Signal Quality is constant over a short time frame, but varies slowly between 94% and 100% over the course of a day. Symbol Quality is consistently 100%.What are your numbers for Signal Quality and Symbol Quality and are they constant or bounce around a lot (more than 5%-10%)?
That's all until a signal outage incident. Then, Signal Quality drops to below 50% and bounces, or even to 0%, and Symbol Quality drops to 0%. Screen is corrupted, or freezes for duration of outage. This happens for 1-10s and then all is fine again. These outages can occur every few minutes, or be single isolated incidents and not occur again for at least an hour. They *only* happen on HD channels (all on the same multiplex on ch21).
They don't occur at all on any other device on the same antenna (TV or PVR) with a built-in tuner, nor do they occur for my neighbours.