Thread:Clarifications about AvanceII document (1)

"The main difference from earlier Avance series of spectrometer consoles is introduction of the DRU (Digital Receiving Unit) in it and the larger integration of different spectrometer devices into a one block."

is this comparison of Avance II with the earlier models or Avance III with earlier? - I'm guessing it's Avance II, but sounds a little ambiguous.

Also, regarding last two sentences in the paragraph about AQS/2: are these parts optional, while previous sententence talks about mandatory parts. In the last sentence: is it only optional parts can be multiplicated in the console, or all parts?

Thanks for the informative document.