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

EN following parallel vote

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

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 2: Measurements on terrestrial radio-relay systems - Section 8: Adaptive equalizer - Amendment 1 (IEC 60835-2-8:1993/A1:1996)

General Information

• Status: Withdrawn
• Publication Date: 17-Mar-1996
• Withdrawal Date: 30-Nov-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 60835-2-8:2002/A1:2002 - 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

• Amends: 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
• 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 8: Adaptive equalizer - Amendment 1 (IEC 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
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/A1:1996
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
INTERNATIONAL 60835-2-8
STANDARD 1993
AMENDEMENT
AMENDMENT
1996-01
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 8: Egaliseur auto-adaptatif
Amendment 1
Methods of measurement for equipment used in
digital microwave radio transmission systems
Part 2:
Measurements on terrestrial radio-relay systems
Section 8: Adaptive equalizer
© CEI 1996 Droits de reproduction réservés — Copyright – all rights reserved
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835-2-8 Amend. 1 © IEC:1996 – 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:
FRIS Report on voting
12E/255/FDIS 12E/264/RV D
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
Replace the existing title of clause 5 by the following:
5 Measurement of dynamic fading effects
5.1 Definition and general considerations
5.2 Method of measurement
5.2.1 Sweep of the notch offset frequency
5.2.2 Sweep of the relative echo amplitude
5.3 Presentation of results
5.3.1 Sweep of the notch offset frequency
5.3.2 Sweep of the relative echo amplitude
5.4 Details to be specified
Page 5
Add the titles of the following new figures:
10 Schematic for the measurement of dynamic fading effects
11a Illustration of sweep waveform for the measurement of the system sensitivity to
dynamic fading: sweep of the notch effect frequency
Graphical representation of the relative system sensitivity to dynamic fading: sweep of
i i b
the notch offset frequency
12a Illustration of sweep waveform for the measurement of the system sensitivity to
dynamic fading: sweep of the relative echo amplitude
12b Graphical representation of the relative system sensitivity to dynamic fading: sweep of
the relative echo amplitude
835-2-8 Amend. 1 © IEC:1996 – 5–
Page 23
Replace the title and text of clause 5 by the following new title and text:
5 Measurement of dynamic fading effects
5.1
Definition and general consideration
The radio channel, being subject to multipath propagation, is not time-invariant. Therefore it is
important to evaluate the ability of the system to cope with fast events (movements of notches)
in the channel by simulating rapid changes of propagation conditions.
The general approach in testing system sensitivity to dynamic selective fading is firstly to
sweep the notch offset frequency while slowly increasing the notch depth, and secondly to
sweep the relative echo amplitude while slowly decreasing the magnitude of the notch offset
frequency (see figure 10).
5.2 Method of measurement
The basic arrangement for this measurement is derived from that in the measurement of the
signature as shown in figure 3.
5.2.1 Sweep of the notch offset frequency
This method allows the behaviour of the system to be tested as the notch crosses the radio
channel.
The notch offset frequency is swept with a triangular waveform in order to maintain a constant
speed over the band under consideration (see figure 11a). The sweep width is chosen to be
large enough (e.g. twice the symbol rate) to include the outage signature (measured as in 3.2),
and to avoid the possible measurement errors due to the discontinuities at the edges of the
sweep range.
The measurement
...