RTL-SDR

sudo apt install rtl-sdr
sudo apt install usbutils alsa-utils

echo 'blacklist dvb_usb_rtl28xxu' | sudo tee /etc/modprobe.d/blacklist-rtl-sdr.conf
sudo reboot

dmesg

## [ 1000.391114] usb 1-1.3: new high-speed USB device number 5 using dwc_otg
## [ 1000.503089] usb 1-1.3: New USB device found, idVendor=0bda, idProduct=2838, bcdDevice= 1.00
## [ 1000.503170] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
## [ 1000.503197] usb 1-1.3: Product: RTL2838UHIDIR
## [ 1000.503251] usb 1-1.3: Manufacturer: Realtek
## [ 1000.503281] usb 1-1.3: SerialNumber: 00000001

lsusb

## Bus 001 Device 001: 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
## [R82XX] PLL not locked!
## 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...
## Allocating 15 zero-copy buffers
## lost at least 32 bytes

rtl_fm -M wbfm -f 80.0M -s 200k -r 48k - | aplay -r 48000 -f S16_LE -t raw -c 1
rtl_fm -M wbfm -f 79.5M -s 200k -r 48k - | aplay -r 48000 -f S16_LE -t raw -c 1
rtl_fm -M wbfm -f 78.0M -s 200k -r 48k - | aplay -r 48000 -f S16_LE -t raw -c 1

## Playing raw data 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
## Found 1 device(s):
##   0:  Realtek, RTL2838UHIDIR, SN: 00000001
## 
## Using device 0: Generic RTL2832U OEM
## Found Rafael Micro R820T tuner
## Tuner gain set to automatic.
## Tuned to 80316000 Hz.
## Oversampling input by: 6x.
## Oversampling output by: 1x.
## Buffer size: 6.83ms
## Allocating 15 zero-copy buffers
## Sampling at 1200000 S/s.
## Output at 200000 Hz.

rtl_tcp -a 0.0.0.0 -p 1234 -s 1024000

## Found 1 device(s):
##   0:  Realtek, RTL2838UHIDIR, SN: 00000001
## 
## Using device 0: Generic RTL2832U OEM
## Found Rafael Micro R820T tuner
## [R82XX] PLL not locked!
## Tuned to 100000000 Hz.
## listening...
## Use the device argument 'rtl_tcp=0.0.0.0:1234' in OsmoSDR (gr-osmosdr) source
## to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).

https://www.rtl-sdr.com/
https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/

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