Boy, that's much better but the amount of jitter in that oscillator is unbelievable.
Interestingly enough, the square wave (jitter only arises in square wave signals) jitter specs are competitive with if not entirely better than any of the lower spec (but much higher price) signal generators from HP, Rigol, and Siglent
Facts and fictions are not often equal. Do you have any data behind your claim or is just trumpth instead of truth.
Manufacturer is perhaps not interest about facts (ref. published some kind of details/specs) but if any other have facts, please do not hide facts.
Where I can find manufacturer published FY6600 jitter specifications based to reliable measurements for Square wave (or what ever wave) or even somehow trusted third party measured data.
Example Siglent low end SDG1000X series:'
Square wave and Pulse
Max (aka worst case)
Jitter (
rms), Cycle to cycle 300 ps + 0.05 ppm of period
In this image just one real measurement for simple example. (freq selected so that it is not any "golden" freq related to reference and/or sampling rate (what is 150MSa/s in SDG1000X)
Of course Arb have cycle-cycle peak peak jitter 6.7ns (1000/150) excluding some "golden" special frequencies. Also triangle wave have this jitter. This is more (worse) than 4ns what is sampling period based jitter in FY6600 (what is FY6600 real total cycle-cycle jitter is unknown least for me without any real trusted measured data)
Note that in example image have sum of all errors, not only generator. With this level of jitter there come also oscilloscope trigger jitter, noise and timebase jitter must be taken into account. Only what can say is that SDG jitter is unknown amount less than total jitter displayed in image.