This video from Tektronix tstarts out a bit creepy, but gets into a very nice fundamental and basic description of how and why squares can be used for characterizing circuits. It can help solidify concepts and gives some good tips about observations on scopes.

 

Thanks @Yaakov,

helpful and educating for me

doros

 

Love these old videos.

They sure don't make 'em the way they used to...