Paul, Yes, I built the d-psk-r per the schematic. However, I think I did not understand how it actually worked. I was expecting it to be able to duplicate the WWVB sine wave signal with the phase reversal present when the PM data bit changed from a 0 to 1 or 1 to 0. I have a 60 kHz sine wave going into pin 8 of the mixer transformer. I expected to see a sine wave out of pin 1.
However, I looked at the code again and it appears the "LO" port of the mixer is only driven one per second. There is no steady drive to the "LO" port so there cannot be a sine wave out of the "IF" port. Is that correct? Or should there actually be a 60 kHz sine wave coming out of pin 1 on the mixer? If so, something is wrong with my d-psk-r. I am not trying to use it with any kind of receiver. I just want to see the sine wave on my scope. Ray, AB7HE -------- Original Message -------- Subject: Re: [time-nuts] WWVB PM Time Questions From: paul swed <[email protected]> Date: Tue, August 18, 2020 12:19 pm To: Discussion of precise time and frequency measurement <[email protected]> Ray I would tend to agree but I actually am unclear on the context. Did you actually build a d-psk-r? _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
