Re: Scope grounding and generators
On 2020-10-25, at 19:07, firstname.lastname@example.org wrote:
Surprised that nobody has given the obvious answer yet:
Get a high-voltage differential probe.
These can be expensive, but if it does not have a to be a Tek, the original question would scream for a Micsig DP10013 or DP20003 (depending on your budget and the voltages you need to look at).
These come from Shenzhen, but are not bottom-drawer garbage.
The main limitation of these is the noise: ≤ 40 mV rms in 50x, ≤ 230 mV rms in 500x (DP10013 specs).
So you can’t measure a dynamic microphone that is stuck at 300 V from earth ground :-)
(These are 100 MHz probes, so setting a bandwidth limit on the scope is going to help some.)
https://www.amazon.com/dp/B074K4XPW3 (a bit expensive)