[kalee20]

Good show!

The controls you have in the photo actually look a bit fewer than the 545a, so that's good news.

These 'scopes had various OUTPUT signals as well as inputs. There's a nice linear sawtooth, and also a pulse, available on output sockets, all buffered from the internal sweep generators. I have only ever used these twice, but it's a nice-to-have on the odd occasions (you can make a crude component curve tracer using the sweep output to progressively drive the component, for instance, while monitoring something else via the normal Y input).

Chris is dead right that at the time, these were the Rolls-Royce of 'scopes. As such, not an ideal first 'scope, particularly as if you don't get what you are expecting, you don't know if it's because you're not driving it properly or if it's because it has a fault. But it is a fantastic scope to possess!