Ray, I'll answer your question as I've done this. The d-psk-r's intended use is to remove the bpsk from the WWVB carrier for the purpose of allowing older WWVB receivers to recover phase info from the carrier and it works very well for that purpose. But, it can also be used, as you are trying to do, to generate "something similar" to the WWVB BPSK signal by feeding it 60 khz and letting the mixer do the phase modulation. I've done it, and it works. But there would certainly be some differences between that signal and the "real" WWVB BPSK. For one, the real WWVB signal has phase coherence between the 60 khz and the timing of the phase flips. You won't get that with the d-psk-r as it's not necessary for it's intended purpose. Obviously WWVB also has the AM component too so that would be missing if using the d-psk-r to modulate a carrier.
But depending on your intended use, I see no reason that using the d-psk-r as a "re-psk-r" shouldn't work just fine. If you're putting a sine wave in to the mixer on pin 8, you should be seeing a sine wave out on pin 1. It's as simple as that. And that sine wave should shift 180 degrees (invert polarity) if you flip the polarity of the bias on pins 10 and 15. If you don't have any DC bias on pins 10/15 I'm not sure how much signal would pass through the transformers though I don't think it would be much as neither pair of diodes would be conducting. Good luck, Rodger -----Original Message----- From: time-nuts <time-nuts-boun...@lists.febo.com> On Behalf Of rcb...@atcelectronics.com Sent: Wednesday, August 19, 2020 2:20 AM To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com> Subject: Re: [time-nuts] WWVB PM Time Questions 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 <paulsw...@gmail.com> Date: Tue, August 18, 2020 12:19 pm To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com> 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 -- 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. _______________________________________________ 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. _______________________________________________ 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.