Hi everyone,
I'm a French newone on that forum and I would have been glad to introduced myself on the forum, but I haven't found where. So I do it on that thread.
I'm a former electronic & TCM ingenier long years ago but I still work on electronic devices (vintage audio, ham radio, laser biological applications ... and lot of other stuff I generally design by myself).
So, recently, I've experienced a tricky issue on my Fluke PM3394B 4 channels combiscope (full options equiped)
I'm using that outstanding device from more than ten years without any problem.
Description of the issue :
Until MTB is not less than 250ns/div, everything is ok.
But below (so from 200ns to 2ns), the sampling rate appears to be much too slow.
On the trace, sampling dots can be clearly seen ...
In addition, when a signal is active and the input mode is toggled to ground, it takes a lot of time for the trace to return to the ground state. It comes to that state dot after dot...
At the 2ns MTB setting, it needs more than 5s for the display to stabilize at a ground level.
Of course, below 250ns/div, no single event can be displayed, for the same reason.
Question : do you experience such a behavior or is it a scope issue ?
To be noticed :
- I'm sure every parameter has the right setting.
- everything is nominal in analog mode.
Many thanks for any advice.
All the best.
Philippe