Dave investigates two very serious issues with jitter on the Rigol DS1000Z series oscilloscopes, including the DS1104Z and new DS1054Zbr Some sort of modulated samplingtrigger jitter problem at 5 microsecond intervals (the "5us jitter problem"). And severe jitter with the AC coupled trigger mode, a problem which is also present on the DS2000 series scopes as well.br br NOTE: So many people have been confusing AC trigger coupling with AC input coupling people will be more familiar with.