Title: Unremovable bias on 4202C [Print this page] Author: Andrei Time: 2018-5-22 04:46 Title: Unremovable bias on 4202C I have noticed a small constant positive offset in voltage readings on both channels in my new DSO4202C. The offset is approximately 1mV and disappears when I switch to GND coupling mode. But in both DC and AC (!) coupling modes it is present regardless of short or open circuit at inputs. Self calibration did not help to remove it. Please tell, is this normal and can it be adjusted/fixed?
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