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MSO6104a DC coupling not working - capacitive effect...

Question asked by johandesmyter on Mar 6, 2013
Latest reply on Mar 7, 2013 by alex.forencich
Hi,

I have a MSO6104a scope at my office and i don't know why, but the scope do not allow me to measure dc signals. it is well configured (in the probe option i selected DC coupling) .

When i power on the supply (not connected to anything but the scope), i have a peak and a signal like a discharging capacitor and the signal goes to 0. Then it remains like this (even if is switch off and on the supply). 
I have to measure the ground to get a negative peak and a signal like a capacitor charging.

Can you help me with that issue? 

Thanks you,

Johan

Edited by: johandesmyter on Mar 6, 2013 6:47 AM  

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