Filter
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897
BW
Filter BW
When using the Gaussian filters for certain types of applications it can be useful to be able to specify the
filter width using points other than the –3 dB points. The Filter BW function allows you to pick the filter
based on its –3 dB (Normal) bandwidth, its –6 dB bandwidth, its Noise bandwidth, or its Impulse
bandwidth.Note that in all four cases the –3 dB bandwidth is the same. The filter does not change, but the
way you specify it changes.
See “More Information” on page 897
More Information
The test set provides four ways of specifying the bandwidth of a Gaussian filter:
The –3 dB bandwidth of the filter
The –6 dB bandwidth of the filter
The equivalent Noise bandwidth of the filter, which is defined as the bandwidth of a rectangular filter
with the same peak gain which would pass the same power for noise signals.
The equivalent Impulse bandwidth of the filter, which is defined as the bandwidth of a rectangular filter
with the same peak gain which would pass the same power for impulsive (narrow pulsed) signals.
Readback Flattop
Initial S/W Revision Prior to A.02.00
Key Path
BW, RBW Control
Remote Command [:SENSe]:BANDwidth|BWIDth:TYPE DB3|DB6|IMPulse|NOISe
[:SENSe]:BANDwidth|BWIDth:TYPE?
Example BAND:TYPE NOIS
Notes DB3 = –3 dB (Normal)
DB6 = –6 dB
IMPulse = Impulse
NOISe = Noise
Dependencies Grayed out if the Flattop filter type is selected.
When
EMC Standard is set to CISPR or MIL, the Filter BW is chosen as
appropriate for the filter and the standard.
Preset Auto Couple chooses the preset value
State Saved Saved in State
Readback line 1-of-N selection
Initial S/W Revision Prior to A.02.00
Modified at S/W Revision A.02.00