[time-nuts] New WWVB format...

[John Ackermann N8UR]

Paul, I have a couple of Spectracoms running and have pretty decent WWVB 
signal strength here.  I'd be happy to test the hack.

John
----

On 9/26/2012 1:32 PM, paul swed wrote:
> I may have at least the spectracoms figured out. Its a hack and at least
> using my homebrew wwvb psk encoder seems to work. But its not a general
> purpose design. It will work with the fluke 207 and HP 117s but you have to
> have a base spectracom to hack.
> Technically speaking unattractive.
> But that said I am waiting for the real wwvb to send bpsk again to claim
> any victory. Its a real challenge on the east coast as compared to folks in
> the mid and central west areas that have produced answers...
> I will also say that over the last 6 months. John and I have hacked a lot
> of the "solutions". They do not fare well.
> Regards
> Paul
> WB8TSL/1
>
> On Wed, Sep 26, 2012 at 1:13 PM, Tom Van Baak <tvb at leapsecond.com> wrote:
>
>> For those of you who don't dare click on encrypted Yahoo URL's, the
>> original NIST link is:
>>
>>
>> http://www.nist.gov/pml/div688/grp40/upload/NIST-Enhanced-WWVB-Broadcast-Format-sept-2012-Radio-Station-staff.pdf
>>
>> Burt,
>>
>> My reading of the document(s) is that the new format will in fact allow
>> WWVB to be used as a frequency standard with even greater precision then
>> before, though not with unmodified legacy WWVB carrier receivers. My hope
>> is that one of you will produce a clever reference design for such a T&F
>> receiver make it available to the group. It sounds like a very fun DSP
>> project; one that we can all learn from. Bonus points for making it an
>> open-source Arduino shield. Making it work with both DCF77 and WWVB would
>> also be a plus.
>>
>> If nothing else, a well-documented hack for existing Spectracom and HP
>> WWVB receivers would be welcome. A third idea is a translator that receives
>> the new carrier format and re-transmits the old carrier format; that way no
>> mods need to be made to legacy WWVB receivers at all, regardless of age. It
>> would be similar to the way the G2G (GPS to GOES) translator worked. Extra
>> credit for adding back the 45 degree hourly phase shift.
>>
>> /tvb
>>
>> ----- Original Message -----
>> From: "Burt I. Weiner" <biwa at att.net>
>> To: <time-nuts at febo.com>
>> Sent: Wednesday, September 26, 2012 8:49 AM
>> Subject: [time-nuts] New WWVB format...
>>
>>
>>> I'm sure most of this group has seen the information put out by NIST
>>> regarding the changes to the WWVB format.  But, for those who may not
>>> yet have seen this, here's a link to it:
>>>
>>>
>> http://f1.grp.yahoofs.com/v1/cBhjUH41xVccWM9P8EU4JqzmFNevFgDUFkRcgfLyry1Rn3HqMV5iDqYDgsd2pM1-Vq3nhF9WERTjVF_WmRjAezjU9CCrAda_8RqV/NIST-Enhanced-WWVB-Broadcast-Format.pdf
>>>
>>> The results of this change will apparently no longer allow WWVB to be
>>> used as a high accuracy frequency standard signal.  This does not
>>> seem to be much of an issue considering the availability of the GPS
>>> signals all over the world.
>>>
>>> I use GPS as my frequency reference for my "Off-Air" broadcast
>>> frequency measurement service.  Some broadcast stations also use GPS
>>> as a reference for their transmitters.  I'm sometimes asked why I use
>>> GPS as a reference when it is not recognized by NIST as the U.S.
>>> Frequency Standard?  Other than explaining the capabilities of GPS as
>>> a reference, I don't have a real answer for their specific
>>> question.  I have publications from NIST showing the accuracies
>>> obtainable using GPS, but it still does not appear to be an
>>> "Official" U.S. Frequency Standard.  So, I guess my question is, when
>>> will NIST officially recognize GPS as, at least an alternate, U.S.
>>> Frequency Standard?  Have I missed something?
>>>
>>> Thanks,
>>>
>>> Burt, K6OQK
>>>
>>> Burt I. Weiner Associates
>>> Broadcast Technical Services
>>> Glendale, California  U.S.A.
>>> biwa at att.net
>>> www.biwa.cc
>>> K6OQK
>>
>>
>>
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