[time-nuts] WWVB for Time Nuts
ijcousins at frontier.com
Sat Aug 9 17:42:38 EDT 2014
Here is a prediction of how it could go on the WWVB chip situation.
Moors law will under price the custom chip price in small (and even
It already has.
A WWVB receiver can now be done on an Arduino microprocessor with a
little help from an antenna.
The custom chip price will loose this battle.
The custom chip takes longer to develop.
A simple download can upgrade a simple carrier tracking receiver to a
full demodulating receiver.
The web site that supplies that free software upgrade can be anywhere on
For lawyers to do their job they need a target.
Do not give them a target to aim at.
Or give them so many targets that they still can not do their job.
The antenna-receiver-Arduino board can be made in China and purchased on
I feel sorry for the team with patent(s), they are competing against the
whole world, and do not know it yet.
This is a prediction of how it could happen.
On 8/9/2014 12:56 PM, Bob Camp wrote:
> 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.
> On Aug 9, 2014, at 1:49 PM, Brooke Clarke<brooke at pacific.net> wrote:
>> 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:
>> 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.
>> Have Fun,
>> Brooke Clarke
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