:MEASure Commands
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Keysight InfiniiVision M9241/42/43A PXIe Oscilloscopes SCPI Programmer's Guide
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:MEASure:FFT:OBW
Command Syntax
:MEASure:FFT:OBW <percentage>[,<source>]
<percentage> ::= percent of spectral power occupied bandwidth is
measured for (in NR3 format)
<source> ::= {FUNCtion<m> | MATH<m> | FFT} (must be an FFT waveform)
<m> ::= 1 to (# math functions) in NR1 format
The :MEASure:FFT:OBW command installs an FFT analysis Occupied Bandwidth
measurement on screen.
Occupied Bandwidth measures the bandwidth (frequency range) containing some
percent (usually 99%) of the total spectral power. While 99% is the industry norm,
you can specify the percent you want to use in the measurement.
The center frequency used in the measurement is the one defined for the FFT
function, and the FFT span represents the total spectral power.
When this measurement is tracked with cursors, the cursors show the measured
bandwidth (frequency range).
Query Syntax
:MEASure:FFT:OBW? <percentage>[,<source>]
The :MEASure:FFT:OBW? query returns the measured Occupied Bandwidth value.
Return Format
<return_value><NL>
<return_value> ::= occupied bandwidth, Hz in NR3 format
See Also
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