[sdiy] look Ma, no hands! ??

[harry]

Try this....

Put one of those clamp on ferrite noise filters over your whole scope
probe
(near the BNC end)...

Very high frequencies like to crawl up the outside of the shield... I
presume
they look something like little ants...

H^) harry

Dana Scott wrote:

> Try this: slip a ferrite bead over the scope ground lead....
> -Dana
> -
>
> >Typical of the little bag of parts is...
> >1) a coil spring that slips over the probe with the tip removed...
> and has
> >a sharp point. This is used to make a ground connection at the same
> time as
> >the tip connection. This will eliminate as much inductance from the
> measurement
> >as is possible with that probe.
> >
> >Use this as a sanity check when you think the scope is lying to you
> from
> >inductive pickup in the ground lead.
> >