[time-nuts] WWVB PM Time Questions

[rcbuck at atcelectronics.com]

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 <paulswedb at gmail.com>
Date: Wed, August 19, 2020 1:15 pm
To: Discussion of precise time and frequency measurement
<time-nuts at lists.febo.com>

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.

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