Hi Alex:
There's not a requirement that Xtgendwave make the chip. The modulation format is published by NIST and anyone can make
a receiver.
I would hope there's some Time Nuts that would be interested in doing this rather than trying to remove the phase
modulation.
It's my understanding that by using the fast (100 bits/second - 10 second frame time) signal you can get more precision
than possible using the old WWVB signal.
Note: The Xtgendwave patents spend a lot of time and effort compensating for the poor quality of the watch crystal. If
it's in spec but not exactly on frequency, then decoding a signal that's 17 minutes long is a big problem. For time
nuts use where we have a precision LO all that goes away and instead we could be looking at how to get more precision
and at the same time more updates.
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Alexander Pummer wrote:
Hi Brooke,
I hope that you are right with that chip, and despite the name change of the company -- now Xtendwave -- and
recovering they will deliver something some times. I can see that with correlation and averaging schemes the signal
to noise ratio of data, perhaps constant frequency could be improved, but I would be very interested to see of the
mathematical model of improving the signal to noise ratio of timing.
Regards
Alex
On 9/23/2014 1:08 PM, Brooke Clarke wrote:
Hi Alex:
Sometime in the future there will be chips that will decode the new signals (note the "s" on the end of that last
word). There are a number of frame times the longest one of which takes 17 minutes and is transmitted only once per
day. This format offers 23 dB modulation gain compared to the 1 minute time frame transmission that the current
clocks use. There are a total of 5 different modulation formats that will be transmitted over different time
frames. In the end everyone should have a clock with more frequent updates (on the West coast I might need to wait
overnight for a clock to sync after a battery change) and more accuracy.
http://prc68.com/I/Loop.shtml#PhaseMod
Have Fun,
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