On May 2, 2012 4:13 PM, "Gary E. Miller" <gem@rellim.com> wrote:
>
> Yo tz!
>
> On Wed, 2 May 2012 07:09:09 -0400
> tz <tz2026@gmail.com> wrote:
>
> > SkyTraq has a different version of the 638 (not just different
> > firmware) that emits corrections to the pps edge to go to 10nS, and
> > after a lock it will work down to 1 satellite and maintain accurate
> > pps.
>
> Got a model #?

Venus638LPx-T

http://www.skytraq.com.tw/products/Venus638LPx-T_PB_v2.pdf

They have an evk that goes to a serial usb but has allmthe pins broken out,
and maybe they have a firmware sdk - I have it for the more common version.