Thread died off is it still going?
On Thu, Aug 18, 2011 at 6:32 PM, Magnus Danielson < mag...@rubidium.dyndns.org> wrote: > On 18/08/11 23:49, k4...@aol.com wrote: > >> Hi Magnus, thanks for that information. I had forgotten about that >> Plessey GP2010 and GP2015 RF chip. The only problem is that you have to >> do a divide by 7 on the 40 MHz signal that Plessey did in the GP2021 >> correlator IC. Using an old SuperStar RX is a good reconmendation. >> Thanks. Doug, k4cle. >> > > There is a whole little line of GPS receivers of the same chips. > > Hacking in external clock onto a SuperStar isn't all that hard. > > You will not have to do the divide by 7 in this case, For this application > you get 35,42 MHz out in the second filter stage, just tap in on that with a > diffrential pair after the filter and you are essentially done. In the > GP2010/2015 topology it goes back in for AGC and sampler action. If your > receiver expects the 35,42 MHz signal, it gets inserted into that place from > a receiver buffer with filter and then the rest of the analog and digital > path is continued... that's how they use up two GP2010/2015 chips, but can > get away with longer cable runs since the damping of 35,42 MHz is much less > than that of 1575,42 MHz in RG-58.... > > > Cheers, > Magnus > > ______________________________**_________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.