[time-nuts] NTP REFCLOCK for a Jackson Fury??

[Tim Shoppa]

Back in 2003 or so, in the Z3801A with hpgps ntpd refclock driver, I had to
add a negative offset of -0.98 seconds to the driver's decoding of
PTIME:TCODE? to get it to be right in combination with PPS refclock.

The documentation in the Z3801A manual correctly described the actual
behavior.... "PTIME:TCODE? Provides timecode message 980 to 20 ms prior to
1 PPS of indicated time".



On Thu, Oct 17, 2013 at 9:40 AM, Scott Mace <smace at intt.net> wrote:

> I posted a patch for the Fury to work with ntpd in Oct 2008.  It uses the
> GPGGA output.  The PTIME:TCODE? command is not "on-time" with the 1-PPS
> output on the Fury, so the HPGPS driver does not work.
>
> http://www.febo.com/pipermail/**time-nuts/2008-October/033901.**html<http://www.febo.com/pipermail/time-nuts/2008-October/033901.html>
>
> the ntp-fury.diff:
> http://www.febo.com/pipermail/**time-nuts/attachments/**
> 20081020/846021fe/attachment-**0001.bin<http://www.febo.com/pipermail/time-nuts/attachments/20081020/846021fe/attachment-0001.bin>
>
>
>         Scott
>
>
>
> On 10/16/2013 04:44 PM, Frank Hughes wrote:
>
>> Hi,
>>
>> What NTP REFCLOCK can be used for a Jackson Fury?
>>
>> I know that the Jackson Fury docs suggest using:
>> http://www.realhamradio.com/**gpscon-info.htm<http://www.realhamradio.com/gpscon-info.htm>
>>
>> But that means I would have to put up a windows server
>> to replace the FreeBSD ntpd server I built for use w/ the Trimble TB.
>>
>> Looking for open source options, if possible.
>>
>> Thanks,
>> Frank
>> KJ4OLL
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