Sal M. Onella wrote:
By the old TASO standards, you need over 40 dB s/n to get a nice picture,
which requires a lot more peak RF power. By comparison, the digital signal
needs only about 17 dB s/n.

What happens at a 12 dB s/n for both? That's probably
what happened here during Hurricane Ike.
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73, Cecil http://www.w5dxp.com