Extracting GPS clock??

Hi, I have a GPS box based on the Sirf GPS1 chipset.

I'd like to tap in and get a stable clock signal out of it.
Rumors ar there's a 1pps, a 50Hz, and maybe other stable frequencies in
there.

I probed around with a scope but didnt see anything too stable, except
something around 1.1MHz.

Does anybody have the pinout of the GPS1 chip, or know which pins have good
cklocks on them?

www.sirf.com doesnt seem to have anything too techincal like, a chip data
sheet or anything useful like that.



Thanks,


George

"George R. Gonzalez" <grg2@comcast.net> wrote in
news:a0O1b.236487$Ho3.30182@sccrnsc03:

> Hi, I have a GPS box based on the Sirf GPS1 chipset.
>
> I'd like to tap in and get a stable clock signal out of it.
> Rumors ar there's a 1pps, a 50Hz, and maybe other stable frequencies
> in there.
>
> I probed around with a scope but didnt see anything too stable, except
> something around 1.1MHz.
>
> Does anybody have the pinout of the GPS1 chip, or know which pins have
> good cklocks on them?
>
> www.sirf.com doesnt seem to have anything too techincal like, a chip
> data sheet or anything useful like that.

You might want to ask this question in the "main" GPS-related
newsgroup, sci.geo.satellite-nav in case some of the more
technical people there aren't following this group.

--
Dave Patton
Canadian Coordinator, the Degree Confluence Project
http://www.confluence.org dpatton at confluence dot org
My website: http://members.shaw.ca/davepatton/
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