-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm afraid you can't reduce needed sample rate for a fixed bandwidth.
You need a stronger laptop. Often, plugging it into mains power helps. Marcus On 31.03.2014 17:52, Nasi wrote: > ohhh, now I understand. It produces UUUU in the transmitter side - > which probably means underflow with my laptop. Do you know how to > decrease this power? > > > > Mon, 31 Mar 2014 08:44:49 -0700 (PDT) ?? Bogdan Diaconescu > <b_diacone...@yahoo.com>: >> For dvbt the bandwidth is around 9.14Msps so with the rational >> resampler you need to set-up the USRP at 10Msps. 1Msps will not >> work as only a part of the spectrum will be received. >> >> Bogdan >> >> >> On Monday, March 31, 2014 6:36 PM, Nasi <nesaz...@mail.ru> >> wrote: Hi, >> >> Thanks! >> >> I am using collected data also as > you say. >> I am using sampling rate of 1 Mbps instead of 10 Mbps which must >> be the same for static transmission. Isn't it? >> >> >> >> >> Mon, 31 Mar 2014 08:23:01 -0700 (PDT) ?? Bogdan Diaconescu >> <b_diacone...@yahoo.com>: Hi, not having access to my setup for >> now but for the beginning you could try recording the spectrum >> with your USRP and then use the file source to decode the signal >> offline. There is a script file apps/capture.sh that I usually >> use to capture data. You may tweak it for your needs (frequency, >> gain). >> >> Sometimes it was reported that on old cpus the processing power >> is not enough so that the result is an overflow (you directly see >> a long OOO message in this case). Try to see if this is the >> case. >> >> One way to reduce the overhead is to run the receiving flow >> directly from command > line instead of gnuradio-companion (e.g. ./top_block > out.txt) > after you have generated the flowgraph. The gnuradio-companion > cannot cope with big amount of data when the blocks gets out a lot > of text. >> >> Bogdan >> >> >> On Monday, March 31, 2014 1:22 PM, Nasi <nesaz...@mail.ru> >> wrote: Hi all, >> >> I am using ubuntu 13.04, GNURADIO 3.7. I cannot transmit or >> receive using two (USRPN200 + XCRV2450 d.board+VERT2450 antennas) >> devices for DVB-T project. Here is the dvb-t project: >> https://github.com/BogdanDIA/gr-dvbt >> >> It will be very helpful and appreciated if you help me. If >> someone tested it or can do it, please let me know. As far as I >> know someone tested it with N210 model. >> >> I think this failure is due to high noise/interference or smt. >> else. However I tested it already with all possible >> configurations. I also attach my .grc files. >> >> >> -- NE _______________________________________________ >> Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >> >> >> -- NE >> >> > > > > > _______________________________________________ Discuss-gnuradio > mailing list Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTOZDPAAoJEBQ6EdjyzlHtDWwIALcmUMVs7Rrx/WdFtqJ//Fxn tzMvsVrDOKBu+5AnmmbVZ20dVulN2lcZ25vZScpFYKOAbe5TwRy2XTsFODHItGNF dhmyOQNLVArDSSQuWTLSnMODKEUMCgU/sxyDtal0SVz6KuCSjjwP/exgaKHtNweU tQid+PdH0JTZ/5iqvtQyHJhwy0rcl0RIK8ig0MXhoQG8IQVl2lKZXUtlOle1wMsC w5oed0uop0d1J4bWDxC3oBRd6DfSCLx9avXtCHEFdgiAZSkFPva0XhJbimm3K8GP V6qzH2S29eojRZYQHqlWxy8ISMG8SCr0Ii2joHv6iESCB9cgK1KkWrECMc0Ltvk= =HjFO -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
