Return to Main Menu Return to RA Series Menu ==================== RECOMMENDATION 611-2 - PROTECTION OF THE RADIOASTRONOMY SERVICE FROM SPURIOUS EMISSIONS ANNEX 1 - Interference to the radioastronomy service from spurious emissions 1. Protection criteria for the radioastronomy service 2. Harmonic and intermodulation interference 3. Unwanted emissions from broadband modulation 4. Interference from satellite transmissions