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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> ::= 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.

Keysight Technologies InfiniiVision 3000T X Series User Manual

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