fpll_btloop_coupling.h File Reference

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Variables
static const float	FPLL_BTLOOP_COUPLING_CONST = 3.125

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Variable Documentation

const float FPLL_BTLOOP_COUPLING_CONST = 3.125 [static]

Magic coupling constant between GrAtscFPLL and GrAtscBitTimingLoop. Trust me, you don't want to mess with this.

The agc block buried in the FPLL indirectly sets the level of the input to the bit timing loop. The bit timing loop's convergence properties depend on the the mean amplitude of it's input. This constant ties them together such that you can tweak the input level of the bit timing loop (somewhat) without screwing everything.