Mark Lloyd wrote:
On 04/21/2014 09:45 AM, Ralph Mowery wrote:

That is right. Analog signals get snowy if the signal level is
weak. The digital signal strength does not mater as to quality of the
picture.
You either have enough signal for the receiver to work or you get a blank
screen. Under some fading conditions you may see the picture look
like square blocks and frozen up. That is where the signal totally goes
away. It does not mater if you have 100% 0r 10 % signal, if it is enough
for the circuits to get the information, the quality will be the same.

IIRC, 70% is enough signal you should get a perfect picture (as good
as 100% signal).

70% of what??