I'm trying to use the 2205 scope to see a problem on my ultrasonic driver circuit that for some reason isn't working. However I have spent weeks trying to figure out why my scopes are showing 52kHz noise coming out of the amplified output of the amp on my board.
I have finally pinned it down today by shear luck, and it turns out its absolutely nothing to do with my board, and it was just the fact that my amp was increasing the noise enough to make it visible. The noise is in fact coming from the scope itself
Can someone try this and confirm it or let me know how to solve it. Connect your Pico to the PC, open up software, set collection time to 5ms, divs to +-100mV and no triggers. Now without a probe connected, you can't see much. Put your hands around the Picoscope box or connect a probe... notice a 13mV P-to-P 52kHz noise.
Problem... when I connect this to my circuit the noise is showing up and getting in the way of the critical readings I need at the low mV levels (the entire reason I brought this scope). Any ideas?