RECOMMENDATION ITU-R BS.559-2 - Objective measurement of radio-frequency protection ratios in LF, MF and HF broadcasting
1 Objective measuring method
    1.1 Principle
    1.2 Output measurement
    1.3 Noise signal for modulating the signal generators
    1.4 Measuring arrangements
    1.5 Depth of modulation of the test transmitters
    1.6 Audio-frequency signal-to-interference ratio
    1.7 The radio-frequency level of the wanted signal at the receiver input
    1.8 Influence of non-linear distortion in the signal generators
    1.9 Accuracy
2 Numerical method
    2.1 Principle
    2.2 Accuracy and limits of the method