I thought this was a cool depiction of a variable frequency drive.



Sometimes when systems are dumbed down like this, they are easier to comprehend.

Guys,
What is a Proboscope and what purpose does it serve? I have a proboscope on the shelf here and it hasn't seen any service since I have been employed here. I don't know if this is a piece of test equipment that is designed to test a certain piece of electronics or is it something that can be used for every day troubleshooting.

Thank You!