8 Apr
2005
8 Apr
'05
9:52 a.m.
On Fri, 2005-04-08 at 11:55 -0400, John Allain wrote:
<snip>
I don't claim to be a EE, but FWIW...
(I'm sure someone will put me in my place if I say anything out of
line. :-) )
Subquestion Number one for me would be the reasoning
why
those probes are so important. How bad are readings taken
with just direct wired connections?
Impedance. What effect does the "load" of the scope have on the circuit
being tested? The "load" of the scope is (probably) significantly more
w/ out the probes.
Should a scope rating 2X the computer clock speed keep the
readings useful?
I believe that's correct. My (old) B&K was targeted for TV repairmain,
so its rating is a mere 10Mhz. (Analog TV is spec'd at a 4Mhz
bandwidth)
David