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Rtlizer

Rtlizer is a simple spectrum analyzer application written using rtlsdr, kiss_fft and Gtk+. It was originally created as a Beaglebone + rtlsdr demo, but it will probably run on anything with rtlsdr and Gtk+ installed, including a Raspberry Pi equipped with an Adafruit piTFT display.

<a href="http://www.flickr.com/photos/csete/8474999050/" title="Beaglebone rtlizer"><img src="http://farm9.staticflickr.com/8385/8474999050_4d418b232d.jpg" width="500" height="254" alt="Beaglebone rtlizer"></a>

<a href="https://www.flickr.com/photos/csete/15918779698" title="Rtlizer running on the Raspberry Pi by Alexandru Csete, on Flickr"><img src="https://farm9.staticflickr.com/8572/15918779698_70a4b6bdc0.jpg" width="500" height="238" alt="Rtlizer running on the Raspberry Pi"></a>

You can see a short video demo on YouTube: https://www.youtube.com/watch?v=jzmFXreuFR4

Dependencies

• rtlsdr (requires libusb-1.0)
• Gtk+ v3
• kiss_fft (included)

Building

The source code is located in the src/ subdirectory. You can imply type "make" in this directory and the program should build on any platform where the dependencies are met. The build process will generate a single executable called rtlizer and you can copy this to a location of your choice.

Instructions for setting rtlizer up on specific targets are available for:

• Beaglebone running Debian 7 console image

Usage

You can basically run rtlizer as is in any X11 environment. The default window size is set to 320x240 but can be overridden using X Window System geometry string, e.g.

rtlizer 640x360+0+0

There are also other command line options are available, see rtlizer -h.

You can use the following keys while rtlizer is running:

LEFT    Increase frequency
RIGHT   Decrease frequency
UP      Increase sample rate
DOWN    Decrease sample rate
ENTER   Exit

Credits

Rtlizer was written by Alexandru Csete. Uses code from rtl_test by Steve Markgraf. Includes kiss_fft by Mark Borgerding.