Re: [Discuss-gnuradio] Cannot Change USRP Interpolation Rate Dynamically
Hi Michael, > Michael Dickens-2 Wrote : > If you have time (I don't for a few weeks), could you please > enter it in as a new bug ticket? Try out the script from the link, > and see if it doesn't work for you. I used your code http://www.nabble.com/file/p15502528/test.py test.py and recorded the spectrum picture as shown in : 1) When the TX started (before changing the interpolation rate Dynamicly) : http://rapidshare.com/files/92067855/before.JPG 2) After changing it (after the 15 seconds) : http://rapidshare.com/files/92068144/after.JPG > If this script shows what you've found, please also enter it in the > ticket. I will do it. Regards, Firas A. -- View this message in context: http://www.nabble.com/Cannot-Change-USRP-Interpolation-Rate-Dynamically-tp15495473p15502528.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Cannot Change USRP Interpolation Rate Dynamically
Firas - This is a known bug, but I don't think it ever made it into the bug tracker. See the threads from < http://lists.gnu.org/archive/html/discuss-gnuradio/2007-10/msg00159.html >. If you have time (I don't for a few weeks), could you please enter it in as a new bug ticket? Try out the script from the link, and see if it doesn't work for you. If this script shows what you've found, please also enter it in the ticket. - MLD ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Cannot Change USRP Interpolation Rate Dynamically
Hi, It seems that there is a bug in gnuradio 3.1.1 (and up to today latest truck revision) in the USRP rbf standard file. When trying to change the interpolation rate dynamically, the output get distorted badly even if the program restore the started interpolation value. I have an old gnuradio 3.0.3 (Revision 6082) which does not have this problem at all. Checked with two RFX2400 boards, the same problem (it is an FPGA Problem). To check this , start the test (for example) with interpolation rate 128 and change it dynamically to 16 (it will be badly distorted). Now, try to restore it back to 128, and you will see that it stacked at the 16 with distorted waveform. Best Regards, Firas -- View this message in context: http://www.nabble.com/Cannot-Change-USRP-Interpolation-Rate-Dynamically-tp15495473p15495473.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
