METHODS OF MEASUREMENT ON RADIO RECEIVERS FOR VARIOUS CLASSES OF EMISSION - RECEIVERS FOR AMPLITUDE MODULATED SOUND BROADCASTING EMISSIONS
International Electrotechnical Committee
Foreword
Preface
Section One - General
1. Scope
2. Conditions for measurement
2.1 Standard measuring conditions
2.2 Tuning and automatic frequency control
2.3 Precautions
Section Two - Sensitivity and Internal Noise
3. Output/Input Characteristics
3.1 Introduction
3.2 Method of measurement
3.3 Presentation of results
3.4 Characteristics related to the output/input
and noise output/input characteristics
Section Three - Selectivity and Immunity
4. Explanation of terms
4.1 Selectivity
4.2 Immunity
4.3 Single-signal method
4.4 Two-signal method
4.5 Audio-frequency signal-to-interference ratio
4.6 Audio-frequency protection ratio
4.7 Radio-frequency wanted-to-interfering signal ratio
4.8 Radio-frequency protection ratio
4.9 Desenitization (blocking)
4.10 Cross-modulation
4.11 Intermodulation
4.12 Adjacent-channel and alternate-channel selectivity
4.13 Image rejection ratio
4.14 Intermediate-frequency rejection ratio
4.15 Spurious-response rejection ratio
4.16 Pass-band or X dB bandwith
4.17 Attenuation slope
5. Single-signal selectivity
5.1 Introduction
5.2 Method of measurement
5.3 Presentation of results
6. Two-signal selectivity using sinusoidal modulation of
the unwanted signal
6.1 Introduction
6.2 Method of measurement
6.3 Presentation of results
7. Two-signal selectivity using noise modulation
7.1 Introduction
7.2 Output measurement
7.3 Noise signal for modulating the signal generators
7.4 Measuring arrangements
7.5 Depth of modulation of the signal generators
7.6 Frequency separation of the sources
7.7 Audio-frequency signal-to-interference ratio
7.8 Measurements
7.9 Presentation of results
7.10 Influence of non-linear distortion in the signal
generators
7.11 Accuracy
8. Desensitization (blocking)
8.1 Method of measurement
8.2 Presentation of results
9. Intermodulation
9.1 Introduction
9.2 Method of measurement
9.3 Presentation of results
9.4 Precautions
10. Rejection of unwanted signals entering through the antenna
10.1 Introduction
10.2 Single-signal method of measurement
10.3 Presentation of results
10.4 Two-signal method of measurement
10.5 Presentation of results
11. Overall audio-frequency response
11.1 Introduction
11.2 Method of measurement
11.3 Presentation of results
12. Pass-band abd attenuation slope
12.1 Introduction
12.2 Modulation frequency and modulation factor
12.3 Method of measurement
12.4 Presentation of results
13. Selectivity controls
14. Immunity
Section Four - Interference Due to Internal Sources
15. Single-signal beat-notes
15.1 Introduction
15.2 Method of measurement
15.3 Presentation of results
16. Acoustic effects
17. Unwanted oscillations
18. Interference at the power-supply frequency and its
harmonics (hum)
18.1 Introduction
18.2 Method of measurement
18.3 Presentation of results
Section Five - Distortion
19. Introduction
20. Overall harmonic distortion, distortion-limited a.f.
output and distortion-limited input level
20.1 Method of measurement
20.2 Presentation of results
21. Method of measurement
21.1 Method of measurement
Section Six - Miscellaneous
22. Tuning and automatic frequency-control characteristics
22.1 Introduction
22.2 Method if measurement
22.3 Presentation of results
Figures
Applies to radio receivers for the reception of amplitude modulated sound broadcasting emissions. Deals mainly with measurements using radio frequency signals applied to the antenna terminals of the receiver, or induced in a magnetic antenna.Is intended to be read in conjunction with IEC 315 1.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | SC 12A |
| Supersedes |
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