The CCIR unanimously recommends that for the purpose of frequency planning for sound and television broadcasting, the following terms and definitions should be used: Signal-to-interference ratios; Specificfield strengths; Coverage area (of a broadcasting transmitter in a given broadcasting band).The CCIR unanimously recommends that for the purpose of frequency planning for sound and television broadcasting, the following terms and definitions should be used: Signal-to-interference ratios; Specificfield strengths; Coverage area (of a broadcasting transmitter in a given broadcasting band).