Lesson 1: Spectrum & SDR Setup
Install and configure RTL-SDR, explore spectrum, and capture demodulatable signals.
Objectives
- Install RTL-SDR drivers and verify operation
- Use SDR# or GQRX to explore spectrum and identify signals
- Capture and demodulate FM broadcast in GNU Radio
Setup
# Windows (Zadig) zadig.exe # Replace Bulk-In, Interface 0 with WinUSB # Linux (udev rules) sudo apt install rtl-sdr gqrx-sdr rtl_test -t
GNU Radio FM Flowgraph
# Blocks RTL-SDR Source -> Low Pass Filter -> WBFM Receive -> Audio Sink