I think i found a bug,
my siglent SPD3303X got odd random time delay between analog channels and logic analyzer.
or ? am i doing something wrong here ?
or is this really how it is supposed to be ?
see this video:
https://youtu.be/WzokRBxDM-gPS: i am using my own logic analyzer input pcb, but as you see now with my latest speed trimmed resistor values
the digital to digital channels are perfectly fine, with in 2nS jitter = normal = the time resolution for LA.
This should be very easy to recreate, 25MHz 5V signal
also the attached picture : it shows the digital inputs are 16.6nS ahead of analog channels,
and on this ahead time, there is a lot of jitter, any one else seen this ?
UPDATE : Ahead time is a DESKEW adjustment in the digital menu.. NOT A PROBLEM, a cool feature for cable length compensation.
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UPDATE : I was doing something wrong ! use the AWG (Advanced Waveform Generator) as clock source to your electronics,
completely removes the kind of jitter mentioned in this video.
All clock sources, Digital, Analog, AWG are delivered from the SAME internal master clock,
and by running your circuit of the AWG, your circuit is not free running.