DangerousPrototypes has just posted a link to a newer SDR application named REDHAWK. The REDHAWK GitHub page describes the project as, “REDHAWK is a software-defined radio (SDR) framework designed to support the development, deployment, and management of real-time software radio applications. For software that makes use of the rtl-sdr software library, download libusb. Extract the appropriate 32 or 64 bit version of libusb-1.0.dll and place it in the application folder. Do not copy it to your Windows folder. It's an application DLL, not a system DLL. One bad actor installs an old version of libusbx (1.0.8) in a Windows system folder. The rtl-sdr project page Source of the rtl-sdr driver software and hub for its continued development. Zadig does a lot of work behind-the-scenes like copying the appropriate drivers, creating an INF file, and adding registry entries so rtl28388uhidir the numerous layers of Windows can find everything each time your USB stick is plugged into a. The GNSS-SDR software receiver can be configured to use the RTL2832U as a real-time signal source, thus providing a low cost option (about 20 € or $25) to build a real-time software defined GPS L1 receiver. This article introduces the operation details and some performance measurements regarding this GNSS-SDR.
GQRX is popular for RTL-SDR receivers on Linux:
You can also download the latest release ofGQRX.
In GNU Radio Companion, look for the RTL-SDR Source block.
Test RTL2832 PLL Frequency range
Output should be like:
Note, this is the entire passband ~ 2 MHz bandwidth, not just the demodulated audio.Example command:
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
Here are 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)
pyrtlsdr: pure Python wrapper for
librtlsdrand less bulky than GNU Radio.
Zadig: Driver Installation
These brief instructions describe how to install an RTL2832U TV tuner stick on your Windows PC. Your version of Windows must be XP SP3 or later. Microsoft does not support WinUSB on Windows 2000 or NT (and don't even ask about 9X/ME).
- Boot up Windows and plug your RTL stick into an open USB slot.
- Run Device Manager to verify that Windows has found the device.
- Download Zadig from here.
- Run Zadig to associate Microsoft's WinUSB driver with the device.
- Choose WinUSB and click 'Install Driver'.
- At this point, you should be able to test programs like SDR# and Unitrunker with your RTL stick.
Device Manager shows us what devices are attached and in what state. However, later versions of Windows made it harder to navigate to the right place to run Device Manager.
This works with Windows 8.1 (only):
Press the pair [Windows]+X where [Windows] is the Windows key and X is the 'X' key. A context menu will appear. Click 'Device Manager'.
For XP, Vista, 7, and 8.0:
Press the pair [Windpws]+R where [Windows] is the Windows key and R is the 'R' key. A popup dialog will appear prompting you to type a command or program name. Type 'control' and press return. This will run the control panel. From the control panel, click 'Hardware and Sound'. Under 'Devices and Printers', select 'Device Manager'.
There are two versions of Zadig. If you have Windows XP, you should download the XP version and read this.
Zadig does a lot of work behind-the-scenes like copying the appropriate drivers, creating an INF file, and adding registry entries so that the numerous layers of Windows can find everything each time your USB stick is plugged into a USB slot.
Zadig offers three choices - WinUSB, libusb0, and libusbK.
My only gripe with Zadig is it does not clean up after itself. It you re-install a driver (or swap out drivers), the old INF files are still there (more on this later).
After Zadig points Windows to the correct driver, you should see this:
For software that makes use of the rtl-sdr software library, download libusb. Extract the appropriate 32 or 64 bit version of libusb-1.0.dll and place it in the application folder. Do not copy it to your Windows folder. It's an application DLL, not a system DLL. One bad actor installs an old version of libusbx (1.0.8) in a Windows system folder, breaking programs that expect latest version (1.0.18 as of this writing).
Zadig For Windows 10
The following information may help advanced Windows users:
The INF file installed by Zadig goes in your WindowsInf folder and looks something like:
The actual file is longer. The above text should be enough to help you recognize it. The file is named 'OEMxx.inf' where xx is a number that increases each time you run Zadig. The old INF file isn't removed. Zadig also adds keys to the registry that point to this file.
Look under HKEY_LOCAL_MACHINESYSTEMCurrentControlSetEnumUSB for a list of VID/PID pair registry keys. See the device ID in the INF above? The key will have a similar name. Your device may have a different VID and PID value. Under that key will be another key that is the eight digit serial number of your RTL stick. Using one of my sticks as an example:
Under this key are a dozen or so values. The Mfg and DeviceDesc values point to our INF file above. For example:
Suppose you accidentally installed the actual FM + DAB TV drivers that normally ship with these devices? Your INF file will look something like:
Rtl Sdr Driver Install
Notice the 'Vender' typo. This INF loads the drivers meant for watching TV. If you're reading this page, probably not what you want.
Before mucking around with the registy and Windows folders; try un-installing the device from device manager. Plug the RTL stick into each USB slot and repeat - just to be sure. Once you're satisfied the un-wanted driver(s) are gone - reboot.
As always - when mucking around with Windows Registry settings and Windows system folders - create a Windows Restore Point and backup of the registry before any changes. Good luck.