Quote Mechie
Trial and error is the best way of getting it wrong ?
Someone explain that to Mstecha!
Zack
Great to have a 'scope, it will help you see how circuits are or are not working.
But beware, as you have seen already, they can corrupt the operation of a working circuit, as can any piece of test equipment.
All my scope probes are x1/x10 switchable, and 99.9% of the time use them in x10 mode and do a mental calc to get the correct voltage.
When using x10 probes, DONT FORGET to adjust the frequency compensation trimmer. Otherwise you will get an incorrect voltage reading if the frequency is above a few hz.
For lots of good info about using oscilloscopes, have a look at the Tektronix website,
www.tek.com.
They have a selection of "primers", one called "ABC of Probes" is quite good.
JimB