Myself and my collegue are currently trying to understand the source of the signal noise displayed on our 4224 Picoscope.
We have tried the following tests:
meausurment scale -10 to +10v
Device BNC connected - Peak to peak noise 38mV
Probe BNC connected - P-P 38mV
BNC disconnected - P-P 38mV
Laptop Power supply and BNC disconnected - P-P 38mV
For a full 12-bit signal I would expect to see 2^12 parts or 4.9mV resolution from a 20V measrment window.
With a peak to peak noise level of 38mV, the true resolution appears to only ~9-bit.
Is this normal for the Picoscope Anologue to Digital converter?