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All posts by will

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Preece J: There is a trade-off between available capacity and the amount of error correction.

The more error correction there is, the easier it is to get the multiplex without error, but at the cost of available capacity.

The PSBs, BBCA and D3&4, have 1/3 of the transmitted data devoted to error correction, leaving 2/3 for actual services.

The COMs ARQA, ARQB and SDN have 1/4 of the transmitted data devoted to error correction, leaving 3/4 for actual services.

So, for example, BBCA has an available capacity of 24 Mbps (Mega bits per second) while SDN has 27 Mbps.



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