Kevin,
This looks like it might be a trace blanking problem. The beam is supposed to be turned off while being re-positioned to the left of the screen, but it looks like it is staying on. The retrace is faster than the intentional sweep, so it appears dimmer.
Looking at a triangle or sine waveform might give you a better idea of what is happening.
--John Gord
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On Wed, Feb 14, 2024 at 06:09 PM, <kevin.thome@...> wrote:
Hello,
This is my first post here.
I have a 465B that displays something strange when I probe the test
calibrator. The top pulses are connected with a weaker horizontal line in
between the actual top horizontal line of the pulses, but that does not happen
on the bottom. If I flip the slope switch on the trigger, then that inverts to
having the continuous horizontal line on the bottom instead, but not the top.
It seems to happen when I probe the calibrator on my other scope with my 465B
as well.
It also happens with two different probes, a P6105 and one of those cheapo
"TP6100"s.
I am wondering if anyone might have any thoughts on what may be the cause of
that? Or could it be user error of some sort? I am just getting back into
electornics as a hobby so I am quite rusty.
A photo of the issue can be found here:
/g/TekScopes/album?id=293027
Thank you for your time and consideration,
-Kevin
