It's interesting that you asked this question, we took our first trip last weekend and I had the same issues. My 2011 3170DS is new to us, bought it used in February. When we got on the campsite I hooked up the cable and scanned the channles on all 3 TV's in the unit. The reception was horrible, you could barely see the picture, it only located about 6 channels. I was wondering if there is a hookup problem somewhere in the wiring. Everyone around us had great cable reception so I don't think it was my site.
I raised the antenna and got about 15 beautiful HD channels, especially CBS for the NCAA tournies. I was happy, but I don't know why the cable reception to each TV is horrible.
I will look for a switch.
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2011 SunSeeker 3170DS
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