Dear experts, <I send this question to both GNU radio and USRP mailing lists. I do not know which is better place for this discussion.>
(1) Introduction I am Mamoru Yamamoto from Kyoto Univ. Some may know that I am doing satellite-beacon experiment by using USRP1 + GNU Radio. We call the receiver as GRBR (GNU Radio Beacon Receiver). http://www.rish.kyoto-u.ac.jp/digitalbeacon/ Sorry this web site is very old. Now I am using USRP1 + uhd + GNU Radio from python script Also I am using Ubuntu 12.04LTS. My application is a very simple dual-channel receiver recording IQ time-series on two files. The system is VERY stable and useful. I like it very much. (2) Current situation Now I try to move to Ver 3.7. (I installed the software by "build-gnuradio script".) Necessary small changes for me were -- "optfir.low_pass" location change -- "freq_xlating_fir_filter_ccf" location change & centerfrequency setting from negative to positive -- "file_sink" location change (3) Questions These changes were done. I now start running the system, but have problems. I have 2 questions. Q1: I run the modified code with Ubuntu-32bit 12.04LTS. My code worked for several times, but after that, it created only "0-byte" files (=immediate stop), and then no files were created. I checked the uhd status, and found that "uhd_find_devices" was successful while "uhd_usrp_probe" failed (see below). I now connect USRP1 to USB3 port. Is this wrong? Q2: I also tried to use the same V3.7 code with Ubuntu-64bit 12.04LTS. But output file from my code is always 0-bytes (=immediate stop). Please tell me if 64bit OS is useless. === Check after the problem (Q1) === beacon@Beacon-36:~/beaconRX$ uhd_find_devices linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.007.001-72-g383061d8 -------------------------------------------------- -- UHD Device 0 -------------------------------------------------- Device Address: type: usrp1 name: serial: 2R24X5U1 beacon@Beacon-36:~/beaconRX$ uhd_usrp_probe linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.007.001-72-g383061d8 -- Opening a USRP1 device... Error: RuntimeError: usb rx6 submit failed: LIBUSB_ERROR_IO ============================== Thanks for your help and suggestions. -- Mamoru Yamamoto / RISH, Kyoto University [email protected] Phone +81-774-38-3814, Cell +81-90-5653-7555 _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
