Agilent Technologies Signal Analyzer N9030a - Manual (Page 559)

6 RLC Swept SA Measurement Front-Panel & SCPI Reference
BW
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 key is greyed out and the readback
annotation on the key is blanked. This is because the Filter BW is chosen as appropriate for the
filter and the standard and not selected by this key.Any attempt to set it otherwise will give an
error.
Preset Auto Couple chooses the preset value
State Saved Saved in instrument state
Readback line 1-of-N selection
Initial S/W Revision Prior to A.02.00
Modified at S/W
Revision A.02.00
More Information
The analyzer provides four ways of specifying the bandwidth of a Gaussian filter:
1. The –3 dB bandwidth of the filter
2. The –6 dB bandwidth of the filter
3. 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.
4. 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.
The figure below shows the relationships of the various filter bandwidths for filters with the X-
Series’ shape factor (shape factor is defined as the ratio of the –60 dB bandwidth to the – 3 dB
bandwidth):
Remote Language Compatibility Measurement Application Reference 559