Siglent sds1202xe strange behavior

[MarioBros69]

I had an SDS1202x-e for a couple of days and while measuring a half-wave rectifier the following occurs to me

I ask the forum experts because I don't know if this is normal behavior or a malfunction

I take the measurement in automatic and everything is correct in 5v/div


I go down to a 2v division and everything is correct


I go down to 1v dvision and the bottom of the signal is completely deformed

[MarioBros69]

Thanks... that's exactly what happened to me