I have the 26DBH also. Here is what I've discovered and had to do in order to watch TV off of an outside dish:
The connections are useless. Cannot be used. I ran a short (4") piece of "flat coax" through the window of the bedroom. From there I connect a 10' piece of RG6 to the receiver above the TV, and use RG6 on the outside connection, to the dish. I have made it work with 100', but often it requires 50' or less. Unless the cabling connection is direct from the dish to the receiver, it doesn't work. It can't go through any kind of splitter or device such as comes on the TT. I have no idea why the manufacturers label the connection "Sat/Cab" because it ain't Sat!
I am not familiar with CAT6 cable. CAT5 is shielded twisted pair, which is telephone stuff, not TV. Possibly you mean RG6 which is good. I used RG59, and had problems, till the folks on here steered me towards RG6.
I have used both Dish and Direct. I have had a lion's share of problems. Many campsites just simply have too many trees to get a reception, at least down here in the South.....
Best of luck with it. It has frustrated me to no end for 16 months.