GR World Challenges example flowgraphs

5 examples you can open and run in the browser, with no GNU Radio installation.

• Challenge 09 blocks
• Challenge 1Add a Frequency Sink of your own, then look at a square wave in the frequency domain.
• Challenge 2Wire a slider to a block parameter, then tune the tone to 100.25 MHz while the flowgraph runs.
• Challenge 3Filter out an interferer, decimate what is left, and tell the display about the new sample rate.
• Challenge 4Multiply by a complex sine wave to slide a signal down to 0 Hz -- the move every SDR receiver makes.