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 <[email protected]> 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
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