Keysight Technologies InfiniiVision 3000T X Series - :FFT:SPAN

358 Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide
17 :FFT Commands
:FFT:SPAN
(see page 1276)
Command Syntax
:FFT:SPAN <span>
<span> ::= the current frequency span in NR3 format. Legal values are
1 Hz to 100 GHz.
If you set the frequency span to a value outside of the legal range, the
step size is automatically set to the nearest legal value.
The :FFT:SPAN command sets the frequency span of the display (left graticule to
right graticule) when FFT (Fast Fourier Transform) is selected.
Query Syntax
:FFT:SPAN?
The :FFT:SPAN? query returns the current frequency span in Hertz.
Return Format
<span><NL>
<span> ::= the current frequency span in NR3 format. Legal values are 1
Hz to 100 GHz.
See Also • ":FFT:AVERage:COUNt" on page 347
• ":FFT:CENTer" on page 348
• ":FFT:CLEar" on page 349
• ":FFT:DISPlay" on page 350
• ":FFT:DMODe" on page 351
• ":FFT:OFFSet" on page 353
• ":FFT:RANGe" on page 354
• ":FFT:REFerence" on page 355
• ":FFT:SCALe" on page 356
• ":FFT:SOURce1" on page 357
• ":FFT:STARt" on page 359
• ":FFT:STOP" on page 360
• ":FFT:VTYPe" on page 361
• ":FFT:WINDow" on page 362
NOTE
After a *RST (Reset) or :AUToscale command, the values returned by the :FFT:CENTer? and
:FFT:SPAN? queries depend on the current :TIMebase:RANGe value. Once you change either
the :FFT:CENTer or :FFT:SPAN value, they no longer track the :TIMebase:RANGe value.