EN 60835-2-4:1995/A1:1997

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 4: Transmitter/receiver including modulator/demodulator

EN following parallel vote

Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen - Teil 2: Messungen an terrestrischen Richtfunksystemen - Hauptabschnitt 4: Sender/Empfänger einschließlich Modulator/Demodulator

Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission numérique en hyperfréquence - Partie 2: Mesures applicables aux faisceaux hertziens terrestres - Section 4: Emetteur/récepteur, modulateur/démodulateur inclus

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 4: Transmitter/receiver including modulator/demodulator - Amendment A1 (IEC 60835-2-4:1993/A1:1997)

General Information

• Status: Withdrawn
• Publication Date: 02-Dec-1997
• Withdrawal Date: 31-Jul-1998
• 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 60835-2-4:2002/A1:2002 - Methods of measurement for equipment used in digital microwave radio transmission systems -- Part 2: Measurements on terrestrial radio-relay systems -- Section 4: Transmitter/receiver including modulator/demodulator

Relations

• Amends: EN 60835-2-4:1995 - Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 4: Transmitter/receiver including modulator/demodulator
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2002
Methods of measurement for equipment used in digital microwave radio
transmission systems - Part 2: Measurements on terrestrial radio-relay systems -
Section 4: Transmitter/receiver including modulator/demodulator - Amendment A1
(IEC 60835-2-4:1993/A1:1997)
Methods of measurement for equipment used in digital microwave radio transmission
systems -- Part 2: Measurements on terrestrial radio-relay systems -- Section 4:
Transmitter/receiver including modulator/demodulator
Meßverfahren für Geräte in digitalen Mikrowellen-Funkübertragungssystemen -- Teil 2:
Messungen an terrestrischen Richtfunksystemen -- Hauptabschnitt 4: Sender/Empfänger
einschließlich Modulator/Demodulator
Méthodes de mesure applicables au matériel utilisé pour les systèmes de transmission
numérique en hyperfréquence -- Partie 2: Mesures applicables aux faisceaux hertziens
terrestres -- Section 4: Emetteur/récepteur, modulateur/démodulateur inclus
Ta slovenski standard je istoveten z: EN 60835-2-4:1995/A1:1997
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
60835-2-4
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT 1
1997-11
Amendement 1
Méthodes de mesure applicables au matériel
utilisé pour les systèmes de transmission
numérique en hyperfréquence –
Partie 2:
Mesures applicables aux faisceaux
hertziens terrestres –
Section 4: Emetteur/récepteur,
modulateur/démodulateur inclus
Amendment 1
Methods of measurement for equipment used
in digital microwave radio transmission systems –
Part 2:
Measurements on terrestrial radio-relay systems –
Section 4: Transmitter/receiver including
modulator/demodulator
 IEC 1997 Droits de reproduction réservés  Copyright - all rights reserved
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Commission Electrotechnique Internationale
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60835-2-4 Amend. 1  IEC:1997 – 3 –
FOREWORD
This amendment has been prepared by IEC technical committee 102: Equipment used in
mobile sevices and satellite communication systems.
The text of this amendment is based on the following documents:
FDIS Report on voting
102/8/FDIS 102/18/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, on page 5, the following items:
5.3 Selective fading signature .
5.3.1 General considerations .
5.3.2 Method of measurement.
5.3.3 Presentation of results .
5.3.4 Details to be specified .
Figures
5 Functional arrangement of the fading simulator .
6 Wideband frequency characteristic of the two-ray i.f. fading simulator .
7 Example of minimum / non-minimum phase signature .
Page 29
5.3 Selective fading signature
Add the following new text:
5.3.1 General considerations
Digital radio-relay systems designed for the transmission of high bit rates are susceptible to
selective fading due to multipath propagation. This results in a BER which is higher than that
which would be caused by flat fading of the same mean value.

60835-2-4 Amend. 1  IEC:1997 – 5 –
In order to assess the sensitivity of the radio-relay system to the effects of multipath
propagation during acceptance or type test, a "two-ray fading simulator" can be used in the i.f.
or r.f. path of the receiver. Signatures measured with this simulator, as explained in the next
subclause, are suitable for the comparison of different digital radio-relay systems and adaptive
equalizers in their sensitivity to multipath fading, and also for predicting outage time due to
selective fading in the field.
In the simplified block diagram of the two-ray fading simulator shown in figure 5, the i.f. or r.f.
input signal is split into a direct p
...