Rodger, Thanks for the code and explanation. I will load it into an Arduino and connect one of my ublox modules to it. When I get the RF front end put together the emulator should give me a nice signal to look at on the scope. To feed my own data in I could program a Blue Pill board with a NEMA string and have it send the string every 60 seconds. I took a quick look at your code. From what I can see you read a sentence, then send the data over a 60 second period, delay 150 msec, and wait for the next sentence to come in. I could have the Blue Pill send the string and then count 60 pulses from the GPS and send the string again. Rinse and repeat.
Bob, I am guessing what they are doing is to simply determine if the phase has changed since the previous second. That is necessary in order to extract the time/date information. That way you can get within a couple of hundred milliseconds of current time. Certainly good enough for a consumer clock. I have no need for time precision or frequency calibration. I already have GPS equipment I have assembled for that purpose. Paul, I know I can purchase the ES100 kit when they become available again. But I want to do it myself with discrete chips and parts to prove I can do it. That way I learn something new and kill time (no pun intended) in the process. Tom, thanks for the links. Interesting reading. Ray, AB7HE -------- Original Message -------- Subject: Re: [time-nuts] WWVB PM Time Questions From: Bob kb8tq <kb...@n1k.org> Date: Thu, July 30, 2020 12:53 pm To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com> Hi Since they have no interest in extracting the carrier phase for timing, there is no real need for a fancy oscillator …… Their definition of “precision” and the TimeNut definition are pretty far apart. Bob _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.