Actually most of those offerings are general purpose. Its the plugin variability
that allows one to deviate mainframe from a generic scope and solve a particular
measurement problem.
Take a look at catalogs -
http://w140.com/tekwiki/wiki/Tektronix_CatalogsThe 545 in particular was mainstream scope in many companies. It would be interesting
to know how many total were sold. I am guessing jillions.
The best of both worlds.
There are specialized, at the time 519 would be considered that, or dual beam, but they were
not its core business. My observations based on activity as an FAE calling on many companies
in Northeast.
But en total they were in the mainstream scope business. Lab grade. Not in competition with
Eico or Heathkit or Knightkit.
Regards, Dana.