[time-nuts] new WWVB BPSK dev board

[David G. McGaw]

It does a very good job of pulling the signal out of the noise.  It 
works in NH, traditionally a fringe region, in all but the most shielded 
of rooms.  I also had occasion to test it for Everset in Kangerlussuaq, 
Greenland.  I found it had no trouble acquiring at any time of the day.  
If the ES100 does not do well enough for you, there is supposedly an 
ES200 available that uses a longer sequence for even more sensitivity.

The one thing I wish is that there were access to the synchronized 
analog signal and/or a 1PPS.  Even a top of the minute would be useful.  
It only has the I2C digital interface.

73,

David N1HAC


On 12/4/18 11:35 AM, Tim Shoppa wrote:
> Thanks for the heads up Tom! I ordered one and if it comes before the end
> of the year I may have some time over the holidays to do acquisition test
> from Maryland and maybe some cross-comparison with GPS PPS.
>
> Here in Maryland I have somewhat unreliable reception on commercial
> non-BPSK WWVB clocks at my house. My Casio Waveceptor watch is 99%+
> reliable when I'm asleep on the 2nd floor but much less likely to work in
> the basement. I can reliably hear the amplitude-keyed WWVB carrier on a LF
> receiver with a homebrew loop (about 3 foot by 3 foot) in the evenings but
> it takes some imagination to think I can hear it during the daytime.
>
> Tim N3QE
>
> On Mon, Dec 3, 2018 at 9:12 PM Tom Van Baak <tvb at leapsecond.com> wrote:
>
>> At long last, a complete WWVB 60 kHz BPSK dev board is available:
>>
>>
>> https://universal-solder.ca/product/everset-es100-cob-wwvb-60khz-bpsk-receiver-kit-with-2-antennas/
>>
>> Note it includes the antenna(s). Also has links to documentation.
>>
>> It would be very nice if a bunch of time nuts around the country played
>> with these and reported results.
>>
>> Prior to this, the only device that you could buy which used the enhanced
>> WWVB format was the La Crosse 404-1235UA-SS UltrAtomic clock. It was not
>> developer friendly, so a dev board with the Everset ES100 chip is good news.
>>
>> The maker / hacker / Arduino crowd may enjoy a fresh source of accurate
>> time; something independent of GPS or NTP. Some technical postings about
>> reception quality, acquisition speed, and timing precision would be most
>> welcome.
>>
>> /tvb
>>
>>
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