EN 60315-3:1999/A1:1999

SLOVENSKI STANDARD
01-marec-2001
Methods of measurement on radio receivers for various classes of emission - Part
3: Receivers for amplitude-modulated sound broadcasting emissions -
Amendment A1 (IEC 60315-3:1989/A1:1999)
Methods of measurement on radio receivers for various classes of emission -- Part 3:
Receivers for amplitude-modulated sound-broadcasting emissions
Meßverfahren für Funkempfänger für verschiedene Sendearten -- Teil 3:
Radiofrequenzmessungen an Empfängern für amplitudenmodulierte Sendungen
Méthodes de mesure applicables aux récepteurs radioélectriques pour diverses classes
d'émission -- Partie 3: Récepteurs pour émissions de radiodiffusion à modulation
d'amplitude
Ta slovenski standard je istoveten z: EN 60315-3:1999/A1:1999
ICS:
33.160.20 Radijski sprejemniki Radio receivers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
60315-3
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT 1
1999-02
Amendement 1
Méthodes de mesure applicables
aux récepteurs radioélectriques
pour diverses classes d'émission –
Partie 3:
Récepteurs pour émissions de radiodiffusion
à modulation d'amplitude
Amendment 1
Methods of measurement on radio receivers
for various classes of emission –
Part 3:
Receivers for amplitude-modulated
sound-broadcasting emissions
 IEC 1999 Droits de reproduction réservés  Copyright - all rights reserved
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Commission Electrotechnique Internationale
PRICE CODE P
International Electrotechnical Commission
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For price, see current catalogue

60315-3 Amend. 1 © IEC:1999 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 100A: Multimedia end-user equipment,
of IEC technical committee 100: Audio, video and multimedia systems and equipment.
The text of this amendment is based on the following documents:
FDIS Report on voting
100A/110/FDIS 100A/118/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
––––––––––
Page 19
3.2 Method of measurement
Replace note 1 in a) by the following text:
1 Unweighted noise measurements using a wide-band filter or A-weighting noise
measurements may be made if required (see clause 6 of IEC 60315-1). In these methods,
noise is measured with an r.m.s. meter (preferably a true r.m.s. meter). The method used
should be clearly stated with the results.
Page 21
3.4.3 Noise-limited sensitivity
Add the following note to the end of the paragraph:
NOTE – The unweighted noise measurement may be used if required. The method used should be clearly stated
with the results.
Page 33
5.3 Presentation of results
Add the following sentence:
An example is shown in figure 4.
Page 35
6.3 Presentation of results
Add the following sentence:
An example is shown in figure 5.

60315-3 Amend. 1 © IEC:1999 – 5 –
Page 43
8.2 Presentation of results
Add the following sentence:
An example is shown in figure 6.
Page 53
10.3 Presentation of results
Add the following sentence:
Examples are shown in figures 7, 8 and 9.
10.5 Presentation of results
Add the following sentence:
An example is shown in figure 10.
Page 55
11.3 Presentation of results
Add the following sentences:
An example is shown in figure 11.
In the case of a receiver which is designed to receive emissions using pre-emphasis, the de-
emphasis characteristics of the receiver may be presented on the same graph, as a second
ordinate.
Page 59
15 Single-signal beat-notes
15.1 Introduction
In the second last line of the first paragraph, replace “sub-multiples” by “subharmonics”.
Replace items a) and b) by the following text:
a) harmonics and subharmonics of the intermediate frequency: mf/n, where m and n are
i
positive integers and f is the intermediate frequency. These give rise to a.f. beat-notes
i
(whistles) when f = pf, where f is the operating frequency, p may have the following
d i d
values for example: 1/3, 2/3, 4/3, 5/3, 2, 3, 4, 5. Of these, p = 2 and p = 3 are the most
important for MF band receivers of conventional design;

60315-3 Amend. 1 © IEC:1999 – 7 –
b) harmonics and subharmonics of internal clock or oscillator frequencies mf /n, where m and
c
n are positive integers and f is a clock frequency. These signals may give rise to a.f. beat-
c
notes (whistles) when:
m
f=  f
dc
n
Delete the paragraph after item b) starting “As a consequence of .”.
Replace item c) by the following text:
c) intermodulation products of harmonics of the local oscillator frequency and harmonics and
subharmonics of the internal clock or oscillator frequencies: mf /n – l(f + f ), where m, n
c d i
and l are positive integers. These signals may give rise to a.f. beat-notes (whistles) when:
m l±1
f= f f−
dc i
nl⋅ l
All combinations of l, m and n which can give beat-notes, in any frequency band of which
the receiver is designed, should be checked.
Page 61
15.2 Method of measurement
Replace item a) to item f), on pages 61 and 63, by the following text:
a) The receiver is brought under standard measuring conditions. With no signal input, tune the
receiver slowly over the tuning range while listening to the audio output and note the
frequencies at which audible whistles occur. Particular attention should be given to
frequencies near harmonics of the intermediate-frequency, and of any clock frequency
(such as for a tuning synthesizer), which fall within the tuning range.
b) An unmodulated r.f. signal is applied at the level corresponding to the noise-limited
sensitivity and the receiver is tuned slowly over the tuning range while listening to the audio
output. If any audible whistle is observed, adjust the input signal frequency to produce zero
beat (that is, as low an audio output frequency as possible) and note the input frequency.
c) At each of these frequencies, the modulation is set to zero and the signal frequency is
adju
...