eg What is the max data rate of a 3000 Hz line with an S/N ratio of 20db?
20 = 10log10 (Signal power/Noise power)
20 = 10log(S/N power)
S/N power ratio = 100
C = B * log2(1+S/N power)
= 3000 * log2(1+100)
= 19,963 bits/second
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