Welcome to the Nerdz site James,
I too am not a Mechanic or diagnostic tech, however I am an Engineer also. I don't recall how I stumbled across this site but I like you like cars and fuguring out anythihg electrical. You will get hooked as I have,
Dave Hill and all of these guys on the site are a great bunch and will make you feel welcome at at any level of experience or lack there of.
I have a son who used to be a transmission tech in a GM dealership and is now a ground support equipment mechanic at Delta Airlines. I love going through his old GM training material, etc.
My day job has been designing power substations for 25 years , + a 3 year stent in the US Army (Radio Relay & Carrier Equipment Repair) and the past 11 years have been spent coordinating the design and cost estimates for high voltage transmission lines in the central and southern part of the State Of GA.
It sounds like you will fit right in with your experience in scopes and radar equipment. Tom Roberts is a great guy and can fix you up with a Pico. I bought a 2 channel 3223 pico scope kit about 6 months ago. That's enough about me!
Again welcome.
Danny Berry