Thank you for reply me! I remember that when i buy the Picoscope, i have checked it and both of the channels got the 0V level very well. They displayed coincidentally very well, but i have gone wrong at channel B recently.
1/ I did both ways. The frist, I connect 2 ground clips at the same position 0V in the PCB ( I want to measure the scope at two positions in this board), but the result when i did not touch the pins of the two to anything was like the file i have posted. The second, i connected 2 probes to my picoscope, i let them staying freely (Did not connect anything to anything), the result shows the same .
2/ I use my Picoscope with Laptop.
3/ Actually, i set aside the genuine Picoscope USB Cable and using another same type.
4/ The levels are the same with nothing connected.
I have posted the text From Help -> About .... in word format. Please help me to solve this problem. Thank you so much!
- Picoscope 2205 MSO Data.doc
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