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60% decrease from the HBU55 over the HBU33. That seems pretty significant.
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Not really. When switching back and forth from linear (percentages) to logarithmic (exponential) terms, it's easy to get freaked out by the "numbers".
Consider that the theoretical dynamic range of digital TV reception is about 80 dB. That's a range of 1 x 10^8th power difference in signal strength when measured in absolute signal power units. If you reduce the signal by 10 dB, it's a 90% reduction in signal power. Another 10 dB takes it to a 99% reduction. Another 10% takes it to a 99.9% reduction and you sill have 50 dB of range left to continue the exercise.
