480 Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide
22 :MEASure Commands
:MEASure:FREQuency
(see page 1276)
Command Syntax
:MEASure:FREQuency [<source>]
<source> ::= {<digital channels> | CHANnel<n> | FUNCtion<m> | MATH<m>
| WMEMory<r>}
<digital channels> ::= DIGital<d> for the MSO models
<d> ::= 0 to (# digital channels - 1) in NR1 format
<n> ::= 1 to (# of analog channels) in NR1 format
<m> ::= 1 to (# math functions) in NR1 format
<r> ::= 1 to (# ref waveforms) in NR1 format
The :MEASure:FREQuency command installs a screen measurement and starts a
frequency measurement. If the optional source parameter is specified, the current
source is modified.
IF the edge on the screen closest to the trigger reference is rising:
THEN frequency = 1/(time at trailing rising edge - time at leading rising edge)
ELSE frequency = 1/(time at trailing falling edge - time at leading falling edge)
Query Syntax
:MEASure:FREQuency? [<source>]
The :MEASure:FREQuency? query measures and outputs the frequency of the
cycle on the screen closest to the trigger reference.
Return Format
<source><NL>
<source> ::= frequency in Hertz in NR3 format
See Also • "Introduction to :MEASure Commands" on page 458
• ":MEASure:SOURce" on page 499
• ":MEASure:PERiod" on page 488
Example Code • "Example Code" on page 500
This command is not available if the source is FFT (Fast Fourier Transform).
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