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Commands by Subsystem 5

Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide 275

:MEASure:COUNter

(see page 658)

Command Syntax

:MEASure:COUNter [<source>]

<source> ::= {CHANnel<n> | EXTernal}

<n>::={1|2|3|4}forthefour channel oscilloscope models

<n> ::= {1 | 2} for the two channel oscilloscope models

The :MEASure:COUNter command installs a screen measurement and

starts a counter measurement. If the optional source parameter is

specified, the current source is modified. Any channel except Math may be

selected for the source.

The counter measurement counts trigger level crossings at the selected

trigger slope and displays the results in Hz. The gate time for the

measurement is automatically adjusted to be 100 ms or twice the current

time window, whichever is longer, up to 1 second. The counter

measurement can measure frequencies up to 125 MHz. The minimum

frequency supported is 1/(2 X gate time).

The Y cursor shows the the edge threshold level used in the measurement.

Only one counter measurement may be displayed at a time.

Query Syntax

:MEASure:COUNter? [<source>]

The :MEASure:COUNter? query measures and outputs the counter

frequency of the specified source.

Return Format

<source> ::= count in Hertz in NR3 format

See Also • "Introduction to :MEASure Commands" on page 272

• ":MEASure:SOURce" on page 297

• ":MEASure:FREQuency" on page 283

• ":MEASure:CLEar" on page 274

NOTE

This command is not available if the source is MATH.

NOTE

The :MEASure:COUNter? query times out if the counter measurement is installed on the

front panel. Use :MEASure:CLEar to remove the front-panel measurement before executing

the :MEASure:COUNter? query.

Agilent Technologies InfiniiVision 5000 Series Programmer's Guide

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