標(biāo)準(zhǔn)號：IS 12193 Pt.3-1994
發(fā)布日期：1994/3/1 12:00:00
實(shí)施日期：1999/12/31 12:00:00
適用范圍：This part describes methods of measurements to be applied to radio receivers (with or without audio amplifiers) designed for monophonic and stereophonic frequency modulated sound broad-cast transmissions in ITU band 8 (VHF). Most of the methods are applicable to receivers designed for such broadcast transmission in other bands. It is intended to be used with IEC Publications 315-1: Methods of Measurement on Radio Receivers for Various Classes of Emission, Part 1: General Conditions for Measurements and Measuring Methods Applying to Several Types of Receivers, and 315-2: Part 2: Measurements Particularly Related to the Audio-frequency Part of a Receiver, in which general conditions and methods of measurement are given for various charac-teristics which are deemed to be applicable to all types of receivers.notes 1. — Methods of measurement of the immunity to impulsive interference entering through the antenna circuit are contained in IEC Publication 315-5. Part 5: Specialized Radio-frequency Measurements — Measurement on Frequency-modulated Receivers of the Response to Impulsive Interference.2. — For the measurement of radiation from receivers, reference is made to IEC Publication 106: RecommendedMethods of Measurement of Radiated and Conducted Interference from Receivers for Amplitude-modulation, Frequency-modulation and Television Broadcast Transmissions.3. — F.M. broadcasting system characteristics are described in C.C.I.R. Recommendation 412-4. Stereophonic sys-tems are described in C.C.I.R. Recommendation 450.4. — See Table IV of I EC Publication 315-1. ITU Band 8 is defined in ITU Publication Radio Regulations(Geneva)