[time-nuts] TPLL secret reveled

jimlux jimlux at earthlink.net
Fri Jun 11 03:56:28 UTC 2010

Ulrich Bangert wrote:
> Jim,
> pardon if I correct you: The reciprocal counters were an intermediate thing
> between the counting only and the subclock interpolating ones. A reciprocal
> counter would notice when a frequency measurement would be too imprecise due
> to an arkward relationship between that gate time and the frequency to be
> measured.
> With only a few zero crossings within the gate time a reciprocal counter
> would use the frequency to be measured as the source for its gate time and
> measure the frequency of its reference with that. The result is then back
> computed to the frequency to be measured.
> This principle has nothing to do with sub clock interpolation. Nevertheless
> it is true that once that the reciprocal principle has been introduced it
> has been used in all following technologies.
> B


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