Originally Posted by dmichael
Wouldn't you expect that the signal strength meters on my TV and DVR would reflect an off the chart signal as 100%, instead the TV says 64% while my DVR says 88% (measuring same digital channels on both).
It's odd, but too much signal strength can actually hit equipment so hard, it registers as a reduced signal.
A similar thing can happen with satellite dishes. They encounter what is known as "splatter", where the signal is so strong, it actually breaks up and becomes harder to lock in on.
Your TV may be experiencing this same effect, where the signal is so powerfull, it's breaking up and appearing to exibit poor signal strength.
Think of it like this:
Before I had a TV with multiple inputs, I used a video switch box. The problem is, every time a trailer for some suspense or horror movie would come on, the video would flip and roll. Why? Those silly white flashes they put in where too "white" for the switch box. The box didn't have enough headroom to handle that high of a video frequency, so the image went wonky.
When I had cable at my last apartment, I had the same issue with too strong a signal. I'd get knocked off the 'net all the time with my cable modem. As a result, I had to have an attenuator on the line to drop the signal down enough so the cable modem could use it.