I can't figure out why Direct TV would have to install any box. The system I use up here (Bell TV) is the same as your Dish Network in the USA.
For satellite, your roof dish should already be set for Direct TV
Plug in the Direct TV box to the front satellite coax
Power up satellite dish
Select HDMI 1 or 2 (usually 2) and start the Direct TV setup, then you should be good to go.
For the Direct TV box in the bedroom if it doesn't have 2 HDMI ports, then use the HDMI port to plug into the extender for the outside TV and use Red-White-Yellow component for the bedroom TV, set the bedroom TV to the proper input and it should be GTG. Outside TV set to HDMI 1 or 2 and it will be GTG off the bedroom Direct TV box
For RV cable, just plug into the park system and switch the TV inputs to Cable and again you should then scan for channels and TV should appear. When using the RV park cable, make sure the antenna is off at both the switch in the upper driver compartment and the switch at the antenna itself. Change TV inputs to antenna and whatever signals are available off air will work.
I think that box is what is causing you the grief.... cause I can swap back and forth with no issues (once I figured out connections and some box setup help from Bell)
Maybe post is "Direct TV SWM" needed on a 40e on the TV/Web forum which is listed in the forums menu.
Looking up some trip options for you this week. Heard from the kid, he is newbie so he gets night watch as the 2 Fisheries enforcement guys wanted the more experianced deckhands with them during enforcement actions. Can't blame them, if something went sideways you don't need in-experianced unarmed deckhand in the way. Might change next week with new enforcement guys comming on. He says all feedback so far is "constructive" (I take that to mean he ain't getting yelled at).
See, up here our Coast Guard (not being part of the military) isn't armed YET..so when on enforcement missions they carry RCMP or Fisheries Officers with them. But that will change in the next couple of years, beginning with our new Icebreaker patrol ships coming on line to keep an eye on what Putin and his cronies are up to. Gov't is already tasking our F18's for daily patrols right up to the Russian border. Our PM gets pretty testy when the non-polar type bears start sniffing to close to the Artic.
Brian & Nicola
2013 Discovery 40E "DISCO"
TOAD 2014 Wrangler