User`s guide

Remarks
The <filter> parameter takes on one of three discrete values: 3, 20, or
200. However, you can enter the lowest expected frequency that you
intend to encounter, and the command will automatically enter the
appropriate value for <filter>. For example, if you enter 15 Hz, the slow
filter (3 Hz) is selected. If you enter 190 Hz, the medium filter (20 Hz) is
selected to provide the appropriate low cutoff.
Set the lowest frequency that you expect to encounter. However, note that
lower bandwidths result in longer settling delays. The following table shows
the settling delays for the three bandwidths:
Input Frequency
Default Settling
Delay
3 Hz - 300 kHz
(Slow)
2.5
seconds/reading
20 Hz - 300 kHz
(Medium)
0.625
second/reading
200 Hz - 300 kHz
(Fast)
0.025
second/reading
The CONFigure and MEASure? commands automatically select the default
20 Hz (medium) filter.
The instrument selects the default 20 Hz (medium) filter after a Factory
Reset (*RST command) or an Instrument Preset (SYSTem:PRESet
command).