[ntp:questions] Re: WWV audio driver, FreeBSD, Can't seem to get it going

David L. Mills mills at udel.edu
Tue May 24 13:59:55 UTC 2005


One thing I have not been able to evaluate is what happens when the WWV 
and WWVH signals are co-dominant. The mitigation algorithms look for 
each station separately and choose the maximum SNR; however, the cross 
correlation of the 1000-1200 Hz seconds tick is not definitive. See the 
report cited in the documentation. I have a PSTI (sic) 1020 here and it 
has only nominal filtering; however, it should be more than sufficient 
as a good receiver. The bottom line is that the sidetone produced by the 
driver should sound okay.


wa6zvp at gmail.com wrote:
> Dave,
> Early on, I was using the Traconix 1020, picking up a spot not too far
> from the
> AM detector.  Without a schematic, its hard to tell if any filtering
> has already
> taken place.  However, I observe it on a scope and I can pick out the
> seconds
> ticks and even see the 100 Hz.
> I have also had it on a Kenwood TS940 headphone jack.  Set for AM, no
> ability to put the 2.1 Khz filter on in that mode in this rig.  On the
> scope it
> looks about the same as the Traconix, maybe a tad less 100hz, but not
> by much.
> Out here on the left coast, we quite often here both WWv and WWVH on
> both 10Mhz and 15Mhz.  How does this effect the 5ms. ticks and the
> 100Hz.
> filters?  Most of the time one of them dominates by 6-10+db, but at
> times
> they are neck and neck.
>     Roger

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