(i) SNR no longer saturates at +20 dB (ii) a large signal in the passband no longer causes the SNR of weaker signals to be biased low.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8200 ab8295b8-cf94-4d9e-aec4-7959e3be5d79