Native. Open. Yours.

Welcome to the AetherSDR documentation. AetherSDR is an open-source, Linux-native client for FlexRadio Systems transceivers.

• Installation — Download and install on Linux, macOS, or Windows
• First Connection — Connect to your FlexRadio for the first time
• Building from Source — Compile AetherSDR yourself

• Panadapter Controls — FFT spectrum, waterfall, zoom, pan, display settings
• VFO Widget — Frequency display, sub-menus, slice management
• RX Controls — Filters, DSP, AGC, squelch, RIT/XIT
• TX Controls — Power, profiles, ATU, MOX, TUNE
• Multi-Slice Operation — Working with multiple VFOs
• TNF (Tracking Notch Filters) — Creating and managing notch filters
• Profile Management — Global, TX, and Mic profiles
• XVTR (Transverters) — Transverter setup and operation

• CW Decoder — Real-time Morse decode with confidence coloring
• RADE Digital Voice — FreeDV AI-based digital voice codec
• WSJT-X Integration — FT8/FT4 with rigctld CAT control
• CAT Control — Hamlib rigctld TCP and virtual serial ports

• SmartLink Setup — Operate your radio over the internet
• Manual Connection — Connect across routed networks without SmartLink

• Radio Setup — All settings tabs
• Firmware Update — Update radio firmware from Linux
• Audio Settings — Line out, headphone, PC audio devices

• DSP Noise Mitigation — Complete guide to all noise reduction features
• Multi-Flex — Operating alongside SmartSDR or Maestro
• NR2 Noise Reduction — Client-side spectral noise reduction
• Troubleshooting — Common issues and solutions

• Contributing Guide — How to contribute code and features
• AI-Assisted Development — Using Claude AI to contribute