:FUNCtion<m> Commands 18
Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide 379
:FUNCtion<m>:FFT:FREQuency:STARt
(see page 1276)
Command Syntax
:FUNCtion<m>:FFT:FREQuency:STARt <frequency>
<m> ::= 1 to (# math functions) in NR1 format
<frequency> ::= the start frequency in NR3 format.
The :FUNCtion<m>:FFT:FREQuency:STARt command sets the start frequency in
the FFT (Fast Fourier Transform) math function's displayed range.
The FFT (Fast Fourier Transform) math function's displayed range can also be set
with the :FUNCtion<m>[:FFT]:CENTer and :FUNCtion<m>[:FFT]:SPAN commands.
Query Syntax
:FUNCtion<m>:FFT:FREQuency:STARt?
The :FUNCtion<m>:FFT:FREQuency:STARt? query returns the current start
frequency in Hertz.
Return Format
<frequency><NL>
<frequency> ::= the start frequency in NR3 format.
See Also • ":FUNCtion<m>:FFT:FREQuency:STOP" on page 380
• ":FUNCtion<m>[:FFT]:CENTer" on page 378
• ":FUNCtion<m>[:FFT]:SPAN" on page 381