On Sep 13, 2005, at 11:08 PM, Vic K2VCO wrote:
I bet Wayne knows a good algorithm!
Indeed I do. And it took several weeks of serious R & D and coding the
first time we developed an ATU (KAT2).
Among other things, the code uses four tuning phases, each with
different granularities; time-based SWR target adjustment; hand-tuned,
pseudo-grayscale switching of latching relays; SWR-based look-ahead
tree pruning (borrowing extensively from game theory); scaled L-C
stepping near local minima; and, when possible, L-C range prediction
based on band information.
It was a wonderful, hair-pulling, sleep-depriving, learning experience
that I wouldn't deny anyone by giving away the details ;)
73,
Wayne
N6KR
---
http://www.elecraft.com
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