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#1381
Originally Posted by robthebold View Post
If I were to hazard a guess at their motivations, I'd suppose that they chose 3 symbols -- and those particular three -- instead of two to ensure that you'd never send the same symbol twice in a row. This might make timing recovery on the receiving end much easier. You get away without a clock on that end.
Interesting! Let me take another look at my info; I'd thought that while you'd never get a 1 or a 0 twice in a row, the "same as previous bit" value would be sent as many times as necessary to get through a sequence of identical bits...

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