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Thanks again guys. You are right, this is an education for me and I appreciate it. I especially appreciate learning that my neighbor's scanner is not an issue and that having a pre-amp is totally unnecessary in my situation.
As far as the splitters go, the installers put them in, and as far as I knew, that was how you got to multiple TVs. I hired the installers because I had no idea what to do. But in the installers' defense - when they installed (and I was here watching them) they tweaked the antenna for a long while as they kept checking the quality and intensity of the various signals. At that time, and, again, many times after, ALL of the channels (VHF & UHF) seemed to come in perfectly.
It was a few weeks after the install that I noticed that the UHF channels (17 & 29) that I watch sometimes, would pixellate and completely drop signal. All of the VHF channels continue to come in perfectly. And sometimes even these UHF channels (17 & 29) come in perfectly with no pixellation or dropped signal. But, way too often for good TV viewing, these channels (17 & 29) and only these channels pixellate and drop signal. (I have to admit I don't often watch the other UHF stations).
From what I can gather from the threads, I think that the easiest and first thing for me to try and test is by disconnecting the other outputs from the very 1st splitter that comes off of the antenna. With a ladder I can reach that and, I believe, handle it (at least for a test). That will be a great test of counteracting what I think you are calling the "reflection" issue.
2nd, if "reflection" does not seem to be the problem, then I will definitely have to call the installers back to help with re-adjusting the antenna according to you guys and your advice.
Thanks again for hanging in there with me and pointing me in the right directions.
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