:MEASure:JITTer:OJITter:JRMS

Meas. mode:
Jitter
Package License:
L-RND
Waveform type:
PAM4
Flex Apps:
FlexDCA
EOJ Jrms Commands

Command Syntax

:MEASure:JITTer:OJITter:JRMS

Query Syntax

:MEASure:JITTer:OJITter:JRMS?

Description

Send this command to move the Jrms IEEE output jitter measurement results to the top of Jitter Mode's Output Jitter panel. Send the query form of this command to return the IEEE JRMS measurement result. The default returned measurement is based on all waveform edges. To return a measurement result that is based on one of twelve specific waveform edges, use the :MEASure:JITTer:OJITter:JRMS:ECATegory command.

Before the :MEASure:JITTer:OJITter:JRMS command can be used, you must turn on all IEEE measurements by sending the :MEASure:JITTer:OJITter:STATe command.

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:JITTer:OJITter:JRMS:

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

Child commands for measurement identification:

  • :MEASure:JITTer:OJITter:JRMS:SOURce

Requires FlexDCA revision A.05.70 and above.

Measurement Ready?

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

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

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:JITTer:OJITter:JRMS:COUNt?). The technique uses the :COUNt? common measurement query. For example,

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

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?.