Hi Raymond, I meant to look at effective bits as a general view on all DSOs. I don't know what the detailed differences are among the TDS scopes. I actually find it quite confusing with all the various models, since I'm not very familiar with them. One thing I do know, is that I "upgraded" my TDS754 (I think) a while back, to perform as a TDS784, using some mods I found online. As I recall, some BW limiting caps needed to be deleted from the amplifier circuits, and some jumpers needed to be changed to make the brain think it was the higher-end model. It appeared to work.
Ed
