If it's Comcast cable TV, you need one of their converter boxes. They use a different digital standard than over-the-air transmissions. We're on Comcast cable at the S&B, so we're familiar with it.
We stayed at a CG in SW Washington this season and they had just been blindsided by Comcast changing their signal without telling them. They were told (after the change) that they'd need a Comcast converter box for every site and that it would have to be put very close to the RVer's TV and the RVer would need a Comcast remote to run it. AFAIK, the range of those remotes is fairly short and might not even reach to the converter if it's outside.
If the CG risks providing a set-top box and remote to each guest, the manager has to get that stuff back as the guest departs so the next guest at the site can have cable. What a hassle. I guess, if you HAVE to be able to watch TV on your travels, you might have to get your own satellite system or rely entirely on OTA signals. I don't know if taking a converter and remote of your own would work, but I don't think you can get one from Comcast unless your S&B is on a Comcast system. We have to have a converter on each of the three TV sets in the house. There hasn't been any interference between the remotes because all three TVs are different brands.
I suspect that CG cable TV is going to disappear soon anywhere with Comcast cable service.
Frank and Eileen
No longer RVers or FR owners