[time-nuts] What's available in the way of DSP for new WWVB?

[paul swed]

after the bpsk is removed true. I have done that. A simple RC filter and a
100K over 50ohm divider to get the signal to a reasonable level. Add a
coupling cap because all of the old receivers output a preamp voltage.

On Fri, Oct 9, 2020 at 11:35 AM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> For a full setup, you could do it a lot of ways. A setup of:
>
> Antenna -> front end -> ADC -> MCU -> D/A would be one approach. Various
> bits like a local clock also would get into the design. There are *many*
> other
> approaches.
>
> ==========
>
> There are a lot of D/A’s that will clock in the 100’s of KHz range. If you
> are only
> trying to come up with an analog of a WWVB signal the “10 bit” D/A’s found
> in
> some MCU’s would do the trick. In the setup above, the ADC would likely be
> harder to come up with than the DAC.
>
> Since you are only trying to come up with a carrier, the need for a D/A is
> not
> an absolute one. Taking a square wave of some sort and filtering it a bit
> would
> be adequate to drive most of these old WWVB receivers.
>
> Bob
>
> > On Oct 8, 2020, at 11:42 PM, Hal Murray <hmurray at megapathdsl.net> wrote:
> >
> >
> > I assume it needs an antenna, front end, and D/A.
> >
> > What's available in the way of D/A that's good for 60KHz?  Is the
> problem
> > easier if the D/A box has external clocking?
> >
> > --
> > These are my opinions.  I hate spam.
> >
> >
> >
> >
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