Paul, You message came in just as I clicked Send on my message. If I change the MC34151 to a 7474 to synchronize the 60 kHz signal, does that mean the phase change always occurs on the zero crossing like WWVB?
Ray -------- Original Message -------- Subject: Re: [time-nuts] WWVB PM Time Questions From: paul swed <[email protected]> Date: Wed, August 19, 2020 1:15 pm To: Discussion of precise time and frequency measurement <[email protected]> Alright Ray we can gang up on you with two of us. By the way with respect to a BPSK modulator as mentioned I did just did that and without any special driver chip. I used a ttl 7474 to synchronize the 60 KHz reference to the incoming data. Data in to D and 60 KHz to C, Q and QNot to 180 ohm R to drive the diodes. Most likely this could go to 90 ohms and perhaps allow 0 dbm in or higher. But did not need that level as I needed to drop to at least -50 db for the KD2BD receiver I am working on. The reason to use the driver chip in the d-psk-r is with the higher voltage I can get more driver port isolation. Regards Paul. ___________________________________________ 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.
