3 GHz is required due to the band stacking that allows so many channels to be used at once.
Required? I have an awful lot of RG6 in the Hopper system. What I installed from roof to attic is from Monoprice and is about 15 years old. The main line that I fished from attic to basement was dual cable (with ground) I recovered from a cable installation and is much older. Where are the nice charts of the bandstacked frequencies?