EN 60835-2-8:1993

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 8: Adaptive equalizer

The measurements are intended to characterize the system equalizer in the presence of selective fading and may also be performed on systems without adaptive equalizers.

Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen - Teil 2: Messungen an terrestrischen Richtfunksystemen - Hauptabschnitt 8: Adaptative Entzerrer

Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission numérique en hyperfréquence - Partie 2: Mesures applicables aux faisceaux hertziens terrestres - Section 8: Egaliseur auto-adaptatif

Les mesures ont pour but de déterminer les perfomances de l'égaliseur du système en présence de sélectivité du canal radioélectrique et peuvent également être effectuées sur des systèmes non équipés d'égaliseurs auto-adaptatifs.

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 8: Adaptive equalizer (IEC 60835-2-8:1993)

General Information

• Status: Withdrawn
• Publication Date: 15-Jul-1993
• Withdrawal Date: 30-Jun-1994
• 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 60835-2-8:2002 - Methods of measurement for equipment used in digital microwave radio transmission systems -- Part 2: Measurements on terrestrial radio-relay systems -- Section 8: Adaptive equalizer

Relations

• Amended By: EN 60835-2-8:1993/A1:1996 - Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 8: Adaptive equalizer
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60835-2-8:2002
01-oktober-2002
Methods of measurement for equipment used in digital microwave radio
transmission systems - Part 2: Measurements on terrestrial radio-relay systems -
Section 8: Adaptive equalizer (IEC 60835-2-8:1993)
Methods of measurement for equipment used in digital microwave radio transmission
systems -- Part 2: Measurements on terrestrial radio-relay systems -- Section 8: Adaptive
equalizer
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen -- Teil 2:
Messungen an terrestrischen Richtfunksystemen -- Hauptabschnitt 8: Adaptative
Entzerrer
Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission
numérique en hyperfréquence -- Partie 2: Mesures applicables aux faisceaux hertziens
terrestres -- Section 8: Egaliseur auto-adaptatif
Ta slovenski standard je istoveten z: EN 60835-2-8:1993
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST EN 60835-2-8:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60835-2-8:2002

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SIST EN 60835-2-8:2002

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SIST EN 60835-2-8:2002

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SIST EN 60835-2-8:2002
NORME CEI
INTERNATIONALE IEC
60835-2-8
INTERNATIONAL
Première édition
STAN DARD
First edition
1993-05
Méthodes de mesure applicables au matériel
utilisé pour les systèmes de transmission
numérique en hyperfréquence
Partie 2:
Mesures applicables aux faisceaux hertziens
terrestres
Section 8: Egaliseur auto-adaptatif
Methods of measurement for equipment used in
digital microwave radio transmission systems
Part 2:
Measurements on terrestrial radio-relay systems
Section 8: Adaptive equalizer
© IEC 1993 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
sous
utilisée 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: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
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PRICE CODE
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Pour prix, voir catalogue en vigueur
• •
For price, see current catalogue

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SIST EN 60835-2-8:2002
835-2-8 © IEC:1993 — 3 —
CONTENTS
Page
FOREWORD 7
Clause
1 Scope 9
2 General 9
2.1 Frequency domain equalizer 11
2.2 Time domain equalizer 11
2.3 Evaluation of system parameters influenced by the equalizers 13
3 Outage signature 15
3.1 Definition and general considerations 15
3.2 Measurement method 17
3.3 Presentation of results 19
3.4 Details to be specified 19
4 Return signature 19
4.1 Definition and general considerations 19
4.2 Measurement method 21
4.3 Presentation of results 21
4.4 Details to be specified 21
5 Measurement of dynamic fading effects 23
6 Recovery time 23
6.1 Definition and general considerations 23
6.2 Measurement method 23
6.3 Presentation of results 25
6.4 Details to be specified 25
7 Additional measurements 25
7.1 Outage signature with flat fading 25
7.2 Outage signature with interfering adjacent channels 25

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SIST EN 60835-2-8:2002
835-2-8 © IEC:1993 – 5 –
Page
Figures
1 Linear distortion and crosstalk in a QAM system caused by multipath fading 27
2 Block diagram of a linear baseband equalizer 27
3 Basic arrangement for the measurement of signatures 29
4 Example of an outage signature 29
5 Example of an outage signature with possible unusual signature values 31
6 Presentation of the signature, minimum phase and non-minimum phase, on the same
ordinate scale 31
7 Example of the return signature 33
8 Arrangement for the measurement of recovery time 33
9 a) Bit sequence illustrating the definition of recovery time 35
b) Designation of normal alarm
and conditions 35
Annex A – Bibliography 37

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SIST EN 60835-2-8:2002
835-2-8 © IEC:1993 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHODS OF MEASUREMENT FOR EQUIPMENT
USED IN DIGITAL MICROWAVE RADIO
TRANSMISSIONS SYSTEMS
Part 2: Measurements on terrestrial radio-relay systems
Section 8: Adaptive equalizer
FOREWORD
1)
The IEC (International Electrotechnical Commission)
...