On Sat, Mar 26, 2011 at 4:31 PM, Lenny Story <le...@codematic.com> wrote: > Chris, > My design isn't really that sophisticated hardware wise. Its an 8051 > variant, and the CMMR-60P which can be obtained from Sparkfun.com. I do > wind my own antenna, which is just a quad, made from PVC and a metal > electrical box. The circuit sits in the center. It's done with a 2.5 inch > square, 4 layer board from pcbexpress.com. > The software samples the bit signal coming from the CMMR, every 10 ms > (essentially), and uses a 100 bit array to qualify it using a weighting > algorithm. The start of the bit train, and with it the sequence of 10ms > samples, is essentially polled very fast to catch the beginning of the > second as soon as possible.
So you are looking at the output bit of the CMMR-60 once every 10 ms? Then I'm guessing you will not get uS level precision. The software I'm writing runs under Linux and reads the bit every 1 msBut I was wondering if I should do better and try for uS level timing I think your success with receivig WWVB must be the antenna. Could you say more about it. ===== Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
