[hpsdr] coherent dual mercury receivers

[Chris Smith]

Hi

Some years ago - around 1996 I think - I was involved in developing a real-time data collection & recording system where the data had to be tagged with time supplied by a Trimble GPS receiver. I can't, at this distance in time, remember what model of Trimble was used but it was easily possible to read the time of the rising edge of the PPS signal to sub +/-10nS accuracy. The customer was able to verify this - I don't remember how, if I ever did know.

Don't know if that helps any.

Cheers

Chris G4NUX

On 14 Mar 2011, at 18:45, Joe Martin K5SO wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> 
> To be fair to the Garmin engineer whose statement I referenced, my inquiry to him (several years ago now, actually) was in regard to a very specific Garmin GPS receiver module, their GPS-25.
> 
> After examining some of the documents available on the web regarding more sophisticated GPS receivers I see that it is indeed possible to obtain higher 1PPS accuracy than 1 uSec with some receivers but that the accuracy greatly depends upon the particular GPS receiver that is being used.  If the designers paid particular attention to deriving a highly accurate 1PPS signal then you're home free;  otherwise, let the user beware!
> 
> Thanks for the comments!  I learned something as a result.
> 
> 73,  Joe K5SO
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/
> 


 1300141447.0