Keysight P9241, Scpi Programmer'S Manual

Page: 439 / 1344

:MEASure Commands
21
Keysight P9241/42/43A Oscilloscopes SCPI Programmer's Guide 439
:MEASure:COUNter
(see page 1196 )
Command Syntax
:MEASure:COUNter [<source>]
<source> ::= {CHANnel<n> | EXTernal}
<n> ::= 1 to (# analog channels) in NR1 format
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 or Reference Waveforms may be
selected for the source.
The counter measurement counts trigger level crossings within a certain amount
of time (gate time) and displays the results in Hz.
The gate time is the horizontal range of the oscilloscope but is limited to >= 0.1 s
and <= 10 s. Unlike other measurements, the Zoom horizontal timebase window
does not gate the Counter measurement.
The Counter measurement can measure frequencies up to the bandwidth of the
oscilloscope. The minimum frequency supported is 2.0 / gateTime.
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><NL>
<source> ::= count in Hertz in NR3 format
See Also • "Introduction to :MEASure Commands" on page 432
• ":MEASure:SOURce" on page 472
• ":MEASure:FREQuency" on page 452
• ":MEASure:CLEar" on page 438
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.