Quick start RTL2832 USB SDR receiver on Linux
GQRX is popular for RTL-SDR receivers on Linux:
adduser $(whoami) plugdev apt install gqrx-sdr rtl-sdr librtlsdr-dev
You can also download the latest release of GQRX.
In GNU Radio Companion, look for the RTL-SDR Source block.
Test RTL2832 PLL Frequency range:
Output should be like:
Found 1 device(s): 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Found Elonics E4000 tuner Supported gain values (18): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0 43.0 45.0 47.0 49.0 Benchmarking E4000 PLL... E4K PLL not locked for 53000000 Hz! E4K PLL not locked for 2217000000 Hz! E4K PLL not locked for 1109000000 Hz! E4K PLL not locked for 1248000000 Hz! E4K range: 54 to 2216 MHz E4K L-band gap: 1109 to 1248 MHz
Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001 Using device 0: Generic RTL2832U OEM Detached kernel driver 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 [R82XX] PLL not locked! Sampling at 2048000 S/s. No E4000 tuner found, aborting. Reattached kernel driver
Record the entire passband ~ 2 MHz bandwidth, not just the demodulated audio. Example command:
rtl_sdr /tmp/cap.bin -s 1.8e6 -f 90.1e6
Press Ctrl+C to stop recording after several seconds so that your hard drive doesn’t fill up.
You can read the
cap.bin file in MATLAB, Python or GNU Radio.
is RTL-SDR recognized? Before and after inserting the RTL-SDR receiver into the USB port of your Linux PC, type:
should show Realtek device.
try a different, non-USB 3 port (USB 2).
/lib/udev/rules.d/60-librtlsdr0.rulesthat allows the RTL-SDR stick to be recognized upon USB plugin.
dmesgshould show dozens of messages with
RTL2832when the USB receiver is plugged in
Other popular programs for the RTL-SDR:
MATLAB RTL-SDR support has several examples and a free eBook. Matlab also supports USRP and PLUTO SDR hardware among others.
GNU Radio (start with GNU Radio Companion graphical SDR IDE)
apt install gnuradio
pyrtlsdr: pure Python wrapper for
librtlsdrand less bulky than GNU Radio.