Oscilloscope question

My first 'scope, I still have it, was a Solartron CD1400. It came not only with a computer operating/service manual (including schematics), but also a quick-reference guide that slotted into a metal pocket on the back of the 'scope. That contained abridged operating instructions _and_ the full schematics. Solartrond DVM manuals (and the manual for the DTU [1]) contain schematics, or at least the oens I have do. [1] Data Transfer Unit. A data logger without the ADC. It connected to the printer output port on just about any DVM, translated the data a digit at a time into any up-to-8-bit code (there was a 16*8 diode matrix ROM) and then conencted to a teletype or Facit 4070 tape punch. The thing could take relay boards to connect several inputs sequentially to the DVM, a clock board that could cause it to take readings ever so often (and output the time to the tty or punch), and so on. Quite an interesting piece of history. That was quite common at one time. DEC PDP11 and PDP8 manuals often included ROM dumps, flowcharts, state diagrams, and so on. These machines wre _documented_ Alas I only have the preliminary manual for my Philips P854, so I am laking the mciroocde source. I do have schematics. I also have the manual for the 4-channel serial card. This is microprocessor based (I think 8085), and the manual includes a sourve listing of the control ROM. The manual for the SMPSU contains a couple of pages of waveforms round the chopper circuit. It warns that this is live to mains, and that the PSU should be run from an isolating transformer for these measurements. Should this be impossible, it suggests removing the mains earth lead from the 'scope and 'floating it'. Somehow the idea of a 'scope with the chasiss at about 120V wet local ground (the mains input of the SMPSU is the standard bridge rectifier cirucit) doesn't thrill me... -tony