Technical data

282 Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide
16 :FUNCtion Commands
:FUNCtion[:FFT]:SPAN
(see page 790)
Command Syntax
:FUNCtion[: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 :FUNCtion[:FFT]:SPAN command sets the frequency span of the
display (left graticule to right graticule) when FFT (Fast Fourier
Transform) is selected.
Query Syntax
:FUNCtion[:FFT]:SPAN?
The :FUNCtion[: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 • "Introduction to :FUNCtion Commands" on page 278
• ":FUNCtion[:FFT]:CENTer" on page 281
• ":TIMebase:RANGe" on page 581
• ":TIMebase:SCALe" on page 583
NOTE
After a *RST (Reset) or :AUToscale command, the values returned by the
:FUNCtion[:FFT]:CENTer? and :FUNCtion:SPAN? queries depend on the current
:TIMebase:RANGe value. Once you change either the :FUNCtion[:FFT]:CENTer or
:FUNCtion:SPAN value, they no longer track the :TIMebase:RANGe value.