SIST EN 300 831:2002

• Abstract:

  This ETS together with ETS 300 733 and ETS 300 734 covers the assessment of S-PCN handheld earth stations under the MSS and may be used to demonstrate presumption of compliance with the protection requirements of the EMC Directive.

• Status: Published
• Publication Date: 31-Aug-2002
• Withdrawal Date: 31-Aug-2001
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2002
• Due Date: 01-Sep-2002
• Completion Date: 01-Sep-2002
• Mandate: T-353
• Ref Project: ETSI EN 300 831 V1.1.1 (1998-03) - Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) for Mobile Earth Stations (MES) used within Satellite Personal Communications Networks (S-PCN) operating in the 1,6/2,4 GHz and 2 GHz frequency bands

SIST EN 300 831:2002 is the Slovenian standard identical to EN 300 831 V1.1.1 from ETSI. It sets EMC test methods, limits, and minimum performance criteria for Mobile Earth Stations (MES) used in Satellite Personal Communications Networks (S-PCN) in the 1,6/2,4 GHz and 2 GHz bands, together with their associated ancillary equipment. Manufacturers, test laboratories, and approval bodies use it to assess whether S-PCN MES equipment meets the EMC-related requirements for market access and presumption of compliance with the EMC Directive.

What does SIST EN 300 831:2002 specify?

SIST EN 300 831:2002 specifies how to assess the EMC performance of MES used in S-PCN, and it does so for the MES part of a multimode terminal when the terminal is operating in S-PCN mode. The standard also covers ancillary equipment connected to the MES.

The document is organized into:

• scope, references, definitions and abbreviations
• general test conditions
• performance assessment and performance criteria
• applicability overview tables
• emission test methods and limits
• immunity test methods and levels
• annexes for compliance, scope definitions, and bibliography

It excludes the antenna-port and enclosure-port emission specifications that are handled in the relevant product ETS. It also separates EMC compliance from licensing or service-use authorizations.

Annex	What it covers
Annex A	Normative mapping of clauses relevant to the essential requirements of Council Directive 89/336/EEC
Annex B	Normative definitions of MES within scope, split into the 1,6/2,4 GHz band and the 2,0 GHz band
Annex C	Informative bibliography

What are the key requirements of SIST EN 300 831:2002?

SIST EN 300 831:2002 focuses on declaring the equipment configuration correctly, testing it in realistic operating conditions, and judging it against pass/fail criteria that reflect communication quality and safe operation.

Declared configuration and equipment class

The applicant has to declare the intended use, the equipment class, the operational frequency range, the port list, the ancillary equipment or host equipment used for tests, the normal user-control functions, and the method used to assess quality of transmission. In practice, the test house needs this information to build a representative setup and to record it in the test report.

The MES is classified as:

• Vehicle mounted MES (V-MES)
• Portable MES (P-MES)
• Fixed MES (F-MES)

This matters because the test applicability differs by class, especially for power ports and vehicular disturbance tests.

Test setup and operating state

The equipment is tested as close as possible to normal intended use, within the declared environmental range for humidity, temperature, and supply voltage. If the equipment has an integral antenna, the antenna is fitted in the normal way. If the MES uses a host equipment, the applicant selects either a combined-equipment approach or a test jig approach.

The test arrangement also has to support normal operation and quality-of-transmission checks. The standard uses a Special Test Equipment (STE) and a Quality of Transmission Measurement Apparatus (QTMA) so the MES can be driven through carrier-on, carrier-off, and transmission-disabled states. In practice, this means the test setup has to let the laboratory verify that the link stays usable while the EMC disturbance is applied.

Emission tests

SIST EN 300 831:2002 requires emission checks on the enclosure of ancillary equipment, on DC power input/output ports, and on AC mains power ports where applicable. The emission measurements use the methods in EN 55022, with CISPR 16-1 used for the DC-port measurement arrangement.

The practical point is that the tester checks whether the equipment puts excessive disturbance back onto its own enclosure or supply lines. For equipment with long DC or AC power leads, the power-port test becomes relevant because those cables can behave like emission paths.

Immunity tests

The immunity part covers radiated RF fields, electrostatic discharge, fast transients, RF common-mode disturbance, vehicle transients and surges, voltage dips and interruptions, and AC mains surges. The test methods are taken from EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-6, EN 61000-4-11, EN 61000-4-5, and ISO 7637-1 / ISO 7637-2.

The practical effect is that the MES is exercised against the kinds of disturbances it may face in residential, commercial, light industrial, and vehicular environments. The standard also uses cable-length conditions to decide whether some ports are in scope for certain conducted tests.

Pass/fail criteria

The document uses two performance criteria:

• Continuous Phenomena (CP)
• Transient Phenomena (TP)

For CP, the communications link must stay up during exposure, the quality of transmission must remain at or above the declared level, the equipment must keep its user-control functions and stored data, and the transmitter must not operate unintentionally. For TP, the same end-of-test expectations apply, but the link may be re-established after an individual transient exposure when the test method allows it.

This matters because EMC compliance is judged against actual service behavior, not only against the absence of hardware damage.

What terms does SIST EN 300 831:2002 define?

SIST EN 300 831:2002 defines the main actors and test states used throughout the standard.

• Mobile Earth Station (MES) - The terminal under assessment, used in an S-PCN and capable of transmit and receive operation.
• ancillary equipment - Equipment used with a MES to add operating or control features, but not able to provide MES user functions on its own.
• host equipment - Equipment that gives full user functionality by itself, and to which the MES must connect to provide extra functions.
• Equipment Under Test (EUT) - The MES in the selected test configuration, including the ancillary equipment chosen for the assessment.
• Special Test Equipment (STE) - Test equipment used to put the MES into normal operating mode and provide the wanted receive signal.
• Quality of Transmission Measurement Apparatus (QTMA) - The measuring setup used to judge communication quality such as BER, audio signal quality, or message throughput.
• Continuous Phenomena (CP) - The performance criterion used for disturbance that lasts long enough to check operation during exposure.
• Transient Phenomena (TP) - The performance criterion used for short-duration disturbances where recovery after the event is part of the assessment.

Who uses SIST EN 300 831:2002?

SIST EN 300 831:2002 is used by MES manufacturers, test laboratories, conformity assessment bodies, and market-access teams working on S-PCN terminals. It is also relevant to suppliers and authorized representatives who prepare technical files and test submissions.

In practice, the document helps teams decide:

• how to classify the equipment
• which ports and configurations need testing
• how to set up the communication link during EMC testing
• what to record in the test report
• how to argue EMC-related compliance for European market assessment

Which standards are used with SIST EN 300 831:2002?

SIST EN 300 831:2002 relies on a set of generic EMC and vehicle-disturbance standards for test methods, limits, and environmental assumptions.

Standard	Contribution to SIST EN 300 831:2002
EN 50081-1	Generic emission basis for residential, commercial, and light industrial environments
EN 50082-1	Generic immunity basis for residential, commercial, and light industrial environments
ISO 7637-1	Transient conduction tests for 12 V vehicle systems
ISO 7637-2	Transient conduction tests for 24 V vehicle systems
EN 55022	Emission methods and limits used for enclosure and power-port tests
CISPR 16-1	Measurement apparatus and methods for radio disturbance measurements
EN 61000-4-2	Electrostatic discharge immunity test
EN 61000-4-3	Radiated RF field immunity test
EN 61000-4-4	Fast transient/burst immunity test
EN 61000-4-5	Surge immunity test
EN 61000-4-6	Conducted RF immunity test
EN 61000-4-11	Voltage dips, short interruptions, and voltage variation immunity
ETR 238	Guidance used in the ETSI/CENELEC harmonized standards work
89/336/EEC	The EMC Directive referenced for essential requirements
ETS 300 733 / ETS 300 734	Companion product ETS standards used with this document for S-PCN assessment

What does the SIST EN 300 831:2002 document contain?

The document contains detailed test configurations, including how to arrange the EUT, STE, QTMA, antennas, ports, and representative cables. It also includes a figure showing the types of ports on the apparatus and a suggested test configuration for emission and immunity work.

It provides separate clauses for emission and immunity, plus overview tables that show which tests apply to which equipment class and port type. The emission clauses point to port-specific test methods and limits, while the immunity clauses set the disturbance type, test method, and performance criterion for each case.

The annexes add the parts that are useful for compliance work: Annex A links clauses to the EMC Directive, Annex B defines the MES variants in scope, and Annex C points to the supporting literature. In practice, the document is used for design verification, type testing, and technical documentation before market placement.

SLOVENSKI STANDARD
01-september-2002
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Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic
Compatibility (EMC) for Mobile Earth Stations (MES) used within Satellite Personal
Communications Networks (S-PCN) operating in the 1,6/2,4 GHz and 2 GHz frequency
bands
Ta slovenski standard je istoveten z: EN 300 831 Version 1.1.1
ICS:
33.060.30 Radiorelejni in fiksni satelitski Radio relay and fixed satellite
komunikacijski sistemi communications systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 300 831 V1.1.1 (1998-03)
European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
ElectroMagnetic Compatibility (EMC)
for Mobile Earth Stations (MES) used within
Satellite Personal Communications Networks (S-PCN)
operating in the 1,6/2,4 GHz and 2 GHz frequency bands
European Telecommunications Standards Institute

2 EN 300 831 V1.1.1 (1998-03)
Reference
DEN/ERM-EMC-024 (7p000ico.PDF)
Keywords
EMC, radio, SPCN, testing
ETSI Secretariat
Postal address
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[e-mail]
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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 1998.
All rights reserved.
3 EN 300 831 V1.1.1 (1998-03)
Contents
Intellectual Property Rights.5
Foreword .5
1 Scope.6
2 References.6
3 Definitions and abbreviations .7
3.1 Definitions . 7
3.2 Abbreviations. 8
4 General test conditions.9
4.1 Test conditions. 9
4.2 Arrangements for tests . 9
4.3 RF connection of test signals . 10
5 Performance assessment .10
5.1 General information to be provided by the applicant. 10
5.2 Equipment classification. 11
5.3 Ancillary equipment. 11
5.4 MES connected to host equipment. 11
5.4.1 Alternative A: combined equipment. 11
5.4.2 Alternative B: use of a test jig . 11
5.5 Equipment configuration(s) . 12
6 Performance criteria.12
6.1 General. 12
6.2 Performance criteria for Continuous Phenomena (CP). 13
6.3 Performance criteria for Transient Phenomena (TP) . 13
7 Applicability overview tables .13
7.1 Emission . 13
7.2 Immunity. 14
8 Test methods and limits for emission tests of EUT .14
8.1 Test configuration. 14
8.2 Ancillary equipment enclosure. 15
8.2.1 Purpose. 15
8.2.2 Test method. 15
8.2.3 Test limit . 15
8.3 DC power input/output port . 15
8.3.1 Purpose. 15
8.3.2 Test method. 15
8.3.3 Test limit . 15
8.4 AC mains power input/output port. 16
8.4.1 Purpose. 16
8.4.2 Test method. 16
8.4.3 Test limit . 16
9 Test methods and levels for immunity tests for EUT .17
9.1 Test configuration. 17
9.2 Radio frequency electromagnetic field (80 MHz - 1 000 MHz) . 17
9.2.1 Purpose. 17
9.2.2 Test method and level . 17
9.2.3 Performance criteria . 17
9.3 Electrostatic discharge . 18
9.3.1 Purpose. 18
9.3.2 Test method and levels. 18
9.3.3 Performance criteria . 18

4 EN 300 831 V1.1.1 (1998-03)
9.4 Fast transients common mode. 18
9.4.1 Purpose. 18
9.4.2 Test method and levels. 18
9.4.3 Performance criteria . 18
9.5 RF common mode (0,15 MHz - 80 MHz). 19
9.5.1 Purpose. 19
9.5.2 Test method and level . 19
9.5.3 Performance criteria . 19
9.6 Transients and surges, vehicular environment . 19
9.6.1 Purpose. 19
9.6.2 Test method and level . 19
9.6.3 Performance criteria . 20
9.7 Voltage dips and interruptions . 20
9.7.1 Purpose. 21
9.7.2 Test method and levels. 21
9.7.3 Performance criteria . 21
9.8 Surges, common and differential mode. 21
9.8.1 Purpose. 21
9.8.2 Test method and levels. 21
9.8.3 Performance criteria . 21
Annex A (normative): Subclauses of the present document relevant for compliance with the
essential requirements of relevant EC Council Directives .22
Annex B (normative): Definitions of the MES within the scope of the present document.23
B.1 MESs operating within 1,6/2,4 GHz band .23
B.2 MESs operating within 2,0 GHz band .23
Annex C (informative): Bibliography.24
History.25

5 EN 300 831 V1.1.1 (1998-03)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of
ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSI
Web server (http://www.etsi.fr/ipr).
Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No
guarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates on
http://www.etsi.fr/ipr) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document is based upon the Generic Standards EN 50081-1 and EN 50082-1. Other standards cover radio
communications equipment not listed in the scope of the present document.
The present document has been produced by ETSI in response to a mandate from the European Commission issued
under Council Directive 83/189/EEC (as amended) laying down a procedure for the provision of information in the field
of technical standards and regulations.
The present document, together with ETS 300 733 or ETS 300 734 as appropriate, is intended to become a Harmonized
Standard, the reference of which will be published in the Official Journal of the European Communities referencing the
Council Directive on the approximation of the laws of the Member States relating to electromagnetic compatibility ("the
EMC Directive") (89/336/EEC as amended).
Technical specifications relevant to the EMC Directive are given in annex A.
National transposition dates
Date of adoption of this EN:
6 February 1998
Date of latest announcement of this EN (doa): 31 May 1998
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 November 1998
Date of withdrawal of any conflicting National Standard (dow): 30 November 1998

6 EN 300 831 V1.1.1 (1998-03)
1 Scope
The present document covers the assessment of Mobile Earth Stations (MES) used within Satellite Personal
Communications Networks (S-PCN), and ancillary equipment in respect of ElectroMagnetic Compatibility (EMC).
Technical specifications related to the antenna port and emissions from the enclosure port of the equipment are not
included in the present document. Such specific technical specifications are found in the relevant product ETS.
The present document specifies the applicable EMC tests, the test methods, the limits, and the minimum performance
criteria for digital radio equipment as defined in annex B, operating in the frequency ranges 1,6/2,4 GHz and 2 GHz,
and for the associated ancillary equipment.
In addition to the technical specification of the present document, there may be published in the Official Journal of the
European Communities (OJEC) references to Harmonized EMC standards that apply to the products covered by the
present document in their own right, for example EN 61000-3-2 and EN 61000-3-3 (power frequency harmonics and
voltage fluctuation).
The environment classification used in the present document refers to the environment classification used in the Generic
Standards EN 50081-1 [1] and EN 50082-1 [2], except the vehicular environment class which refers to ISO 7637–1 [3].
The EMC requirements have been selected to ensure an adequate level of compatibility for apparatus at residential,
commercial, light industrial and vehicular environments. The levels, however, do not cover extreme cases which may
occur in any location but with a low probability of occurrence.
The present document may not cover those cases where a potential source of interference, which is producing
individually repeated transient phenomena, or a continuous phenomenon, is permanently present, e.g. a radar or
broadcast site in the near vicinity. In such a case it may be necessary to use special protection applied to either the
source of interference, or the interfered part, or both.
For a multimode radio station, the present document only applies to the radio station when operated in the S-PCN mode.
Compliance of S-PCN Mobile Earth Stations (MES) radio equipment to the requirements of the present document does
not signify compliance to any requirements related to the use of the equipment (i.e. licensing requirements).
The present document is based on the considerations and guidance given in ETR 238 [13].
2 References
References may be made to:
a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in
which case, subsequent revisions to the referenced document do not apply; or
b) all versions up to and including the identified version (identified by "up to and including" before the version
identity); or
c) all versions subsequent to and including the identified version (identified by "onwards" following the version
identity); or
d) publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] EN 50081-1 (1992): "Electromagnetic compatibility - Generic emission standard - Part 1:
Residential, commercial and light industry".
[2] EN 50082-1 (1993): "Electromagnetic compatibility - Generic immunity standard - Part 1:
Residential, commercial and light industry".

7 EN 300 831 V1.1.1 (1998-03)
[3] ISO 7637-1 (1990): "Road vehicles - Electrical disturbance by conduction and coupling - Part 1:
Passenger cars and light commercial vehicles with nominal 12 V supply voltage - Electrical
transient conduction along supply lines only".
[4] ISO 7637-2 (1990): "Road vehicles - Electrical disturbance by conduction and coupling - Part 2:
Commercial vehicles with nominal 24 V supply voltage - Electrical transient conduction along
supply lines only".
[5] EN 55022 (1994): "Limits and methods of measurement of radio disturbance characteristics of
information technology equipment".
[6] CISPR 16-1: "Specification for radio disturbance and immunity measuring apparatus and methods
- Part 1: Radio disturbance and immunity measuring apparatus".
[7] EN 61000-4-2: "Electromagnetic compatibility (EMC) - Part 4: Testing and measurement
techniques - Section 2: Electrostatic discharge immunity test".
[8] EN 61000-4-3 (modified): "Electromagnetic compatibility (EMC) - Part 4: Testing and
measurement techniques - Section 3: Radiated, radio-frequency, electromagnetic field immunity
test".
[9] EN 61000-4-4: "Electromagnetic compatibility (EMC) - Part 4: Testing and measurement
techniques - Section 4: Electrical fast transient/burst immunity test".
[10] EN 61000-4-6: "Electromagnetic compatibility (EMC) - Part 4: Testing and measurement
techniques - Section 6: Immunity to conducted disturbances, induced by radio-frequency fields".
[11] EN 61000-4-11: "Electromagnetic compatibility (EMC) - Part 4: Testing and measurement
techniques - Section 11: Voltage dips, short interruptions and voltage variations immunity tests".
[12] EN 61000-4-5: "Electromagnetic compatibility (EMC) - Part 4: Testing and measurement
techniques - Section 5: Surge immunity test".
[13] ETR 238: "ETSI/CENELEC standardization programme for the development of Harmonized
Standards related to Electro-Magnetic Compatibility (EMC) in the field of telecommunications".
[14] 89/336/EEC: "Council Directive on the approximation of the laws of the Member States relating to
electromagnetic compatibility".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
ancillary equipment: Equipment (apparatus), where used in connection with a MES is considered as an ancillary
equipment (apparatus) if:
- the equipment is intended for use in conjunction with a MES to provide additional operational and/or control
features to the MES (e.g. to extend control to another position or location); and
- the equipment cannot be used on a stand alone basis to provide MES user functions independently of a MES; and
- the absence of the ancillary equipment does not inhibit the operation of the MES.
applicant: A party seeking an approval, or to place an S-PCN MES on the European market, i.e. the manufacturer of the
equipment, or his authorized representative, or an equipment supplier to the European market.
carrier-on state (allocated a channel): An MES is in this state when it is transmitting a signal in a continuous or a non-
continuous mode.
8 EN 300 831 V1.1.1 (1998-03)
carrier-off state (idle mode): An MES is in this state when it is powered-on but not transmitting a signal, i.e. not in a
carrier-on state.
enclosure port: The physical boundary of the apparatus through which an electromagnetic field may radiate or impinge
(see figure 1).
host equipment: Any equipment which has complete user functionality when not connected to the MES, and to which
connection is necessary for the MES to offer additional functionality.
Installable Equipment (IE), Internally Mounted Equipment (IME) and Externally Mounted Equipment (EME):
An Installable Equipment (IE) is an equipment which is intended to be installed in a vehicle. An IE may consist of one
or several modules. The IE is composed of modules intended to be externally mounted and declared by the applicant as
Externally Mounted Equipment (EME). The remaining module(s) are defined as Internally Mounted Equipment (IME).
integral antenna: An antenna which may not be removed during the tests, according to the applicant statement.
multimode: Indicates equipment that accommodates radio stations of different radio systems.
port: A particular interface of the specified equipment (apparatus) with the electromagnetic environment (see figure 1).
Enclosure port
Signal / control port
AC power port
APPARATUS
Antenna port
DC power port Earth port
Figure 1: Examples of ports
Portable Equipment: A Portable Equipment (PE) is generally intended to be self-contained, free standing and portable.
A PE would normally consist of a single module, but may consist of several interconnected modules.
NOTE: More than one of the equipment classifications can apply to certain equipment, as described in
subclause 5.2, dependent upon the applicant's declaration of normal intended use.
removable antenna: An antenna which may be removed for the test according to the applicant statement.
transmission disabled state: A MES is in this state when it is not authorized to transmit by the Network Control
Facilities (NCF).
12V DC power input port: A power input port on a V-MES designed for connection to a nominal 12V main vehicle
battery.
24V DC power input port: A power input port on a V-MES designed for connection to a nominal 24V main vehicle
battery.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
BER Bit Error Ratio
CMF Control and Monitoring Functions
CP performance criteria for Continuous Phenomena
EIRP Equivalent Isotropically Radiated Power
EMC ElectroMagnetic Compatibility
EME Externally Mounted Equipment
EUT Equipment Under Test
F-MES Fixed MES
IE Installable Equipment
IME Internally Mounted Equipment

9 EN 300 831 V1.1.1 (1998-03)
LISN Line Impedance Stabilizing Network
MES Mobile Earth Station
NCF Network Control Facilities
P-MES Portable MES
PE Portable Equipment
PEP Peak Envelope Power
QTMA Quality of Transmission Measurement Apparatus
RF Radio Frequency
rms root mean square
STE Special Test Equipment
S-PCN Satellite Personal Communications Network
TP performance criteria for Transient Phenomena
V-MES Vehicle mounted MES
4 General test conditions
4.1 Test conditions
For MESs with ancillary equipment and/or various ports, the number of test configurations shall be determined. The
assessment shall include sufficient representative configurations of the MES to adequately exercise the equipment.
These configurations shall be recorded in the test report.
In the following clauses, the Equipment Under Test (EUT) is the MES with the selected configuration of ancillary
equipment.
The equipment shall be tested under conditions which are within the applicant's declared range of humidity,
temperature, and supply voltage.
The EUT operational frequencies used during the test, shall be recorded in the test report.
The test conditions shall be recorded in the test report.
The test configuration shall be as close to normal intended use as possible, and shall be recorded in the test report.
For testing and if physically separated from the MES, any voltage converter shall form part of the EUT.
Whenever the Equipment Under Test (EUT) is provided with an integral antenna, the EUT shall be tested with the
antenna fitted in a manner typical of normal intended use.
For MES for which connection to a host equipment is necessary to offer additional functionality, the test configuration
shall be as defined in subclause 5.4.
4.2 Arrangements for tests
In order to measure the system emission and electromagnetic immunity under operational conditions, proper
arrangements shall be provided (by the applicant), e.g.:
a) a Special Test Equipment (STE) to put the MES terminal in its normal operating mode, and providing the MES
with a receive signal to emulate the operational conditions of reception. This equipment shall control the EUT,
when it is capable of transmission, so that it switches between the transmission disabled, carrier-on and carrier-
off states;
b) a specific Quality of Transmission Measurement Apparatus (QTMA).
EXAMPLE: The quality of transmission can concern:
- the audio signal;
- the BER;
10 EN 300 831 V1.1.1 (1998-03)
- the message throughput;
- the continuity of the communication link; or
- a combination of them.
For the measurement of the quality of transmission, a communications link shall be established and the wanted input
signal shall be applied to the Radio Frequency (RF) input of the receiver. Signal level adjustment may be performed by
adjustment of the test transmitter output level such that the received signal level is as close to the normal operation
signal level as possible. This signal level should be sufficient to avoid the broad band noise from the power amplifiers
generating the EMC disturbance from influencing the measurement.
Adequate measures shall be taken to avoid the effects of the unwanted signal on the measuring equipment.
The Special Test Equipment (STE), the QTMA and the source of the wanted input signal shall be located outside the
test environment. Adequate measures shall be taken to protect them from the effects of all the radiated fields within the
test environment.
For the quality of transmission measurement the MES may be put in a specific mode for that test where the received data
are looped back to the transmitter.
4.3 RF connection of test signals
Where the equipment incorporates an external antenna connector, and when agreed by the applicant the antenna shall be
removed and the wanted signal to establish communications shall be delivered through that connector by a coaxial cable.
Adequate measures shall be taken to minimize the effect of unwanted currents on the external conductor of the coaxial
cable at the point of entry to the equipment. Adequate measures shall also be taken to avoid the effect of the unwanted
signal on the measuring equipment.
Where the equipment incorporates an external antenna connector, the applicant may consider it as an integral antenna
for the purpose of testing.
The test system shall be located outside of the test environment.
Where the equipment does not incorporate an external RF connector, the wanted signal to establish communications
shall be delivered from the equipment to an antenna locate
...