[Discuss-gnuradio] USRP external clocking outdated documents
Hi, USRP external clocking documents are outdated so I could not find answer to my questions. I modified the USRP board for external clock input, but which parameters should I change in the code for a different clock frequency (10MHz). I guess in python I can set it by writing self.u.set_fpga_master_clock_freq(1000) but I guess more files should be edited(I am using basic rx). I am having some hard times with this so if you could help I will really appreciate it Thank you in advance. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP external clocking outdated documents
That is pretty much everything you need to do. I'm using a 60 MHz clock and calling set_fpga_master_clock() modifies the main master clock variable, which is used in the tuning of the DDC and also most (if not all) of the daughterboard drivers query this as well. I've tested this using BasicRX, LFRX and WBX. juha On Mon, Oct 25, 2010 at 10:47, Burak TUYSUZ buraktuy...@gmail.com wrote: Hi, USRP external clocking documents are outdated so I could not find answer to my questions. I modified the USRP board for external clock input, but which parameters should I change in the code for a different clock frequency (10MHz). I guess in python I can set it by writing self.u.set_fpga_master_clock_freq(1000) but I guess more files should be edited(I am using basic rx). I am having some hard times with this so if you could help I will really appreciate it Thank you in advance. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] USRP External clocking
Hi All, Is any modification needed to the USRP board to use an external clock generator instead of the on board 64MHz one? Thanks! [WM] ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP External clocking
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Aug 18, 2008, at 10:43 AM, Dan Halperin wrote: http://gnuradio.org/trac/wiki/UsrpFAQ/Clocking And there is another way of clocking if you want to solder on an SMA connector instead, connect an external clock, and disable the onboard clock. http://gnuradio.org/trac/wiki/USRPClockingNotes - -Dan -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.8 (Darwin) iEYEARECAAYFAkipthgACgkQy9GYuuMoUJ5PSACgj61nk3KZwvUIQE/6M/J+Qvgo z4kAoMwys1a1nSCnVr1Sp/ziLGQdRE83 =fbpq -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] USRP External clocking
Hi Dan, Thank you for the links. I already did that research, so I could have written my email differently... I just wanted the confirmation that all the following modifications are required to use an external clock source (In the Wiki is on the section about connecting multiple USRP boards so I just want to be sure...) - Solder an SMA connector into J2001. This is the clock input. - Move R2029 to R2030. This disables the onboard clock. R2029/R2030 is a 0-ohm resistor. - Move C925 to C926. - Remove C924. Thank you! [WM] On Mon, Aug 18, 2008 at 1:43 PM, Dan Halperin [EMAIL PROTECTED]wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Aug 18, 2008, at 9:10 AM, Wireless Monster wrote: Is any modification needed to the USRP board to use an external clock generator instead of the on board 64MHz one? A trivial search of the Wiki, or the mailing list, should be executed before simple and common queries like this. wiki search: http://gnuradio.org/trac/search mailing list via Nabble: http://www.nabble.com/GnuRadio-f1878.html (the answer is in a FAQ on Wiki and all over the mailing list) http://gnuradio.org/trac/wiki/UsrpFAQ/Clocking - -Dan -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.8 (Darwin) iEYEARECAAYFAkiptL8ACgkQy9GYuuMoUJ6CJACfW5Id0MDNfmt0nfy3yqBj WLIAnjCko/jL70MR/tQ3UMb04A3NYwFf =0GG4 -END PGP SIGNATURE- ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
