IEC 60244-11 : 1.0

METHODS OF MEASUREMENT FOR RADIO TRANSMITTERS - TRANSPOSERS FOR FM SOUND BROADCASTING

International Electrotechnical Committee

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Cooperating organizations
National foreword
Foreword
Introduction
1. Scope
2. Object
Section one - General conditions of operation and
measurement
3. Definition
4. Input and output signal arrangement
5. General conditions regarding input signal source
     and test load
6. Terms and definitions for input and output signals
7. General conditions of operation
Section two - Input and output levels and general trans-
poser characteristics
8. Input impedance mismatch
9. Adjustment and measurement of input levels
10. Automatic gain control
11. Adjustment and measurement of output power
12. Frequency
13. Internally generated unwanted signals at the
     transposer input
Section three - Transmission performance characteristics
14. Amplitude/baseband-frequency characteristic
15. Audio-frequency harmonic distortion
16. Harmonic distortion in the coded channels of a
     stereophonic service
17. Crosstalk attenuation (sterophonic separation)
18. Linear and non-linear crosstalk between A and B
     channels
19. Baseband-frequency intermodulation
20. Transmission performance for supplementary services
     (under consideration)
Section four - Unwanted modulation and spurious emissions
21. Introduction
22. Unwanted frequency modulation
23. Unwanted amplitude modulation
24. Unwanted modulation in the presence of an interfering
     input signal
25. Unwanted modulation signals in the presence of two
     interfering input signals
26. Spurious emissions in the absence of interfering
     input signals
27. Spurious emissions in the presence of interfering
     input signals
28. Changes in performance caused by feedback from
     output to input
Appendix A - Input impedance
Annex ZA (normative) Other international publications
quoted in this standard with the references of the
relevant European publications
National annex NA (informative) Committees responsible

Abstract

Applies to transposers operating in accordance with CCIR Recommendation 450 for FM sound broadcasting at VHF, including stereophony. Also covers requirements for other multiplexed subcarrier services. Lays down detailed methods of measurements, selected and recommended for assessing the essential performance and general characteristics of FM sound broadcasting transposers.