ETSI ETS 300 333 ed.1 (1994-12)

Satellite Earth Stations and Systems (SES); Receive-only Very Small Aperture Terminals (VSATs) used for data distribution operating in the 4 GHz frequency band

DE/SES-02005

Satelitske zemeljske postaje in sistemi (SES) - Sprejemni satelitski terminali z zelo majhno antensko odprtino (VSATs), ki se uporabljajo za distribucijo podatkov in delujejo v frekvenčnem pasu 4 GHz

General Information

• Status: Published
• Publication Date: 14-Dec-1994
• Technical Committee: SES 2 - RF and IF Equipment
• Current Stage: 12 - Completion
• Due Date: 28-Nov-1994
• Completion Date: 15-Dec-1994
• Ref Project: SIST ETS 300 333 E1:2006 - Satellite Earth Stations and Systems (SES); Receive-only Very Small Aperture Terminals (VSATs) used for data distribution operating in the 4 GHz frequency band

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 333 E1:2006
01-februar-2006
6DWHOLWVNH]HPHOMVNHSRVWDMHLQVLVWHPL6(66SUHMHPQLVDWHOLWVNLWHUPLQDOL]]HOR
PDMKQRDQWHQVNRRGSUWLQR96$7VNLVHXSRUDEOMDMR]DGLVWULEXFLMRSRGDWNRYLQ
GHOXMHMRYIUHNYHQþQHPSDVX*+]
Satellite Earth Stations and Systems (SES); Receive-only Very Small Aperture Terminals
(VSATs) used for data distribution operating in the 4 GHz frequency band
Ta slovenski standard je istoveten z: ETS 300 333 Edition 1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST ETS 300 333 E1:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 333 E1:2006

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SIST ETS 300 333 E1:2006
EUROPEAN ETS 300 333
TELECOMMUNICATION December 1994
STANDARD
Source: ETSI TC-SES Reference: DE/SES-02005
ICS: 33.060.30
VSAT, Receive
Key words:
Satellite Earth Stations and Systems (SES);
Receive-only Very Small Aperture Terminals (VSATs)
used for data distribution
operating in the 4 GHz frequency band
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1994. All rights reserved.
New presentation - see History box

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ETS 300 333: December 1994
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 333: December 1994
Contents
Foreword .5
1 Scope .7
2 Normative references.8
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .9
4 Test report.9
5 Safety .9
5.1 Mechanical construction .9
5.2 Electrical safety.11
5.2.1 Power voltages.11
5.2.2 Lightning.11
5.3 Solar radiation protection.12
6 Radio Frequency (RF).12
6.1 Spurious radiation.12
6.2 Electromagnetic immunity.13
7 Antenna receive gain pattern (co-polar and cross-polar) .13
8 Receive polarisation discrimination.14
9 Electromagnetic immunity .15
10 Mechanical .15
10.1 Pointing stability .15
10.2 Antenna pointing accuracy capability.15
10.3 Linear polarisation angle alignment capability .16
11 Terrestrial interfaces .16
12 Control and monitoring.16
Annex A (normative): Spurious radiation outside main-beam - test procedure.17
A.1 Introduction.17
A.2 Measuring method.17
A.3 Equipment Under Test (EUT).18
A.4 Operating mode signal generation .18
A.5 Test site and test set-up.18
A.6 Measuring procedure below cut-off frequency .18
History.19

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ETS 300 333: December 1994
Foreword
This European Telecommunication Standard (ETS) has been produced by the Satellite Earth Stations and
Systems (SES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
Proposed transposition dates
Date of latest announcement of this ETS (doa): 31st March 1995
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30th September 1995
Date of withdrawal of any conflicting National Standard (dow): 30th September 1995

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ETS 300 333: December 1994
1 Scope
This European Telecommunication Standard (ETS) provides specifications for the standardisation of the
characteristics of receive-only Very Small Aperture Terminals (VSATs) operating as part of a satellite
network used for the distribution of data.
These VSATs have the following characteristics:
- operating in the shared part of the C band allocated to the Fixed Services (FS) and to the Fixed
Satellite Services (FSS), 3,625 to 4,200 GHz (Space-Earth);
- in this frequency band circular polarisation is normally used and the system operates through
satellites at 3° spacing;
- designed for unattended operation;
- limited to the reception of baseband digital signals;
- equipped with one or several terrestrial output ports;
- antenna diameter not exceeding normally 7,3 m, or equivalent corresponding aperture.
The equipment considered in this ETS comprises both the "outdoor unit", usually composed of the
antenna subsystem with the associated Low Noise Block (LNB), and the "indoor unit" composed of the
remaining part of the communication chain, including the cable between these two units.
This ETS does not contain any requirement, recommendation or information about the installation of the
VSATs, nor is this ETS intended to apply to VSAT network hub stations.
This ETS deals with two types of specification:
- specifications defined in order to protect other users of the frequency spectrum, both satellite and
terrestrial, from unacceptable interference. In addition, these specifications are specified for the
purposes of electrical safety, structural safety and solar radiation protection as well as protection
from harmful interference;
- specifications related to characteristics which contribute to the quality of reception by providing the
VSAT with a minimum interference protection from other radio systems.

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ETS 300 333: December 1994
2 Normative references
This ETS incorporates, by dated or undated references, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] IEC 950 (1991): "Safety of information technology equipment including electrical
business equipment".
[2] IEC 81 (Co) 6 (1981): "Standards for Lightning Protection of Structures".
[3] CISPR Publication No. 22 (March 1992): "Limits and methods of measurement
of radio interference characteristics of information technology equipment".
[4] CISPR Publication No. 16 (1987): "Specifications for radio interference
measuring apparatus and measurement methods".
[5] EN 55011 (1986): "Limits and methods of measurements of radio interference
characteristics of industrial, scientific and medical (ISM) radio-frequency
equipment".
[6] IEC 510-2-1 (1978): "Methods of measurement for radio equipment used in
satellite earth stations Part 2".
[7] IEC 801-3 (1984): "Electromagnetic compatibility for industrial process
measurement and control equipment Part 3".
[8] ITU-R 732 Recommendation (1992): "Method for statistical processing of Earth
station antenna side-lobe peaks".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply.
outdoor unit: Is the part of the terminal installed in a position within line of sight to the satellite(s) to be
received, and it is intended to be operated in outdoor environmental conditions.
It usually comprises three main parts:
a) the antenna sub-system which converts the incident radiation field into a guided wave;
b) the LNB, which is a device that amplifies, with very low internal noise, the received signals in the
Radio Frequency (RF) band and converts them to intermediate frequencies;
c) the installation equipment.
NOTE: The installation equipment (means of attachment) is not included in this ETS.
However, the antenna structures and other components directly mounted on the
antenna and forming an integral part of it, are subject to the specifications of this ETS.
indoor unit: Is composed of the remaining part of the equipment. It is generally installed inside the
buildings and is connected to the outdoor unit. The connection cable between the outdoor and indoor unit
belongs to the indoor unit.

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ETS 300 333: December 1994
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply.
CISPR Comité International Spécial des Perturbations Radioélectriques
CSPDN Circuit Switched Public Data Network
EIRP Equivalent Isotropically Radiated Power
EUT Equipment Under Test
FS Fixed Service
FSS Fixed Satellite Service
IEC International Electrotechnical Commission
ITU International Telecommunication Union
ITU-R ITU Radiocommunication Sector
LNB Low Noise Block (low noise amplifier and down converter)
RF Radio Frequency
VSAT Very Small Aperture Terminal
4 Test report
The test report shall contain the results of the tests.
5 Safety
5.1 Mechanical construction
Purpose:
Protection of operating personnel, the public and goods from insecure structures.
Specification:
This specification applies to the outdoor unit only.
The outdoor unit, including mounted and structural components, (but excluding the means of attachment)
shall be designed to support the following main loads due to:
- the weight of the antenna and structural components;
- the wind speed.
Loading due to snow and ice is not considered.
At wind speeds up to 180 km/h, referred to standard atmosphere temperature and pressure (293 K and
5
1,013 x 10 Pa (1 013 mbar)) none of the components shall be torn away.
Verification:
Two alternative methods are given for verification.
a) Wind tunnel testing.
A wind tunnel shall be used for the purpose of conformance testing. The wind tunnel tests shall be
performed on the outdoor unit, or alternatively on a scale-model of the outdoor unit. The data
obtained for the scale-model shall be computed in order to obtain data for the true antenna size.
b) Numerical analysis and simplified tests.
This method shall provide an alternative to the wind tunnel test. The effects of maximum wind load
shall be first computed on the overall outdoor unit using a numerical analysis method, e.g. finite
elements method by computer taking into account the intrinsic properties of the materials. In a
second step, the computed loads shall be applied to the structure.

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The purpose of the numerical analysis is twofold:
1) to show compliance with the specification under nominated conditions;
2) to compute equivalent static loads (force and torque) applied to the critical attachment points
of the structure, e.g.:
- reflector - mounting legs fixing point;
- reflector - struts;
- struts - LNB.
Test procedure:
a) Wind tunnel.
The test object shall be mounted in such a way, that wind load can be applied from all horizontal
directions in steps of 45°. The tests shall be carried out with the elevation angle of the antenna at its
minimum and at its maximum in turn. The wind load shall be increased gradually in steps up to 180
km/h, each step lasting approximately one minute.
The tests may be performed at any atmosphere temperature and air pressure. If the atmospheric
5
conditions differ from standard conditions (temperature = 293°K, air pressure = 1,013 x 10
Pa), then the test velocity shall be determined according to the formula:
5
VV××[(1,013 10 ) /P ]×[T / 293]
TS= T T
where: V = wind velocity in test;
T
V = wind velocity in standard conditions;
S
P = air pressure in test, (Pa);
T
T = temperature in test, (K).
T
During the load conditions the test object shall be observed and the distortions recorded.
The test report shall contain:
- description of the test equipment;
- description of the tests performed;
- results of the measurements or calculations on the mechanical loads transmitted from the
outdoor unit to the attachment devices.
For the pointing stability (see subclause 10.1):
- results of the measurements of the deviation of the antenna position, and components with
respect to each other.
b) Numerical analysis and tests.
The computations needed to derive the field of forces and torque and the equivalent static stresses
shall be carried out for the same wind directions and elevation as specified in the wind tunnel test
procedure a) above. Only the maximum 180 km/h shall be considered. The air related parameters,
...