To increase channel capacity ($C$) according to the Shannon-Hartley theorem, what must one either increase or improve?

Answer

Bandwidth ($B$) or the SNR ($S/N$).

The formula dictates that capacity can only be increased by raising the bandwidth of the channel or by improving the signal quality relative to the noise ($S/N$ ratio).

To increase channel capacity ($C$) according to the Shannon-Hartley theorem, what must one either increase or improve?
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