On Tue, Sep 17, 2019 at 12:43 AM, Reginald Beardsley wrote:
OK Reg, but I still can't understand how this would work.
I suppose each trigger event results in a sample. At each trigger event the position on the ramp advances 1.1 ns when compared to the previous trigger event. Over 1024 events this advances the position over about 1.1 us. Meanwhile there is also a total advance of 10 ps in the position of the sampling event due to the increases of delay between sample and trigger event; but 20 ps is negligible compared to 1.1 us. So I expect you can see only 1/9 fraction of the total ramp, which would also run vertically.
In my own experiment I found about 10 ns difference between required periods.
[BTW w.r.t. sweep jitter: this is not related to the blinking light at the sampling head, what has been recognized as cause of slight sweep jitter?]