Hello, when the impedance of the circuit you're examinating is low enough (say 10 = kohm), do you usually use the 1x or 10x probe mode? I've always used 10x, like gluing the switch, as it had more voltage headro= om and loaded the circuit less, but now I begin to feel stupid that I did it. I reckon I shou= ld use 10x only where it's necessary: the need for probe compensation, extra noise picked u= p.. is this worth for having more (often not necessary) voltage headroom, or for loadin= g with 1 Mohm instead of 10 Mohm? I'm glad I didn't really glue that 1x / 10x switch, now that I need to swit= ch the switch. :D I'm thinking to use 1x now as much as possibile, except (of course) ONLY wh= en the voltage would go too up or when the impedance of the circuit under exam is really h= igh. Comments? Am I more fool now or before? :P NOTE: of course I am self-taught, I ain't a student (I don't even have the = age for it), but you probably already noticed that I don't have a master nor a degree in ele= ctronics. :o Cheers, Mario --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .