My guess is most of us won't use the h3 to its full capacity with all 16 tuners in use at 1 time. If that were the case it may or may not cause intermittent issues with cable rated under 3 ghz.
Huh? The Hybrid LNB specs that I've seen say it uses up to 2.2 GHz. AFAIK the tuners all run on MoCA which is pretty low frequency.
Dish requires 3GHz wire be used in all installs, which is what we and all other authorized installers use. With that said, H1's and H2's require 3GHz between the node and the Hopper, 2.2GHz from the dish to the node. Hybrid's require 2.2GHz all the way from the dish to the receiver.