How often do you need to use a 5µs delayed and perfectly timed sweep in your everyday measurements? I can go for weeks without needing delayed sweep.
Forget about jitter, this is not the jitter that is the problem, it is the ADC clock which is the problem. Jitter is just a way this defective ADC clock manifests itself. There may be other problems caused by the bad clock that are not that apparent. Unless ADC clock is fixed, people will never know that the measurements they do with the scope are good or incorrect.
People reading this and related topics, whenever they see written "5uS jitter problem" should replace it in their head with "ADC clock problem", then see if that makes them less comfortable then it is now.
And another for instance: a frequency counter that when presented with 20.000MHz signal, reports it as 19.7MHz. This was what the beta f/w had my DS1054Z doing.
Now, after loading the latest firmware from Rigol, look at this EEVBLOG post to get it.
https://www.eevblog.com/forum/blog/eevblog-683-rigol-ds1000z-ds2000-oscilloscope-jitter-problems/msg578208/#msg578208I am pleased to say the 5uS jitter issue is history.
And the frequency counter shows 20.0002MHz
See the FFT power spectra of my DSO when fed a 20 MHz sine from the Rigol DG1022.
Before - with approx 70ns wide jitter at about 30 us delay.
And after updating with the latest f/w
(still has some spurs. Much, much better than the Chaos Clock but still could be improved, eh Bud?)
No more keyboard lockups too.