Yes, for best frequency response the ground lead should be short and
the area between it and the probe minimal.
You may see ringing and other strange stuff with your separate ground lead.
Probably OK for a rough check of supply voltages or slow signals, but
definitely no use for ripple and noise measurements (in those cases
sometimes even the supplied alligator leads are just too long).
You need to think about what you are measuring and adapt accordingly.
Using the absolute best setup all the time is also completely impractical.
ST
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On Thu, Aug 16, 2018 at 6:05 AM, F4GNY <f4gny@...> wrote:
Question : sometime when troubleshooting radios, I use a ground lead
between scope and radio to avoid using probe's aligator clip.
What do you think about ? can I introduce false mesurements ?
Regards
Alain
