Is it possible to have too much signal from your aerial? What would the result be if this was the case?
The answer to the first question is yes, and to the second question…the result would be the same as having too little signal, a pixelated picture or even no signal.
Twice in the last week I’ve been called to homes where this was happening, both homes had aerials that had been fitted by me four or five years ago. At that time I had used masthead amplifiers on the aerials to compensate for the poor signal level and all had been well until a couple of weeks ago. At this time both homes started to experience poor reception.
This was remedied by removing the masthead amplifiers which dropped the signal level by about 16bd, enough to produce a perfect picture in both cases.
These are not isolated cases, over the last year I have removed several distribution amps and replaced them with professional passive splitters. The signal is obviously being improved as time goes by making the need for amplifiers less common, which is good for everyone. There are still cases where amps will be needed but in general the signal is becoming much more reliable.