EN 60835-3-6:1996

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurements on satellite earth stations - Section 6: High power amplifiers

Defines and describes the measurements normally carried out on high-power amplifiers used in satellite earth station transmitters.

Meßverfahren für Geräte in digitalen Mikrowellen- Funkübertragungssystemen - Teil 3: Messungen an Satelliten-Erdfunkstellen - Hauptabschnitt 6: Hochleistungsverstärker

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 6: Amplificateurs de puissance

Définit et décrit les mesures à effectuer normalement sur les amplificateurs de puissance utilisées sur les émetteurs de stations terriennes de télécommunications par satellite.

Methods of measurement for equipment used in digital microwave radio transmission systems - Part 3: Measurements on satellite earth stations - Section 6: High power amplifiers (IEC 60835-3-6:1996)

General Information

• Status: Withdrawn
• Publication Date: 25-Jul-1996
• Withdrawal Date: 31-Mar-1997
• 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 60835-3-6:2002 - Methods of measurement for equipment used in digital microwave radio transmission systems -- Part 3: Measurements on satellite earth stations -- Section 6: High power amplifiers

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2002
Methods of measurement for equipment used in digital microwave radio
transmission systems - Part 3: Measurements on satellite earth stations - Section
6: High power amplifiers (IEC 60835-3-6:1996)
Methods of measurement for equipment used in digital microwave radio transmission
systems -- Part 3: Measurements on satellite earth stations -- Section 6: High power
amplifiers
Meßverfahren für Geräte in digitalen Mikrowellen- Funkübertragungssystemen -- Teil 3:
Messungen an Satelliten-Erdfunkstellen -- Hauptabschnitt 6: Hochleistungsverstärker
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 6: Amplificateurs de puissance
Ta slovenski standard je istoveten z: EN 60835-3-6:1996
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
60835-3-6
INTERNATIONAL
Première édition
STANDARD
First edition
1996-03
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 6: Amplificateurs de puissance
Methods of measurement for equipment used in
digital microwave radio transmission systems
Part 3:
Measurements on satellite earth stations
Section 6: High-power amplifiers
© IEC 1996 Droits de reproduction réservés — Copyright - all rights reserved
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835-3-6 © IEC:1996 - 3 -
CONTENTS
Page
FOREWORD 5
INTRODUCTION
Clause
1 Scope 9
2 Normative references 9
3 Power gain and efficiency 9
4 Return loss 13
5 Spurious signals 13
6 Amplitude/frequency characteristics 13
7 Group-delay/frequency characteristic 13
8 Amplitude modulation/phase modulation conversion factor 15
Intermodulation products
9 15
10 Unwanted radiation (leakage) 17
Figures
1 Arrangement for gain stability measurement 19
2 Arrangement for intermodulation products measurement 21
3 Illustration of intercept point 21
4 Arrangement for unwanted r.f. radiation measurements 23

835-3-6 © IEC:1996 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
METHODS OF MEASUREMENT FOR EQUIPMENT
USED IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS –
Part 3: Measurements on satellite earth stations –
Section 6: High-power amplifiers
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of the IEC on technical matters, express as nearly as possible an
international consensus of opinion on the relevant subjects since each technical committee has
representation from all interested National Committees.
3)
The documents produced have the form of recommendations for international use and are published in the
form of standards, technical reports or guides and they are accepted by the National Committees in that
sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5)
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the
subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 835-3-6 has been prepared by subcommittee 12E: Radio
relay and satellite communication systems, of IEC technical committee 12: Radio-
communications.
The text of this standard is based on the following documents:
FDIS Report on voting
12E/258/FDIS 12E/265/RV D
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.

835-3-6 © IEC:1996 - 7 -
INTRODUCTION
Power amplifiers need to deliver a microwave signal of sufficient output power. This signal
should be produced with maximum efficiency and reliability and with minimum distortion.
Generally, there are two categories of amplifiers, tubes and semiconductor devices.
Among the tubes, klystrons and travelling-wave tubes (TWT) are the most frequently
employed; semiconductor amplifiers normally include field-effect transistors (FET).
Travelling-wave tubes (TWT) and GaAs-field-effect transistors (FET) are most frequently
used in satellite earth stations.
Power amplifiers should have a flat gain over the specified bandwidth to avoid altering the
overall transfer characteristics of a system. They should also be as linear as possible to
avoid generation of sidelobes in the power spectrum and to limit adjacent channel
interference.
Finally, low AM to PM conversion and low intermodulation products are necessary to limit
the degradation caused by non-linearities.

835-3-6 © IEC:1996 - 9 -
METHODS OF MEASUREMENT FOR EQUIPMENT
USED IN DIGITAL MICROWAVE RADIO TRANSMISSION SYSTEMS –
Part 3: Measurements on satellite earth stations –
Section 6: High-power amplifiers
1 Scope
This section of IEC 835-3 defines and describes the measurements normally carried out
on high-power amplifiers used in satellite earth station transmitters.
2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this section of IEC 835-3. At the time of publication, the
editions indicated were valid. All normative documents are subject to revision, and pa rties
to agreements based on this section of IEC 835-3 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated
below. Members of IEC and ISO maintain registers of currently valid International
Standards.
IEC 835-1-2: 1992, 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
IEC 835-1-3: 1992,
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 3: Transmission characteristics
3 Power gain and efficiency
3.1 Input and output power
See IEC 835-1-2.
Special care shall be taken to exclude from the measurement non-useful signals such as
harmonics of the desired frequency. A low-pass filter of known inse rtion loss at the
measurement frequency shall be connected between the power meter and the
measurement point if not already included in the amplifier under test.
NOTE - Some amplifiers are subject to damage if driven to excessive output power, therefore it may be
necessary to limit the drive level during th
...