Hi all,i built a classic design octopuss curve tracer a while ago for testing diodes etc,it works great on an old tek 453 scope in xy mode,also works fine on my old kenwood dso,i recently brought a rigol DS1052D scope,no matter what all i get is nonsense displayed,thats using xy mode,ive fiddled with all controls but i cant get the expected pattens displayed,any ideas?TIA