Firstly, apologies if this is in the wrong space, please move it if it is.
I have a channel and all it's sub-channels showing 100% Signal, 100% Strength, but almost always 0% Symbol. It's the CW/Comet/Roar signal, if that matters...
Every other OTA channel is fine, including around it and from the same transmitter site, so it's not my antenna being knocked or moved - also visually checked that. 
This used to be rock solid up until a week ago.
Is this a signal that's now too powerful ? That's my only guess...
