[time-nuts] WWVB paper in May 2014 IEEE communications...

Bob Camp kb8tq at n1k.org
Sat May 31 16:10:28 EDT 2014


Hi

They tested the modulation format they now are using back in 2013. If they also tested the other formats that was done for a very brief period of time. I would think that knowing the transmission schedule of the various formats would be an important input into the chip’s design. More or less, you want to put it to sleep when the format you are after is off the air.

Bob

On May 31, 2014, at 2:22 PM, Scott Newell <newell+timenuts at n5tnl.com> wrote:

> At 08:01 AM 5/31/2014, Bob Camp wrote:
>> Hi
>> 
>> Well that's a bit more information. We seem to be missing the deployment schedule on the other new modulation formats. I kind of doubt that the watch and clock guys are going to start the fabs turning out millions of chips until they can test all the formats.
> 
> http://www.eversetclocks.com/press
> http://www.eversetclocks.com/receivers
> 
> They claim to have shipped samples back in 2013, with production slated for Q3. I can't find anyone selling them.
> 
> Is anyone recording or decoding the new phase modulation? If so, what are you using?
> 
> I'm trying to measure WWVB signal quality with an old radio clock tied to a PC parallel port. Maybe I should ask for a sample of the ES100 or ES200 to compare.
> 
> More modulation details:
> http://www.nist.gov/pml/div688/grp40/upload/NIST-Enhanced-WWVB-Broadcast-Format-1_01-2013-11-06.pdf
> 
> 
> -- 
> newell  N5TNL 
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