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426 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide

20 :MEASure Commands

:MEASure:FREQuency

(see page 1138)

Command Syntax

:MEASure:FREQuency [<source>]

<source> ::= {<digital channels> | CHANnel<n> | FUNCtion | MATH

| WMEMory<r>}

<digital channels> ::= DIGital<d> for the MSO models

<n> ::= 1 to (# of analog channels) in NR1 format

<r> ::= 1-2 in NR1 format

<d> ::= 0 to (# digital channels - 1) 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> ::= frequency in Hertz in NR3 format

See Also • "Introduction to :MEASure Commands" on page 406

• ":MEASure:SOURce" on page 444

• ":MEASure:PERiod" on page 433

Example Code • "Example Code" on page 445

NOTE

This command is not available if the source is FFT (Fast Fourier Transform).

Agilent Technologies InfiniiVision 3000 X-Series Programmer's Guide

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