The DB8 and 4228 are both more directional, I would try the 4228. Realize that some of these channels are off axis, so more directionality might get you CBS, but might also degrade some of those.nrc said:...WBNS 21 has frequent dropouts and breakup. Worse during the day and getting better through the night.
This is puzzling because as you can see it's the exact same direction and distance as WCMH 14 and that comes in perfectly. Both show about a 92 on signal strength but during periods of breakup the WBNS signal drops into the 40s for brief periods.
The provided antenna is a DB2. Based on some reports that the HD Tivo's receiver is easily over-driven I tried putting a 6db attenuator in the line with no affect...The only other thing I can think of is maybe a more directional antenna if it's multipath. The DB2 has a 90 beam width so I may try turning it a bit to see if I can get the multipath source out of the beam and still keep a good signal..
It might not even be then, but it still could be. The attenuator can lower the actual signal level without lowering the quality readings, because even at a lower signal level (up to a point) all of the bits can still get through uncorrupted which is what the signal quality measurement is really measuring, as opposed to raw carrier or power levels.nrc said:I tried an attenuator with no effect. I would guess that unless you've got a signal in the upper 90's overload isn't a consideration...
Not to be obvious, but that would be a pretty strong clue that you might not have enough signal. Classic threshold reception. A high-gain, directional antenna, and possibly an amp, would probably be sensible steps to consider.nrc said:The attenuator was one of the variable ones they have at radio shack. When I said "no affect" that wasn't quite accurate. I should have said, no improvement. Breakup and freezing got steadily worse as I increased attenuation.