Keysight Technologies InfiniiVision MSO-X 4154A

402 Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
18 :FUNCtion<m> Commands
:FUNCtion<m>[:FFT]:CENTer
(see page 1428)
Command Syntax
:FUNCtion<m>[:FFT]:CENTer <frequency>
<m> ::= 1 to (# math functions) in NR1 format
<frequency> ::= the current center frequency in NR3 format. The range
of legal values is from -25 GHz to 25 GHz.
The :FUNCtion<m>[:FFT]:CENTer command sets the center frequency when FFT
(Fast Fourier Transform) is selected.
Query Syntax
:FUNCtion<m>[:FFT]:CENTer?
The :FUNCtion<m>[:FFT]:CENTer? query returns the current center frequency in
Hertz.
Return Format
<frequency><NL>
<frequency> ::= the current center frequency in NR3 format. The range
of legal values is from -25 GHz to 25 GHz.
See Also • "Introduction to :FUNCtion<m> Commands" on page 393
• ":FUNCtion<m>[:FFT]:SPAN" on page 407
• ":TIMebase:RANGe" on page 1129
• ":TIMebase:SCALe" on page 1133
NOTE
After a *RST (Reset) or :AUToscale command, the values returned by the
:FUNCtion<m>[:FFT]:CENTer? and :FUNCtion<m>:SPAN? queries depend on the current
:TIMebase:RANGe value. Once you change either the :FUNCtion<m>[:FFT]:CENTer or
:FUNCtion<m>:SPAN value, they no longer track the :TIMebase:RANGe value.