SIST ETS 300 332:2000

SLOVENSKI STANDARD
SIST ETS 300 332:2000
01-maj-2000
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Satellite Earth Stations and Systems (SES); Transmit-only or transmit-and-receive Very
Small Aperture Terminals (VSATs) used for communications operating in the Fixed
Satellite Service (FSS) 6 GHz and 4 GHz frequency bands
Ta slovenski standard je istoveten z: ETS 300 332 Edition 2
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
SIST ETS 300 332:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 332:2000

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SIST ETS 300 332:2000
EUROPEAN ETS 300 332
TELECOMMUNICATION July 1997
STANDARD Second Edition
Source: ETSI TC-SES Reference: RE/SES-00012
ICS: 33.020
Key words: Satellite, earth station, VSAT, FSS
Satellite Earth Stations and Systems (SES);
Transmit-only or transmit-and-receive
Very Small Aperture Terminals (VSATs)
used for communications operating in the
Fixed Satellite Service (FSS) 6 GHz and 4 GHz frequency bands
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.fr
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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 1997. All rights reserved.

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ETS 300 332: July 1997
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 300 332: July 1997
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.10
5 Safety .10
5.1 Mechanical construction .10
5.2 Lightning .10
6 Radio Frequency (RF).11
6.1 Spurious radiation.11
6.2 On-axis spurious radiation .12
6.3 Transmit carrier centre frequency stability.13
6.4 Off-axis EIRP emission density (co-polar and cross-polar) within the band 5,850 GHz
to 6,650 GHz.13
6.5 Carrier suppression .14
6.6 Antenna transmit gain pattern (co-polar and cross-polar) .14
6.7 Transmit polarization discrimination (linear) or voltage axial ratio (circular).16
6.8 Antenna receive gain pattern (co-polar and cross-polar).16
6.9 Receive polarization discrimination.18
7 Mechanical .18
7.1 Pointing stability .18
7.2 Antenna pointing accuracy capability.19
7.3 Linear polarization angle alignment capability .19
8 Control and monitoring.19
History.20

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ETS 300 332: July 1997
Foreword
This second edition European Telecommunication Standard (ETS) has been produced by the Satellite
Earth Stations and Systems (SES) Technical Committee of the European Telecommunications Standards
Institute (ETSI).
Transposition dates
Date of adoption: 4 July 1997
Date of latest announcement of this ETS (doa): 31 October 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 April 1998
Date of withdrawal of any conflicting National Standard (dow): 30 April 1998

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ETS 300 332: July 1997
1 Scope
This European Telecommunication Standard (ETS) provides specifications for the standardization of the
characteristics of transmit-only or transmit-and-receive Very Small Aperture Terminals (VSATs) operating
as part of a satellite network (e.g. star, mesh or point-to-point) used for the distribution and/or exchange of
information between users.
In such a network a Centralised Control and Monitoring Function (CCMF) is responsible for the monitoring
and control of transmit-only and transmit-and-receive VSATs.
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), 5,850 GHz to 6,650 GHz (earth-to-space), 3,400 GHz to 4,200 GHz
(space-to-earth);
- in these frequency bands circular and linear polarization are normally used;
- the VSAT operates through geostationary satellites at least 3° away from any other geostationary
satellite operating in the same frequency band and covering the same area;
- designed usually for unattended operation;
- antenna diameter not exceeding 7,3 m, or equivalent corresponding effective area.
The equipment considered in this ETS comprises both the "outdoor unit", usually composed of the
antenna sub-system and associated power amplifier and 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 applies to the VSAT with its ancillary equipment and its various terrestrial ports, and operated
under the conditions which are within the ranges of humidity, temperature and supply voltage declared by
the manufacturer.
There are no EMC specifications under this ETS, however ETS 300 673 [3] contains the EMC
specifications for VSATs.
This ETS does not contain any specification or information on the installation of the VSATs.
The specifications have been selected to ensure an adequate level of compatibility for VSATs. The levels,
however, do not cover extreme cases which may occur in any location but with a low probability of
occurrence. In such a case it may be necessary to use special protection supplied to either the source of
interference, or the interfered part or both.
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 structural safety and lightning protection as well as protection from harmful
interference;
- specifications related to characteristics which contribute to the quality of reception by providing the
VSAT with minimum interference protection from other radio systems. These specifications apply if
required by the manufacturer.

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2 Normative references
This ETS incorporates, by dated or undated reference, 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] ITU-R Recommendation 732 (1992): "Method for statistical processing of earth
station antenna side-lobe peaks".
[2] EN 50083-1 (1993): "Cabled distribution systems for television and sound
signals - Part 1: Safety requirements".
[3] ETS 300 673 (1996): "Radio Equipment and Systems (RES); ElectroMagnetic
Compatibility (EMC) standard for 4/6 GHz and 11/12/14 GHz Very Small
Aperture Terminal (VSAT) equipment and 11/12/13/14 GHz Satellite News
Gathering (SNG) Transportable Earth Station (TES) equipment".
[4] ETS 300 456: "Satellite Earth Stations and Systems (SES); Test Methods for
Very Small Aperture Terminals (VSATs) operating in the 11/12/14 GHz
frequency bands".
[5] ETS 300 160: "Satellite Earth Stations and Systems (SES); Control and
monitoring functions at a Very Small Aperture Terminal VSAT".
[6] ETS 300 161: "Satellite Earth Stations and Systems (SES); Centralised control
and monitoring functions for VSAT networks".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
ancillary equipment: Equipment used in connection with the VSAT is considered ancillary if the three
following conditions are met:
a) the equipment is intended for use in conjunction with the VSAT to provide additional operational
and/or control features (e.g. to extend control to another position or location); and
b) the equipment cannot be used on a stand alone basis, to provide user functions independently of
the VSAT; and
c) the absence of the equipment does not inhibit the operation of the VSAT.
carrier-on state: A VSAT is in this state when it is authorized by the CCMF to transmit and when it
transmits a signal.
carrier-off state: A VSAT is in this state when it is authorized by the CCMF to transmit, but when it does
not transmit any signal.
NOTE 1: The existence of a carrier-off state depends on the system of transmission used.
For VSATs designed for continuous transmission mode there may be no carrier-off
state.
cross-polarization discrimination: The ratio of the on-axis co-polar gain to the cross-polar gain in a
given direction, at a transmit or receive frequency.
indoor unit: Is composed of that part of the VSAT which is not part of the outdoor unit. It is generally
installed inside a building and is connected to the outdoor unit. The connection cable between the outdoor
and indoor unit is considered part of the indoor unit.

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nominated bandwidth: The bandwidth of the VSAT radio frequency transmission is nominated by the
manufacturer. The nominated bandwidth is centred on the transmit frequency and does not exceed
5 times the occupied bandwidth.
NOTE 2: The nominated bandwidth is wide enough to encompass all spectral elements of the
transmission which have a level greater than the specified spurious radiation limits.
The nominated bandwidth is wide enough to take account of the transmit carrier
frequency stability. This definition is chosen to allow flexibility regarding adjacent
channel interference levels which will be taken into account by operational procedures
depending on the exact transponder carrier assignment situation.
occupied bandwidth: For a digital modulation scheme - the width of the signal spectrum 10 dB below the
maximum inband density. For an analogue modulation scheme - the width of a frequency band such that,
below the lower and above the upper frequency limits, the mean power emitted is equal to 0,5 % of the
total mean power of the emission.
outdoor unit: The part of the VSAT intended to be installed outdoor, as declared by the manufacturer, or
as indicated in the user documentation.
The outdoor unit usually comprises three main parts:
a) the antenna sub-system which converts the incident radiation field into a guided wave and
vice versa;
b) the Low Noise Block (LNB) down converter, 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 up converter and the power amplifier which convert from the intermediate frequency to RF and
amplify the low level signals for transmission through the antenna subsystem.
NOTE 3: The installation equipment (means of attachment) is outside the scope of 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.
spurious radiation: Any radiation outside the nominated bandwidth.
transmission disabled state: A VSAT is in this state when it is not authorized by the CCMF to transmit.
voltage axial ratio: The voltage axial ratio of an antenna at a transmit or a receive frequency is the ratio r
equal to (x + 1)/(x - 1) where x is the square root of the cross-polarization discrimination (not expressed in
dB).
3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
CCMF Centralised Control and Monitoring Functions
EIRP Equivalent Isotropically Radiated Power
EMC ElectroMagnetic Compatibility
FS Fixed Service
FSS Fixed Satellite Service
LNB Low Noise Block (low noise amplifier and down converter)
RF Radio Frequency
VSAT Very Small Aperture Terminal

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4 Test report
The test report shall be similar to the one specified in ETS 300 456 [4] and shall contain:
- the value of the nominated bandwidth declared by the manufacturer;
- the value of the nominated bandwidth shall not exceed 5 times the occupied bandwidth
ITU-R Recommendation 732 [1];
- the results of the tests;
- all operational conditions and parameters.
5 Safety
5.1 Mechanical construction
Purpose:
Protection of operating personnel, the public and goods from insecure structures of the VSAT itself.
Specification:
This specification applies to the outdoor unit only including mounted and structural components, and does
not apply to the means of attachment.
The outdoor unit, 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:
The test method specified in subclause 5.1 of ETS 300 456 [4] shall apply.
5.2 Lightning
Purpose:
To avoid dangerous potential differences between the outdoor unit and any other conductive structure.
Specification:
Means shall be provided to permit the attachment of bonding conductors of dimension indicated in
EN 50083-1 [2], subclause 10.2.3.
Verification:
The test method specified in subclause 5.2 of ETS 300 456 [4] shall apply.

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6 Radio Frequency (RF)
The test methods of ETS 300 456 [4] shall apply for verifications where applicable.
6.1 Spurious radiation
Purpose:
To limit the level of interference to terrestrial and satellite radio services.
Specification:
a) The VSAT shall not exceed the limits for radiated interference field strength over the frequency
range from 30 MHz to 1,0 GHz specified in table 1a.
Table 1a: Radiated field strength at a distance of 10 m
Frequency range MHz Quasi-peak limits
dB(μV/m
...