On Fri, Sep 25, 2009 at 04:36, David I. Emery <d...@dieconsulting.com> wrote: > On Fri, Sep 25, 2009 at 12:00:34AM +0400, Alexander Chemeris wrote: >> Power will be taken from USRP 6V, clock output will be SMA to >> connect to USRP directly. Frequency control will be accessible >> over RS-232 (aka COM-port) with simple text-based protocol. We're >> going to use ATMega for this. Ideally we want tighter integration >> with USRP, so it can be controlled via the same USB connection, >> so you can control clocks right from GnuRadio. But to date we can't >> figure out how to do this cleanly. All suggestions are welcome. > > Have you any sense of how much additional phase noise - sampling > clock jitter - the ATMega will introduce compared to the TXCO Matt uses ? > This impacts SNR... especially with higher nyquist n subsampling.
We don't use ATMega for clock generation, it's used to control precise generator and as interface to PC only. -- Regards, Alexander Chemeris. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
