Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurements on satellite earth stations - Section 7: Figure-of-merit of receiving system

Describes several methods of measuring the figure-of-merit (G/T) of the receiving systems of earth stations.

Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen - Teil 3: Messungen an Satelliten-Erdfunkstellen - Hauptabschnitt 7: Gütezahl des Empfangssystems

Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission numérique en hyperfréquence - Partie 3: Mesures applicables aux stations terriennes de télécommunications par satellite - Section 7: Facteur de qualité du système de réception

Décrit plusieurs méthodes de mesure du facteur de qualité (G/T) des systèmes de réception des stations terriennes.

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurements on satellite earth stations - Section 7: Figure-of-merit of receiving system (IEC 60835-3-7:1995)

General Information

Status
Withdrawn
Publication Date
28-May-1995
Withdrawal Date
14-Feb-1996
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SLOVENSKI STANDARD
SIST EN 60835-3-7:2002
01-oktober-2002
Methods of measurement for equipment used in digital microwave radio
transmission systems - Part 3: Measurements on satellite earth stations - Section
7: Figure-of-merit of receiving system (IEC 60835-3-7:1995)
Methods of measurement for equipment used in digital microwave radio transmission
systems -- Part 3: Measurements on satellite earth stations -- Section 7: Figure-of-merit
of receiving system
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen -- Teil 3:
Messungen an Satelliten-Erdfunkstellen -- Hauptabschnitt 7: Gütezahl des
Empfangssystems
Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission
numérique en hyperfréquence -- Partie 3: Mesures applicables aux stations terriennes de
télécommunications par satellite -- Section 7: Facteur de qualité du système de réception
Ta slovenski standard je istoveten z: EN 60835-3-7:1995
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST EN 60835-3-7:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60835-3-7:2002

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SIST EN 60835-3-7:2002

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SIST EN 60835-3-7:2002

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SIST EN 60835-3-7:2002

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SIST EN 60835-3-7:2002

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SIST EN 60835-3-7:2002
NORME CEI
INTERNATIONALE IEC
60835-3-7
INTERNATIONAL
Première édition
STAN DARD
First edition
1995-03
Méthodes de mesure applicables au matériel
utilisé pour les systèmes de transmission
numérique en hyperfréquence
Partie 3:
Mesures applicables aux stations terriennes
de télécommunications par satellite
Section 7: Facteur de qualité du système
de réception
Methods of measurement for equipment used in
digital microwave radio transmission systems
Part 3:
Measurements on satellite earth stations
Section 7: Figure-of-merit of receiving system
© IEC 1995 Droits de reproduction réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
IEC MemgyHapogHaR 3neKTpoTexHH4eCHaR KOMHCCHA
vigueur
Pour prix, voir catalogue en
• •
For price, see current catalogue

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SIST EN 60835-3-7:2002
- 3 -
835-3-7 © IEC:1995
CONTENTS
Page
FOREWORD 7
9
INTRODUCTION
Clause
11
1 Scope
11
2 Normative references
11
3 Definition and general considerations
13
4 Indirect method of measurement
13
5 Direct method of measurement using a radio star
5.1 General considerations 13
5.2 Method of measurement 15
17
5.3 Correction factors
17 Correction for atmospheric attenuation (C 1 ) 5.3.1
2) 17
5.3.2 Correction for the angular extension of the radio star (C
Correction for the change of radio-star flux density
5.3.3
19
with time (C3)
5.3.4 Correction for frequency dependence of flux density of
19
the radio star (C4)
19
5.3.5 Correction for the polarization of radio-star flux
19
5.4 Presentation of results
19
5.5 Details to be specified
5.6 Error analysis 21
21
6 Direct method of measurement using a remote source
21
6.1 General considerations
21
6.2 Method of measurement
23
6.2.1 Measurement procedures
6.2.2 Calculation of G/T 25
25
6.3 Presentation of results
25
6.4 Details to be specified
Figures
1 Typical G/T measurement arrangement using i.f. precision variable attenuator 27
2 Typical G/T measurement arrangement using r.f. precision variable attenuator 29

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SIST EN 60835-3-7:2002
835-3-7 © IEC:1995 — 5 —
Figures Page
3 Typical G/T measurement arrangement using a test down-converter 31
4 Simplified arrangement for direct G/T measurement 33
5 Linearity and signal ratio 35
A.1 Correction factor for the angular extension of radio stars 39
Annexes
A Radio star and atmospheric loss data 37
B Bibliography 41

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SIST EN 60835-3-7:2002
835-3-7 © IEC:1995 - 7 -
INTER
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