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rtl-sdr turns your Realtek RTL2832 based DVB dongle into a SDR receiver

For more information see: http://sdr.osmocom.org/trac/wiki/rtl-sdr

This repository https://github.com/n1gp/librtlsdr was forked from https://github.com/steve-m/librtlsdr. It's purpose is to add the rtl_hpsdr application and allows building it for Windows or Linux.

See http://www.staniscia.net/1023-how-to-build-rtl-sdr-on-windows-x64 for an example on how to build on Windows.

For Linux:

mkdir build cd build cmake .. make

WIP - Config

Kernel module

/etc/modprobe.d/rtlsdr.conf blacklist dvb_usb_rtl28xxu

The important parts are "0bda" (the vendor id) and "2838" (the product id).

Create a new file as root named /etc/udev/rules.d/20.rtlsdr.rules that contains the following line:

SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", GROUP="adm", MODE="0666", SYMLINK+="rtl_sdr"

Direct Sampling for HF

rtl_eeprom Found 1 device(s): 0: Generic RTL2832U OEM

Using device 0: Generic RTL2832U OEM Found Rafael Micro R828D tuner

Current configuration:

Vendor ID: 0x0bda Product ID: 0x2838 Manufacturer: Realtek Product: RTL2838UHIDIR Serial number: 00000001 Serial number enabled: yes IR endpoint enabled: yes Remote wakeup enabled: no

Forcing Direct Sampling To be Always ON

In some cases you may want to force direct sampling to be always on. For example, not all programs expose the direct sampling controls to the user, so in those programs it can be impossible to turn direct sampling mode on. To force it on, use our RTL-SDR-Blog driver branch, and use set the direct sampling always on flag in the EEPROM with the command "rtl_eeprom -q y". To disable forced direct sampling do the opposite command "rtl_eeprom -q n"

./src/rtl_eeprom -q y Found 1 device(s): 0: Generic RTL2832U OEM

Using device 0: Generic RTL2832U OEM Found Rafael Micro R828D tuner

Current configuration:

Vendor ID: 0x0bda Product ID: 0x2838 Manufacturer: Realtek Product: RTL2838UHIDIR Serial number: 00000001 Serial number enabled: yes Bias-T Always ON: no Direct Sampling Always ON: no

New configuration:

Vendor ID: 0x0bda Product ID: 0x2838 Manufacturer: Realtek Product: RTL2838UHIDIR Serial number: 00000001 Serial number enabled: yes Bias-T Always ON: no Direct Sampling Always ON: no

Write new configuration to device [y/n]? y

Configuration successfully written. Please replug the device for changes to take effect.

Configuration of local IP and container

...

Link with docker-cwskimmer configuration

...

Starting in container:

he standard Osmocom version of rtl_tcp only allows for direct sampling on the I-branch, which is useless as we need direct sampling on the Q-branch. Please see our RTL-SDR-Blog Drivers for a version that includes a -D direct sampling flag. The Releases page has a Windows release.

./src/librtlsdr/build/src/rtl_hpsdr -i 172.17.0.3 -d 2

better after configured once

./src/librtlsdr/build/src/rtl_hpsdr -i 172.17.0.3 -d 3

Building

  • make -B -f Makefile.docker build