:MEASure:JSAMemory:DJ?
Query Syntax
:MEASure:JSAMemory:DJ?
Description
Queries the JSA DJ (rms) measurement, which is a band-limited Deterministic Jitter measurement. Specify the integration limits using the :CRECovery:JSANalysis:INTegrate:F command.
Requires an N1060A, N107x-series clock recovery module, or 86108A/B module with Option JSA. Jitter Spectrum Analysis and SW Clock Recovery Emulation .
Requires FlexDCA revision A.04.00 and above.
Example Command Sequence
:MEASure:CRECovery:DJ?
Measurement Ready?
To confirm that the measurement is ready to read, you can query the measurement's status:
if ('CORR' in Flex.query(':STATus?')):
measurement = Flex.query('?')
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 (:COUNt?). The technique uses the :COUNt? common measurement query. For example,
if (Flex.query(':COUNt?') >= Flex.query(':ACQuire:ECOUNt?')):
measurement = Flex.query('?')
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?.