Your First Flowgraph

This tutorial will guide you through running your first flowgraph in GNURadio.

Starting GNURadio Companion

The GNURadio Companion (GRC) is a visual editor for assembling and flowgraphs. GRC uses .grc files which are then translated into Python .py flowgraphs. Start GRC by opening a terminal and typing:

$ gnuradio-companion &

Double click the Options block on the upper left hand corner and name your flowgraph by editing the Id and Title entries:

The Id will be the filename of the Python flowgraph which in this case will be sineWaveFlowgraph.py. The Title entry is a description of the flowgraph. Click OK and then click File : Save to save your GRC Flowgraph.

You will then need to enter a name for your .grc file which is sineWaveGRC.grc to distinguish it from the .py flowgraph.

Adding Blocks

GNURadio comes with a large pre-existing library of signal processing blocks.