manual, “The Video bandwidth is implemented as a simple rectangular window, averaging the amplitude readings for each frequency bin over several overlapping FFTs”, I wonder what are the differences between averaging methods used in Acquisition panel of Spike application and VBW filtering.
However, I searched through the comments and found out that API uses an IIR filter to implement the VBW filter. Generally speaking, How can I understand mathematics behind of VBW that it can get continuous values.
best regards

lsullivan,

When average detector is selected, the averaging algorithm is used, when min/max detector is selected the IIR filter is used.

If you are able to provide more information about your measurement, we can try to help you determine the best settings for the device.

Andrew

[Author]

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