User Manual

350 Keysight InfiniiVision 1000 X-Series Oscilloscopes Programmer's Guide
20 :MEASure Commands
:MEASure:COUNter
(see page 782)
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 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><NL>
<source> ::= count in Hertz in NR3 format
See Also • "Introduction to :MEASure Commands" on page 345
• ":MEASure:SOURce" on page 371
• ":MEASure:FREQuency" on page 358
• ":MEASure:CLEar" on page 349
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.