8-VSB's threshold C/N ratio changes with the number of equalizer taps engaged to cancel out multipath.
In a challenging environment, the 3 dB 'advantage' of ATSC goes away. John----- Original Message ----- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
The problem with comparing spectral efficiency, we should always remember, is that it makes no sense at all to compare it UNLESS you include the threshold C/N ratio required for solid reception. Without the *two* numbers, you can take any position you want and rant about it. So in this case, the comparison is that with a slight drop in b/s/Hz, you are also saddled with a 3 dB increase in the required signal margin.
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