[hpsdr] GPS 1PPS board

[Graham / KE9H]

Chris:

Although a cheap way to get started, this is a navigation receiver, not 
a timing receiver,
and it will not be a good choice for frequency control.  This one's spec 
is that the 1 pps
signal has a jitter spec of +/- 1 microsecond.  Timing receivers, such 
as the Motorola
Oncore UT+ have a timing mode, that provides jitter around +/- 50 
nanoseconds,
without sawtooth correction, and sub 10 nanoseconds with sawtooth 
correction.

You want a timing receiver, or a receiver with a timing mode option for 
frequency
control.

--- Graham / KE9H

==

Chris Salinas wrote:
> Hi All,
>  
> With Excalibur being designed, a good 10Mhz time-base is needed.
>  
> I came across (on Ebay) a Rockwell Jupiter board that could be used in 
> an accurate 10MHZ source.
>  
> http://cgi.ebay.com/Rockwell-Jupiter-12-channel-GPS-receiver-OEM-module_W0QQitemZ290306684157QQcmdZViewItemQQptZGPS_Accessories_Cables?hash=item290306684157
>  
> Here's a manual I came across:
>  
> http://www.gpskit.nl/documents/rockwell/jupiter-gps-board.pdf
>  
> Pin 19 on this board has the 1 PPS signal, so I wonder what it  would 
> take to integrate it into Gibraltar or come up with a 10 Mhz source 
> for Excalibur using this board.
>  
> There are over 900 boards from the source.
>  
> Chris N0TTW
>


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