I have an installation in an RV with 2 HD receivers. They are the H24-200 and an H24-700. I have been having problems with the H24-200 insofar that it intermittently (most of the time except on a super clear night) will not tune all the HD channels. When I replace it with the second receiver, the H24-700 everything works fine. I discussed this problem with Direct TV and have replaced the H24-200 twice with the same errors. I was told by a tech that there are some differences between the 2 receivers and that I should get a second H24-700 and that will fix the problem. Is this the problem? The antenna system is a Winegard Slimline Traveler Model SK 3005. Please help!