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Re: 485 super weak brightness control


 

Take a look at the posted pictures:
/g/TekScopes/album?id=262059
Latest 5 pictures for B sweep in 1ns/div to 20ns/div. As expected no change in B-gate from 1ns/div to 2ns/div, then B gate time increases. When B gate is more than 10ns/div, A gate also increases (as expected, A gate time >= B gate time).

Ozan


On Tue, Mar 23, 2021 at 09:27 AM, Ondrej Pavelka wrote:




Here is a odd thing I observing with B gate. Is this normal? Basically I
expect the pulse to be shortest at 1nS and gradually widen. What happens
here it basically goes in circles instead.
Looking at the width on your picture my B gate pulse width is correct at
1ns, corect at 2 and 5 but at 10ns us again the same length as 1nS and that
can't be right?
As far as I remember B-gate time stays the same from 1ns to 2ns (because of
the reason I mentioned before) then increases at 5ns. I will look at what
happens on my scope but I expect it should continue increasing.

Ozan

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