EN 60835-1-1:1992
(Main)Methods of measurement for equipment used in digital microwave radio transmission systems - Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations - Section 1: General
Methods of measurement for equipment used in digital microwave radio transmission systems - Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations - Section 1: General
The conditions of measurement and the methods of measuring the characteristics given in the standard are common to terrestrial radio-relay and satellite earth station systems using digital modulation. These test methods are general and are applicable to systems of all capacities. Describes the conditions and methods of measurement to be used to ascertain the performance of digital microwave radio transmission systems and of the equipment used in such systems.
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen - Teil 1: Messungen an terrestrischen Richtfunksystemen und Satelliten-Erdfunkstellen - Hauptabschnitt 1: Allgemeines
Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission numérique en hyperfréquence - Partie 1: Mesures communes aux faisceaux hertziens terrestres et aux stations terriennes de télécommunications par satellite - Section 1: Généralités
Les conditions et les méthodes de mesure des caractéristiques du matériel données dans cette norme sont communes aux systèmes de faisceaux hertziens terrestres et de stations terriennes de télécommunication par satellite utilisant une modulation numérique. Ces méthodes d'essai sont générales et applicables à tous les systèmes, quelle que soit leur capacité. Décrit les conditions et les méthodes de mesure à utiliser pour élever les caractéristiques des systèmes de transmission numérique en hyperfréquence et du matériel utilisé dans ces systèmes et de faciliter la comparaison des résultats de mesures effectuées par différents observateurs. Contient les détails de méthodes de mesure sélectionnées, recommandées pour déterminer les caractéristiques essentielles d'un tel système et du matériel qui y est utilisé.
Methods of measurement for equipment used in digital microwave radio transmission systems - Part 1: Measurements common to terrestrial radio-relay systems and satellite earth stations - Section 1: General (IEC 60835-1-1:1990)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2002
Methods of measurement for equipment used in digital microwave radio
transmission systems - Part 1: Measurements common to terrestrial radio-relay
systems and satellite earth stations - Section 1: General (IEC 60835-1-1:1990)
Methods of measurement for equipment used in digital microwave radio transmission
systems -- Part 1: Measurements common to terrestrial radio-relay systems and satellite
earth stations -- Section 1: General
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen -- Teil 1:
Messungen an terrestrischen Richtfunksystemen und Satelliten-Erdfunkstellen --
Hauptabschnitt 1: Allgemeines
Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission
numérique en hyperfréquence -- Partie 1: Mesures communes aux faisceaux hertziens
terrestres et aux stations terriennes de télécommunications par satellite -- Section 1:
Généralités
Ta slovenski standard je istoveten z: EN 60835-1-1:1992
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME
CEI
INTERNATIONALE IEC
60835-1-1
INTERNATIONAL
Première édition
STANDARD
First edition
1990-03
Méthodes de mesure applicables au matériel
utilisé pour les systèmes de transmission
numérique en hyperfréquence
Partie 1:
Mesures communes aux faisceaux hertziens
terrestres et aux stations terriennes de
télécommunications par satellite
Section un – Généralités
Methods of measurement for equipment used in
digital microwave radio transmission systems
Part 1:
Measurements common to terrestrial radio-relay
systems and satellite earth stations
Section One – General
© IEC 1990 Droits de reproduction
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835-1-1 © IE C -
CONTENTS
Page
FOREWORD
PREFACE 5
Clause
1. Scope 7
2. Normative references 7
3. Terms and definitions 9
4. Conditions of measurement 13
5.
Standard test conditions 13
6.
Supplementary conditions for the power supply 17
7. Measurements under conditions deviating from standard
test conditions 23
FIGURES 27
APPENDIX A - Bibliography 33
835-1-1 © IEC - 5
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHODS OF MEASUREMENT FOR EQUIPMENT USED
IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS
Part 1: Measurements common to terrestrial radio-relay systems
and satellite earth stations
Section One - General
FOREWORD
1)
The formal decisions or agreements of the IEC on technical matters,
prepared by Technical Committees on which all the National Committees
having a special interest therein are represented, express, as nearly
as possible, an international consensus of opinion on the subjects
dealt with.
2)
They have the form of recommendations for international use and they
are accepted by the National Committees in that sense.
3)
In order to promote international unification, the IEC expresses the
wish that all National Committees should adopt the text of the IEC
recommendation for their national rules in so far as national condi-
tions will permit. Any divergence between the IEC recommendation and
the corresponding national rules should, as far as possible, be clearly
indicated in the latter.
PREFACE
This standard has been prepared by Sub-Committee 12E: Radio relay and
fixed satellite communications systems, of IEC Technical Committee No. 12:
Radiocommunications.
The text of this standard is based upon the following documents:
Six Months' Rule
Report on Voting
1ZE(CO)118
12E(CO)126
Full information on the voting for the approval of this standard can be
found in the Voting Report indicated in the above table.
835-1-1 © IEC - 7 -
METHODS OF MEASUREMENT FOR EQUIPMENT USED
IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS
Part 1: Measurements common to terrestrial radio-relay systems
and satellite earth stations
Section One - General
1. Scope
The conditions of measurement
and the methods of measuring the
characteristics given in this part
of the standard are common to ter-
restrial radio-relay and satellite
earth station systems using digital
modulation. These test methods
are general and are applicable to
systems of all capacities and the tests to be made should be agreed
between the parties concerned.
The object of this standard is to describe the conditions and methods
of measurement_ to be used to ascertain the performance of digital
microwave radio transmission systems and of the equipment used in
such systems, and to facilitate the comparison of the results of
measurements made by different observers. It contains details of
selected methods of making measurements recommended for assessing
the essential properties of a digital microwave radio transmission
system and of the equipment used in such systems. These methods are
neither mandatory nor limiting; a choice of measurements can be made
in each particular case. If necessary, additional measurements may be
made but these should preferably be carried out in accordance with
the standards laid down by other IEC Technical Committees, or Sub-
Committees or by other international bodies.
Limiting values of the various quantities for acceptable performance
are not specified since these should be given in the detailed equipment
specification.
The methods of measurement described in this standard are intended
for "type" and `acceptance" tests under simulated conditions and they
may also be used for factory tests.
2.
Normative references
The following IEC publications are quoted in this standard:
Publications Nos. 68: Environmental testing.
68-1 (1988) : Part 1: General and guidance.
68-2-1 (1974): Part 2: Tests - Tests A: Cold.
835-1-1 © IEC - 9 -
68-2-2 (1974) : Tests B: Dry heat.
68-2-3
(1969) : Test Ca: Damp heat, steady state.
68-2-30 (1980) :
Test Db and guidance: Damp heat, cyclic
(12 + 12
-hour cycle).
76 (1967): Power transformers.
84 (1957): Recommendations for mercury-arc convertors.
119 (1960) : Recommendations for polycrystalline semi-
conductor rectifier stacks and equipment.
(1987) : Safety requirements for radio transmitting
equipment.
and the following CISPR publication:
16 (1987): CISPR specification for radio interference
measuring apparatus and measurement method.
3. Terms and definitions
The methods of measurement described in this part and in the other
parts of this standard are preceded by the definition of the quantity
to be measured, either in the relevant clause or in a separate clause
in order to show the coherence between the various definitions.
As far as practicable, the definitions are in conformity with those
given in the IEC International Electrotechnical Vocabulary (IEV) or
with those used by other Technical Committees of the IEC or other
international bodies. Where deviations exist, they appeared necessary
for a better understanding of this standard.
3.1 Detailed equipment specification
Any document especially drawn up or provided, which describes the
properties and the performance of an equipment under specified condi-
tions of normal use, together with specified fault conditions which may
arise.
Note.-
For the general principles and the test methods to be followed
to assess that the equipment conforms to the appropriate safety
regulations under conditions of normal use and under specified
conditions, reference should be made to IEC 215.
3.2 Digital microwave radio transmission system
For the purpose of this standard the elements comprising a digital
microwave radio transmission system are those shown in figures 1 and
2 for terrestrial radio-relay systems and satellite earth stations.
835-1-1 © IEC - 11 -
System configurations differ, so, for simplicity, certain elements,
e.g. service channel arrangements and adaptive equalizers, which may
be present are not shown in the figures.
3.3 Type
A type comprises products having similar design features employing
similar manufacturing techniques and which fall within the manufac-
turer's usual range of characteristics.
Notes 1.- Mounting accessories can be ignored, provided that they
have no significant effect on the test results.
2.- "Characteristics" cover the combinations of:
a) electrical ratings;
b) sizes;
c) behaviour under environmental stress.
3.- The list of characteristics and their limits should be
agreed upon between purchaser and manufacturer.
3.4 Type test
The complete series of tests to be carried out on a number of iden-
tical specimens representative of the type, and which contribute to
determining that a particular manufacturer can be considered capable
of producing equipment meeting the specification.
3.5 Type approval
The decision by the proper authority, e.g. government agency, the
purchaser or his nominee, that a particular manufacturer can be
considered capable of meeting the specification.
3.6 Acceptance tests
Tests carried out to determine the acceptability of a consignment on
the basis of an agreement between purchaser and manufacturer.
The agreement shall cover:
a) the size of the sample;
b) the selection of tests;
c) tolerances and exceptions.
3.7 Factory tests
Tests carried out by the manufacturer to ascertain if the equipment
which he produces meets the specification.
835-1-1 © IEC - 13 -
3.8 Glossary of terms
Please see References [1] and [2]*.
4. Conditions of measurement
Care shall be taken to avoid all conditions which may lead to the
equipment being. damaged. Unless otherwise specified, the measurement
shall be carried out under standard conditions with respect of power
supply, temperature, air pressure, humidity and terminal load, as
given below. After the equipment has been finally set up for these
conditions, the settings shall be kept constant during all measure-
ments, with the exception of those settings which need to be varied
before or during a specified measurement period.
5. Standard test conditions
5.1 Standard conditions for the power supply
Measurements under standard power supply conditions are carried
out at the nominal voltage and the nominal frequency stated in the
detailed equipment specification. The voltage shall be measured at the
power supply terminals of the equipment under test.
During tests carried out on a sub-system or on a simulated system,
the voltage and the frequency of the power supply shall not deviate
from the nominal values by more than ±2% unless otherwise specified.
Unless otherwise specified, standard supply conditions include the
supplementary conditions given in clause 6.
5.2
Standard atmospheric conditions
Measurements under standard atmospheric conditions are normally
carried out in accordance with 5.2.1 below. If necessary, the results
of the measurements should be corrected by calculation to the standard
reference temperature of 20 °C and to the standard reference air
pressure of 1.013 x 10
5 Pa (1 013 mbar) as explained in 5.2.2.
If this correction is not possible, the measurements should be made
at one of the standard referee conditions specified in 5.2.3, preferably
at that corresponding to an ambient temperature of 20 ± 1 °C.
Note.-
The standard atmospheric conditions stated in this subclause
are in conformity with those given in IEC 68-1.
The figures in square brackets refer to "Bibliography",
Appendix A, page 33.
835-1-1 © IEC - 15 -
5.2.1
Standard test conditions
Measurements and mechanical tests, the results of which are either
independent of temperature and air pressure, or can be corrected by
calculation to the standard reference temperature and air pressure
stated in 5.2.2, shall normally be carried out
under any existing
combinations of temperature, humidity and air pressure, provided they
are within the following limits:
- temperature: +
15 °C to +35 °C;
relative humidity: 45% to 75%;
-
air pressure: 8.6 x 10' Pa to 1.06 x 10 5 Pa (860 mbar to
1 060 mbar) .
If the quantities to be measured depend on temperature, humidity
and air pressure and the law of dependence is unknown, the standard
referee conditions given in 5.2.3 shall apply.
5.2.2
Standard reference conditions
If the quantities to be measured depend on temperature and/or air
pressure and the law of dependence
is known, the value shall be
measured under the conditions given in 5.2.1 and, if necessary,
corrected by calculation to the following reference values:
temperature: +20 °C;
- air pressure: 1.013 x 105 Pa (1 013 mbar).
Note.-
No requirements for relative humidity are given because
correction by calculation is not generally possible.
5.2.3
Standard referee conditions
If the quantities to be measured depend on temperature,
humidity
and air pressure and the law of dependence is unknown, the
measu re-
ment
shall be made, by mutual agreement, under one of the
following
sets of conditions:
Temperature Relative humidity
Air pressure
+20 ± 1 °C 63% - 67%
8.6 x 10'' Pa - 1.06 x 10 5 Pa
(860 mbar - 1 060 mbar)
+23 ± 1
°C
48% - 52% 8.6 x 10'' Pa - 1.06 x 10 5 Pa
(860 mbar - 1 060 mbar)
+25 ± 1
°C
48% - 52% 8.6 x 10 4 Pa - 1.06 x 10 5 Pa
(860 mbar - 1 060
...
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