not being able to get to my two dead 5370Bs is there enough clearance to allow for stacking capes ? If not the interface could be a 'horizontal' implementation. Another one that just came to mind is have holes that would allow one to put a metal can over the digital blocks / capes / boards. Holes would go to ground.
On Sat, Mar 1, 2014 at 11:02 AM, John Seamons <[email protected]> wrote: > > On Mar 2, 2014, at 7:05 AM, Pete Lancashire <[email protected]> > wrote: > > > Idea. On the next go around for the board put the copper down and holes > for > > a couple small daughter cards and any support logic needed to interface > > with the BBB. > > The the only additional cost would be limited to the daughter board I/O > > since my guess it would be SMT hence a bit hard to leave it unpopulated. > > Good idea. Also the Beagle spec allows for multiple, stacked interface > boards ('capes' they call them). So for a backwards compatible solution an > experimental GPSDO + backup power cape could be interposed between the > Beagle and 5370 board. I say experimental because I have no idea if any of > the SDGPS projects out there would be ultimately suitable for a DO. > > This brings up a question I have about how the PPS edge is actually > derived by a GPS receiver. Does it originally come from the NAV data stream > and then get corrected by the (fixed-mode) positioning solution to account > for transmission/system delays? I know about the issue of alignment with > the VCTCXO clock, but I'm talking about upstream of that. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
