:MEASure:JITTer:DEFine:RJComp

Command Syntax

:MEASure:JITTer:DEFine:RJComp{? {ON | OFF | 1 | 0}

Query Response

{1 | 0}

Description

Turns on RJ compensation which removes intrinsic oscilloscope jitter from the measurement results. Use the :MEASure:DEFine:RJCValue command to enter the actual correction value. Every jitter measurement, whether performed on a scope, TIA, or BERT, includes a component of jitter that has been generated by the measurement instrument itself. This is often referred to as intrinsic jitter. The RJ result is an RSS sum of RJ from the instrument and Device Under Test (DUT):

RJ²_meas = RJ²_DUT + RJ²_{meas system}

To determine the intrinsic RJ from your measurement system, measure the jitter of a source that is known to have extremely low phase noise, such as an Keysight E8267D PSG Analog Signal Generator. Alternatively, if you are using a BERT or pattern generator to drive the DUT, connect the BERT or pattern generator directly to the N1000A and measure jitter using a PRBS7 or 1010 pattern. The measured RJ is the intrinsic RJ of your measurement system. Enter this value and this random jitter contribution will be RSS'd out of the results.

For the N1000A DCA-X, intrinsic oscilloscope jitter is dependent on clock edge speed and rate.

N1000A Intrinsic Jitter at 10Gb/s

Source	Intrinsic Jitter
Standard Timebase	750 fs
86107A Precision Timebase Module	90 fs (approximate)
86108A Precision Waveform Analyzer	50 fs