[time-nuts] WWVB PM Time Questions

[paul swed]

Ray
Are you speaking to the d-psk-r software? Its quite a bit more involved
than what you mentioned. Its in the coding sequence. But could it be put on
a bluepill absolutely. Its worked on all of the arduinos we have tried. The
other thing is that by feeding a 60 KHz CW signal into the d-psk-r
modulator/flipper it turns the signal into a wwvb bpsk signal. No AM
modulation. But for bench testing its a noise free signal.
But I am interested in the approach you are trying to develop that I guess
might be a SDR solution. Good luck looking forward to your success.
Regards
Paul.

On Thu, Jul 30, 2020 at 6:25 PM <rcbuck at atcelectronics.com> wrote:

> 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 <kb8tq at n1k.org>
> Date: Thu, July 30, 2020 12:53 pm
> To: Discussion of precise time and frequency measurement
> <time-nuts at 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
>
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