EN 60835-1-2:1993/A1:1995

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 2: Basic characteristics

EN following parallel vote

Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen - Teil 1: Messungen an terrestrischen Richtfunksystemen und Satelliten-Erdfunkstellen - Hauptabschnitt 2: Grundlegende Eigenschaften

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 2: Caractéristiques de base

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 2: Basic characteristics - Amendment A1 (IEC 60835-1-2:1992/A1:1995

General Information

• Status: Withdrawn
• Publication Date: 22-Mar-1995
• Withdrawal Date: 29-Feb-1996
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: CLC/SR 102 - Equipment used in radio communications for mobile services and satellite communication systems
• Drafting Committee: IEC/TC 102 - IEC_TC_102
• Parallel Committee: IEC/TC 102 - IEC_TC_102
• Ref Project: SIST EN 60835-1-2:2002/A1:2002 - 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 2: Basic characteristics

Relations

• Amends: EN 60835-1-2:1993 - 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 2: Basic characteristics
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60835-1-2:2002/A1:2002
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 2: Basic characteristics -
Amendment A1 (IEC 60835-1-2:1992/A1:1995
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 2: Basic characteristics
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen -- Teil 1:
Messungen an terrestrischen Richtfunksystemen und Satelliten-Erdfunkstellen --
Hauptabschnitt 2: Grundlegende Eigenschaften
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 2:
Caractéristiques de base
Ta slovenski standard je istoveten z: EN 60835-1-2:1993/A1:1995
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST EN 60835-1-2:2002/A1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60835-1-2:2002/A1:2002

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SIST EN 60835-1-2:2002/A1:2002

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SIST EN 60835-1-2:2002/A1:2002

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SIST EN 60835-1-2:2002/A1:2002
NORME
CEI
INTERNATIONALE
IEC
INTERNATIONAL
60835-1-2
STANDARD
1992
AMENDEMENT 1
AMENDMENT 1
1995-02
Amendement 1
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 2: Caractéristiques de base
Amendment 1
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 2: Basic characteristics
© CEI 1995 Droits de reproduction réservés — Copyright – all rights reserved
rn Genève, Suisse
Bureau Central de la Commission Electrotechnique Inte ationale 3, rue de Varembé
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
IEC MeregyHapo uiaa 3nexrporexHu4ecsan KoMHCCHA
Pour prix, voir catalogue en vigueur
•
For price, see current catalogue

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SIST EN 60835-1-2:2002/A1:2002
835-1-2 Amend. 1 © IEC:1995 - 3 -
FOREWORD
This amendment has been prepared by sub-committee 12E: Radio relay and satellite
communication systems, of IEC technical committee 12: Radiocommunications.
The text of this amendment is based on the following documents:
DIS
Report on voting
12E(CO)164 12E/250/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 3
CONTENTS
Add the title of clause 6 as follows:
6 Noise temperature and noise figure
Page 29
Add, after 5.2.5, the following new clause:
6 Noise temperature and noise figure
Introduction
6.1
This clause concentrates on the methods of measurement to be used in order to evaluate
the noise figure of sub-systems and/or combinations of sub-systems under linear
conditions where appropriate ports are available.
Noise temperature is an important parameter in satellite systems and is a convenient
indication of the noise power produced by a system or sub-system. It is usually expressed
in terms of an "equivalent" temperature rather than an "actual" temperature, since it is a
measure of the effects of all the thermal and non-thermal noise sources.
6.2 Definitions
The performance of a receiver is generally characterized by its noise figure NF, expressed
in decibels. For a two-port device it is defined as the ratio of the signal-to-noise ratio at
the input to the signal-to-noise ratio at the output under matched conditions. The noise
figure therefore indicates how much the signal-to-noise ratio at the output is lower than at
the input. NF
is therefore always greater than 0 dB.

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SIST EN 60835-1-2:2002/A1:2002
- 5 -
835-1-2 Amend. 1 © IEC:1995
The equivalent noise temperature, TE, is related to the noise figure F, expressed in linear
numerals, by the expression:
(7-1)
TE = 290 (F-1)
The noise figure NF, expressed in decibels, is defined as:
T
NF= 10 log o (7-2)
(1 + 290 )
6.2.1
Equivalent noise temperature of a two-port device
The equivalent noise temperature T E of a two-port device is a fictitious noise temperature
...