:MEASure:OSCilloscope:JITTer

Meas. mode:
Scope
Package License:
L-RND
L-MFG
Waveform type:
NRZ
PAM4
Flex Apps:
FlexDCA
FlexRT
Jitter Commands

Command Syntax

Waveform type:
NRZ
Pulse
:MEASure:OSCilloscope:JITTer

Query Syntax

:MEASure:OSCilloscope:JITTer?

Description

Moves the NRZ jitter measurement to the top of the Results table. Displays the measurement if it is not already shown on the table. The query form of the command returns the measured value. Jitter is a measurement of the time variances of the rising or falling edges of a pulse waveform at the middle threshold. Use the FORMat child command to select Jitterrms or Jitterp-p (peak-to-peak). Sources can be any displayed waveform, waveform memory, or function. For example, CHAN1A, WMEMory1, or FUNCtion1. Use :MEASure:TBASe:METHod to change the definition of the waveform's top/base. Use :MEASure:THReshold:METHod to change the definition of the waveform's threshold.

The Jitterp-p and Jitterrms measurements can not be made on a measurement region.

Measurement Identification

Avoid subtle programming errors! To ensure that the correct measurement is installed or queried, always explicitly identify a measurement when installing a measurement or querying a measured value, status, or detail. To identify a measurement, specify the measurement's source waveform (:SOURce child command). With some measurements, you may also need to specify other identifying values. Generally, when selecting a measurement using FlexDCA's GUI, if a dialog appears prompting you to select values, you should explicitly specify these values when remotely identifying the measurement. More information.

For example, to return the status of the measurement, :MEASure:OSCilloscope:JITTer:

flex.write(':MEASure:OSCilloscope:JITTer:SOURce CHAN1A')
if flex.query(':MEASure:OSCilloscope:JITTer:STATus?') == 'CORR';
    measurement = flex.query(':MEASure:OSCilloscope:JITTer?')
else:
	details = flex.query(':MEASure:OSCilloscope:JITTer:STATus:DETails?')
	reason = flex.query(':MEASure:OSCilloscope:JITTer:STATus:REASon?')

Child commands for measurement identification:

  • :MEASure:OSCilloscope:JITTer:SOURce
  • :MEASure:OSCilloscope:JITTer:FORMat

Example Command Sequence

:SYSTem:MODE OSCilloscope
:MEASure:OSCilloscope:JITTer:SOURce CHAN1A
:MEASure:OSCilloscope:JITTer:DJFormat PP
:MEASure:OSCilloscope:JITTer
:MEASure:OSCilloscope:JITTer?

Measurement Ready?

To confirm that the measurement is ready to read, you can query the measurement's status:

if ('CORR' in Flex.query(':MEASure:OSCilloscope:JITTer:STATus?')):
	measurement = Flex.query(':MEASure:OSCilloscope:JITTer?')

If averaging is turned on (:ACQuire:AVERaging), you can also confirm if the measurement result is ready by comparing the number of specified averages (:ACQuire:ECOunt?) versus the number of measurement sweeps that have occurred (:MEASure:OSCilloscope:JITTer:COUNt?). The technique uses the :COUNt? common measurement query. For example,

if (Flex.query(':MEASure:OSCilloscope:JITTer:COUNt?') >= Flex.query(':ACQuire:ECOUNt?')):
	measurement = Flex.query(':MEASure:OSCilloscope:JITTer?')

You can also use an acquisition limit lest to test that a number of waveform samples, or pattern acquisitions have completed before returning a measurement. Refer to the :LTESt:ACQuire:CTYPe command.

Common Measurement Child Queries

This command supports the use of the following common measurement queries: :LOCation?, :COUNt?, :MAXimum?, :MINimum?, :MEAN?, and :SDEViation?.