[time-nuts] WWVB for Time Nuts

Bob Camp kb8tq at n1k.org
Sat Aug 9 15:56:13 EDT 2014


Hi

Keep in mind that the patent(s) do not keep you from building a part for your own use. Regardless of what they do / do not patent, a TimeNut can still build (and use for themselves) what ever they wish.

————

Now, if you (after careful examination) believe that the privately held patents keep you from building a receiver for a Federally Funded service - talk to your elected representatives. They are the ones who can / will fire up a committee to look into this sort of stuff.  I think I would want to have some information on license costs before I made that phone call though. 

Bob

On Aug 9, 2014, at 1:49 PM, Brooke Clarke <brooke at pacific.net> wrote:

> Hi:
> 
> I've been reading papers by Yingsi Liang who works for Xtendwave and she seems to be the key person developing the new clocks.
> I've starting collecting info on my web page:
> http://www.prc68.com/I/Loop.shtml#PhaseMod
> I don't understand how Xtendwave can get patents when their work was partially funded by NIST?
> 
> There are different modes that have different frame times, the Long mode takes 17 minutes for each of: Time, DST/LY state & Date. That's to say it takes 51 minutes to get all three.  Since the modulation format is in complete words their receiver has a problem with the inaccuracy of common watch crystals.  This says that for those who have a stable LO it's much easier to receive the BPSK signal over the times needed (probably for all formats).
> 
> PS a new paper "Receiver Design of Radio-Controlled Clocks Based On The New WWVB Broadcast Format" came out a few days ago.
> 
> PPS I've been having fun with theodolites and have made a table "Accuracy of Visual Fixes" on my Navigation page with columns headed Time, Angle & Distance based on the Earth rotation at: http://www.prc68.com/I/Nav.shtml#Accuracy
> The idea is that a theodolite with some angular accuracy needs to be used with a clock that has a equivalent accuracy to get a position fix within some distance.
> 
> [OT] PPPS I'm also having fun looking at the pond water in my back yard.
> http://www.prc68.com/I/Labophot.html#Pond_Water
> 
> -- 
> Have Fun,
> 
> Brooke Clarke
> http://www.PRC68.com
> http://www.end2partygovernment.com/2012Issues.html
> http://www.prc68.com/I/DietNutrition.html
> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.



More information about the time-nuts mailing list