sidefx:
I'd be really curious how the attenuation figure that snap measures is actually measured and how it relates to and differs from the attenuation figure people actually see on the Fritzbox. You're not the first to see quite different figures, in fact I had a prequal done and I think also got different figures.
The Chorus netmap data was all compiled manually during the cabinetisation rollout with staff conducting multiple tests at various locations off each cabinet/exchange to establish the line figures.