Post date: 2017/02/12 5:10:30
$ dmesg ...usb 1-1.5: new high-speed USB device number 7 using dwc_otg usb 1-1.5: New USB device found, idVendor=0bda, idProduct=2838 usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1.5: Product: RTL2838UHIDIR usb 1-1.5: Manufacturer: Realtek usb 1-1.5: SerialNumber: 00000001 ...$ lsusb Bus 001 Device 007: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T $ rtl_test Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Found Rafael Micro R820T tuner Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 Sampling at 2048000 S/s. Info: This tool will continuously read from the device, and report if samples get lost. If you observe no further output, everything is fine. Reading samples in async mode... ^CSignal caught, exiting! User cancel, exiting... Samples per million lost (minimum): 0 $ gqrx linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown gr-osmosdr 0.1.3 (0.1.3) gnuradio 3.7.5 built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy pulseaudio/pa_sink.cc: pa_simple_new() failed: Connection refused Could not resolve property : pattern10600 ... ############################# $ sudo gpasswd -g pulse-access pi $ pulseaudio --start $ gqrx OK だが raspberrypi 2B で load 97% ?? $ rtl_fm -f 83.3M -M wbfm -s 200000 -r 48000 > test.wav $ aplay -r 48k -f S16_LE test.wav