Hello
Below are some screen shots. On the fourth you can see the problem.
The bug is related to a wrong setted delay for the PRETRIGGER and the settings of the POSTTRIGGER in
LONG MEM mode.
I ask anyone who have a SDS1102CML or SDS1102CML+ to reproduce my simple test and post the result.
Here are the steps:
Set the DSO trigger option to NORMAL, the time base to 100us, the memory depth to NORMAL (short) and
1.)apply to channel one the 1kHz test signal from the DSO
on the screen will apare fig1.
2.) push the SINGLE button on the DSO; after a short time will apare fig2 (with the RUN/STOP button litting red)
3.) push again the SINGLE button and select the memory depth LongMem; now you will see fig3.
Untill this momemnt everything is ok
4.) Push the SINGLE button and it will apare fig4. or something else , more confuseing
On my fourth screenshot(fig4) it is obvious that in the PRETRIGGER zone (left to the middle of the screen) are to few good samples,
most of them are leftovers form a previus acquisition, or worse , some unknown memory content.
Once I got a WAVEFORM in wich were all the content of the DSO's flash memmory.
This problem is since i bought the DSO many years ago.
I'm not convinced about that the problem is solved in the newer DSOs.
That's why I ask to make the test on any CML or CML+
The bug is present on LECROY WAVEACE to.