METHODS OF MANAGEMENT ON RADIO RECEIVERS FOR VARIOUS CLASSES OF EMISSION - RECEIVERS FOR FREQUENCY-MODULATED SOUND BROADCASTING EMISSIONS
International Electrotechnical Committee
FOREWORD
1 General
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Standard measuring conditions
1.5 General notes on measurements
2 Sensitivity and internal noise
2.1 Explanation of terms
2.2 Signal-to-noise ratio (weighted and unweighted)
and SINAD
2.3 Noise-limited sensitivity
2.4 Gain-limited sensitivity
2.5 Usable sensitivity
2.6 Deviation sensitivity
2.7 Input-output characteristics
3 Rejection of unwanted signals
3.1 Capture ratio
3.2 Selectivity and nearby channel rejection
(two-signal)
3.3 Rejection of intermediate and image frequencies,
and spurious responses
3.4 Suppression of amplitude modulation
3.5 Rejection of r.f. signal intermodulation
products
3.6 Tuning and automatic frequency control (AFC)
characteristics
4 Interference due to internal sources
4.1 Single-signal whistles
4.2 Modulation hum (interference at power supply
frequency)
4.3 Unwanted self-oscillations
4.4 Acoustic feedback
5 Overall audio-frequency characteristics
5.1 Fidelity
5.2 Harmonic distortion
5.3 Intermodulation distortion
5.4 Inter-channel characteristics
5.5 Characteristics of the volume control
5.6 Residual output
5.7 Crosstalk attenuation
5.8 Overall audio-frequency response
6 Effect of additional modulations of the input signal
6.1 Rejection of signals in the ranges 16 kHz to
22 kHz and 54 kHz to 99 kHz
6.2 Rejection of signals in the range 62 kHz to
73 kHz (SCA rejection)
6.3 Measurement of interference caused by RDS signals
6.4 Suppression of the fundamental, harmonics and
sidebands of the subcarrier and the pilot-tone
system
6.5 Suppression of interference due to adjacent
channel signals with a stereophonic receiver
using the pilot-tone system
7 Sensitivity, antenna gain and directional response of
receivers using rod, telescopic or built-in antennas
7.1 Introduction
7.2 Method of measurement of sensitivity and antenna
gain for a receiver using a rod or telescopic
antenna by the absorbing clamp described in CISPR
16-1
7 Sensitivity, antenna gain and directional response of
receivers using rod, telescopic or built-in antennas
7.1 Introduction
7.2 Method of measurement of sensitivity and antenna
gain for a receiver using a rod or telescopic
antenna by the absorbing clamp described in
CISPR 16-1
8 Characteristics whose methods of measurement are
specified in IEC 60315-1
8.1 Introduction
8.2 List of characteristics and cross-references
Figures
1 Frequency response limits of band-pass filter 200 Hz
to 15 kHz
2 Frequency response limits of band-pass filter 22.4 Hz
to 15 kHz
3 Frequency response limits of band-pass filter 200 Hz
to 1.5 Hz
4 Frequency response limits of the 1 kHz band-elimination
filter
5 Weighting filter for converting white noise into
special coloured noise for selectivity measurements
6 Arrangement for various measurements with two r.f.
input signals
7 Antenna substitution networks for injecting one or two
signals, for 50 n signal generators and 75 n unbalanced
and 300 n balanced receiver inputs
8 Arrangement for various measurements with one r.f.
input signal
9 Signal-to-noise ratio
10 Noise-limited sensitivity as a function of signal
frequency
11 Gain-limited sensitivity as a function of signal
frequency
12 Output/input characteristics and noise output curves
showing terms defined in 1.3
13 Capture ratio
14 Selectivity curves
15 Image and intermediate frequency rejection ratios
16 Spurious responses at a tuning frequency of 94 MHz
(single signal method)
17 Arrangement for measuring rejection of unwanted
signals simulating cable reception, using sinusoidal
modulation
18 Arrangement for various measurements using three r.f.
input signals
19 Tuning characteristics
20 Tuning characteristics obtained by measuring the local
oscillator frequency
21 Measurement of acoustic feedback
22 Arrangement for measuring fidelity
23 Overall total harmonic distortion as a function of
a.f. output power
24 Distortion-limited output power as a function of
modulation frequency
25 Total harmonic distortion as a function of r.f. input
signal level
26 Total harmonic distortion as a function of the deviation
27 Variation of distortion with detuning
28 Total harmonic distortion as a function of the a.f.
modulation frequency
29 Cross-intermodulation between the channels of a
stereo receiver (pilot-tone system)
A.1 Example of a passive 1 kHz band-elimination filter
capable of meeting the limits shown in figure 4
D.1 Arrangement for r.f. signal injection into a antenna
with an absorbing clamp
D.2 Correction curves for the insertion loss of the
absorbing clamp
Annexes
A Example of a 1 kHz band-elimination filter
B Standard deviations for supplementary services
C Measurement of crosstalk between stereo channels
D Characteristics of rod and telescopic antennas
(under consideration)
Applicable to radio receivers and tuners for receiving frequency-modulated sound-broadcasting emission with rated maximum system deviations. Covers mostly methods of measurement by means of radio-frequency signals applied to the antenna terminals of the receiver. Chooses the measurements and specific conditions of test in order to allow the comparison of results obtained by different observers and on other receivers. Does not define performance requirements.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 100 |
| Supersedes |
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