SIST ETS 300 680-1:1998
(Main)Radio Equipment and Systems (RES); ElectroMagnetic Compatibility (EMC) standard for Citizens Band (CB) radio and ancillary equipment (speech and/or non-speech); Part 1: Angle-modulated
- Abstract
This ETS together with ETS 300 135 covers the asessment of Citizen s Band radio equipment in respect of EMC and may be used to demonstrate presumption of compliance with the protection requirements of the EMC Directive. ETS covers angle modulated (FM) equipment.
- Status
- Published
- Publication Date
- 30-Sep-1998
- Technical Committee
- RES - Radio equipment and systems
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Oct-1998
- Due Date
- 01-Oct-1998
- Completion Date
- 01-Oct-1998
- Mandate
- T-353
SIST ETS 300 680-1:1998 is the Slovenian adoption of ETS 300 680-1 from ETSI. It specifies EMC tests, test methods, limits and minimum performance criteria for angle-modulated Citizens' Band (CB) radio equipment and associated ancillary equipment operating in the 26-28 MHz band. In practice, it is used to assess whether CB radio equipment can be tested for conformity with the EMC Directive together with ETS 300 135.
What does SIST ETS 300 680-1:1998 specify?
SIST ETS 300 680-1:1998 specifies the EMC assessment of angle-modulated CB radio equipment, including speech and non-speech equipment, and the ancillary equipment used with it. It covers the test conditions, emission and immunity tests, limits, and minimum performance criteria needed for assessment.
The scope states that the document applies to equipment operating in the 26-28 MHz range and to associated ancillary equipment. It also says the environmental classification follows EN 50081-1 and EN 50082-1, except for vehicular use, which follows ISO 7637.
The ETS is organized into:
- Clauses 1-3 - scope, normative references, definitions, symbols and abbreviations
- Clause 4 - general test conditions
- Clause 5 - performance assessment
- Clause 6 - performance criteria
- Clause 7 - applicability overview tables
- Clauses 8-9 - emission and immunity test methods and limits
- Annex A - clauses and subclauses relevant to the essential requirements of the EMC Directive
| Annex | What it covers |
|---|---|
| Annex A | Clauses and subclauses relevant for demonstrating conformity with the essential requirements of Council Directive 89/336/EEC |
The scope also makes two practical limits clear: compliance with this ETS does not mean compliance with licensing requirements, and it does not replace safety requirements. That matters because a product can pass EMC testing and still need separate regulatory and safety checks.
What are the key requirements of SIST ETS 300 680-1:1998?
SIST ETS 300 680-1:1998 requires testing to be done under declared operating conditions and as close as possible to normal use. The report must record the test conditions, the configuration, and the operating mode used, so the results can be repeated and defended in conformity assessment.
Test setup and reporting
Clause 4 requires tests to be carried out within the manufacturer’s declared humidity, temperature and supply-voltage range. For emission tests, the equipment should run in the mode that produces the highest emission in the band being checked, and CB radio equipment should be operated on one channel near the middle of the declared switching range.
For immunity tests, the transmitter is normally driven at maximum RF output power, or no less than 6 dB below that level if thermal limits are declared. The receiver and transmitter are tested with a communication link established at the start of the test, because link maintenance is the practical sign that the primary function still works.
Performance assessment and classes
Clause 5 and clause 6 divide CB radio equipment into two classes. Class 1 covers all CB equipment except integral antenna CB equipment; class 2 covers integral antenna CB equipment for portable use. This matters because the pass/fail criteria are different for the two classes.
The standard uses three performance criteria:
- A for continuous phenomena
- B for transient phenomena, including short voltage dips
- C for long voltage dips and power interruptions
For class 1 speech equipment, the audio quality is checked by SINAD, and the level must stay within the stated criterion during exposure. For class 1 non-speech equipment, the received data or messages must meet the stated acceptance level. For class 2 equipment, the communication link may be lost during testing, but lost functions must recover according to the declared criterion.
Emission and immunity by port
Clauses 8 and 9 apply different tests depending on the port and the equipment type. Emission testing covers the enclosure port of ancillary equipment tested separately, DC power input/output ports, and AC mains power input/output ports. The methods refer to EN 55022 and, for DC measurements, CISPR 16-1 with LISNs.
Immunity testing covers:
- the enclosure port, with radio-frequency field and ElectroStatic Discharge (ESD)
- DC and AC power ports, with radio-frequency common-mode disturbance and fast transients
- AC mains ports, with surges, voltage dips and power interruptions
- signal/control input/output and antenna ports, with radio-frequency common-mode disturbance and fast transients
- vehicle DC power input ports, with transient tests according to ISO 7637 for 12 V and 24 V equipment
The practical point is that the standard does not use one blanket test for all products. It ties the test method and severity to the port type, the power source, and whether the equipment is intended for base station, mobile, portable or vehicular use.
What terms does SIST ETS 300 680-1:1998 define?
- Ancillary equipment - equipment used with a receiver, transmitter or transceiver to add control or operating features, but which cannot provide the user function on its own.
- Enclosure port - the physical boundary of the apparatus, where electromagnetic fields can radiate to or from the equipment.
- Integral antenna equipment - CB equipment without an accessible external transmission-line interface; the standard treats this as low-power handheld CB equipment for portable use.
- Switching range - the maximum frequency range over which the equipment can operate without reprogramming or realignment.
- SINAD - Signal + Noise + Distortion to Noise + Distortion; the speech-performance measure used for class 1 speech equipment.
- BER - Bit Error Ratio; the data-performance measure used for non-speech applications.
- EUT - Equipment Under Test; the unit being measured in the EMC test.
Who uses SIST ETS 300 680-1:1998?
SIST ETS 300 680-1:1998 is used by manufacturers of CB radio equipment and ancillary equipment, EMC test laboratories, conformity assessors, and technical staff preparing documentation for EMC claims. It is also relevant to buyers and quality managers who need to know what evidence supports an EMC assessment.
In practice, users apply it when they:
- choose the correct test configuration for a CB radio product
- decide which port tests apply to a base station, mobile, portable or vehicular product
- check emissions and immunity during design verification
- prepare test reports and product descriptions for compliance files
- assess whether ancillary equipment can be tested alone or only with the radio equipment
Which standards are used with SIST ETS 300 680-1:1998?
SIST ETS 300 680-1:1998 is used together with ETS 300 135, which provides the technical characteristics and methods of measurement for angle-modulated CB radio equipment. The foreword also says the ETS is based on EN 50081-1 and EN 50082-1.
The normative references contribute the following:
- ETS 300 135 - product characteristics and measurement methods for angle-modulated CB radio equipment
- EN 50081-1 - generic emission standard for residential, commercial and light-industrial environments
- EN 50082-1 - generic immunity standard for residential, commercial and light-industrial environments
- EN 55022 - emission limits and measurement methods used for several emission tests
- CISPR 16-1 - measuring apparatus and methods for radio disturbance and immunity measurements
- ENV 50140 - radiated RF immunity test method used for enclosure-port testing
- EN 61000-4-2, -4, -5, -6, -11 - ESD, fast transients, surge, conducted RF immunity, and voltage dips/interruptions
- ISO 7637 Parts 1 and 2 - vehicle transient tests for 12 V and 24 V DC powered equipment
- 89/336/EEC and BC-T-353 - the directive context and harmonization mandate addressed by the ETS
What does the SIST ETS 300 680-1:1998 document contain?
SIST ETS 300 680-1:1998 contains the full EMC test framework for angle-modulated CB radio equipment. It brings together general test conditions, performance assessment rules, class-based acceptance criteria, applicability tables, emission limits, and immunity levels.
The document includes tables for:
- class 1 and class 2 performance criteria
- which ports are tested for each equipment type
- emission limits for conducted and radiated tests
- immunity levels for RF fields, ESD, fast transients, surges, voltage dips and vehicular transients
It also includes a figure showing examples of port types, and Annex A maps the EMC-related clauses to the essential requirements of the EMC Directive. In practice, that makes the document useful for design verification, formal EMC testing, certification work, and audit review of CB radio products and their ancillary equipment.
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Frequently Asked Questions
SIST ETS 300 680-1:1998 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Radio Equipment and Systems (RES); ElectroMagnetic Compatibility (EMC) standard for Citizens Band (CB) radio and ancillary equipment (speech and/or non-speech); Part 1: Angle-modulated". This standard covers: This ETS together with ETS 300 135 covers the asessment of Citizen s Band radio equipment in respect of EMC and may be used to demonstrate presumption of compliance with the protection requirements of the EMC Directive. ETS covers angle modulated (FM) equipment.
This ETS together with ETS 300 135 covers the asessment of Citizen s Band radio equipment in respect of EMC and may be used to demonstrate presumption of compliance with the protection requirements of the EMC Directive. ETS covers angle modulated (FM) equipment.
SIST ETS 300 680-1:1998 is classified under the following ICS (International Classification for Standards) categories: 33.060.20 - Receiving and transmitting equipment; 33.100.01 - Electromagnetic compatibility in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST ETS 300 680-1:1998 is associated with the following European legislation: Standardization Mandates: T-353. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST ETS 300 680-1:1998 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-1998
5DGLMVNDRSUHPDLQVLVWHPL 5(6 6WDQGDUGHOHNWURPDJQHWQH]GUXåOMLYRVWL (0&
UDGLMVNHLQSRPRåQHRSUHPH JRYRUQHR]LURPDQHJRYRUQH ]DUDGLRWHOHIRQLMR]D
REþDQH &% GHO 6NRWQRPRGXODFLMR
Radio Equipment and Systems (RES); ElectroMagnetic Compatibility (EMC) standard for
Citizens Band (CB) radio and ancillary equipment (speech and/or non-speech); Part 1:
Angle-modulated
Ta slovenski standard je istoveten z: ETS 300 680-1 Edition 1
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
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.
EUROPEAN ETS 300 680-1
TELECOMMUNICATION March 1997
STANDARD
Source: ETSI TC-RES Reference: DE/RES-09021-1
ICS: 33.020
Key words: EMC, test, radio communications equipment, CB radio
Radio Equipment and Systems (RES);
ElectroMagnetic Compatibility (EMC) standard for
Citizens' Band (CB) radio and ancillary equipment
(speech and/or non-speech);
Part 1: Angle-modulated
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 300 680-1: March 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 300 680-1: March 1997
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions, symbols and abbreviations.8
3.1 Definitions .8
3.2 Symbols .9
3.3 Abbreviations .9
4 General test conditions.9
4.1 Test conditions.9
4.1.1 Emission tests .10
4.1.2 Immunity tests .10
4.1.2.1 Mode of operation.10
4.1.2.2 Normal test modulation.10
4.1.2.3 Arrangements for test signals at the input of the
transmitter.11
4.1.2.4 Arrangements for test signals at the output of the
transmitter.11
4.1.2.5 Arrangements for test signals at the input of the receiver .11
4.1.2.6 Arrangements for test signals at the output of the receiver.11
4.1.2.7 Receiver and receivers of transceivers exclusion band .12
4.1.2.8 Transmitter exclusion band .12
4.1.2.9 Narrow band responses on receivers and receivers of
transceivers .12
5 Performance assessment .12
5.1 General .12
5.2 Ancillary equipment.13
5.3 Equipment EMC environment classification .13
6 Performance criteria.13
6.1 General performance criteria.14
6.2 Specific performance criteria for continuous phenomena applied to transmitters and
receivers .16
6.3 Specific performance criteria for transient phenomena applied to transmitters and
receivers including short voltage dips.16
6.4 Specific performance criteria for long voltage dips and power interruptions applied to
transmitters and receivers .16
7 Applicability overview tables.17
7.1 Emission .17
7.2 Immunity .17
8 Test methods and limits for emission tests.18
8.1 Enclosure port of ancillary equipment tested separately from other equipment.18
8.1.1 Definition .18
8.1.2 Method of measurement: .18
8.1.3 Limits.18
8.2 Emission: DC power input/output port .18
8.2.1 Definition .18
8.2.2 Method of measurement .18
8.2.3 Limits.18
8.3 Emission: AC mains power input/output port.19
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ETS 300 680-1: March 1997
8.3.1 Definition. 19
8.3.2 Method of measurement. 19
8.3.3 Limits . 19
9 Test methods and limits for immunity tests . 19
9.1 Test configuration. 19
9.2 Immunity: enclosure port. 20
9.2.1 Definition. 20
9.2.2 Method of measurement. 20
9.2.2.1 Radio frequency electromagnetic field. 20
9.2.2.2 ElectroStatic Discharge (ESD). 20
9.2.3 Immunity test levels . 20
9.3 Immunity: DC power input/output port. 20
9.3.1 Definition. 20
9.3.2 Method of measurement. 20
9.3.2.1 Radio frequency electromagnetic disturbance RF
common mode, 0,15 MHz – 80 MHz (current clamp
injection). 20
9.3.2.2 Fast transients common mode . 21
9.3.3 Immunity test levels . 21
9.4 Immunity: AC power input/output port. 21
9.4.1 Definition. 21
9.4.2 Method of measurement. 21
9.4.2.1 Radio frequency electromagnetic disturbance RF
common mode, 0,15 MHz - 80 MHz (current clamp
injection). 21
9.4.2.2 Fast transients common mode . 22
9.4.2.3 Surges common and differential mode. 22
9.4.2.4 Voltage dips and power interruptions. 22
9.4.3 Immunity test levels . 22
9.5 Immunity: signal/control input/output and antenna port. 22
9.5.1 Definition. 22
9.5.2 Method of measurement. 23
9.5.2.1 Radio frequency electromagnetic disturbance RF
common mode, 0,15 MHz – 80 MHz (current clamp
injection). 23
9.5.2.2 Fast transients common mode . 23
9.5.3 Immunity test levels . 23
9.6 Immunity: vehicle DC power input port. 23
9.6.1 Definition. 23
9.6.2 Method of measurement. 24
9.6.3 Immunity test levels: 12 V DC powered equipment. 24
9.6.4 Immunity test levels: 24 V DC powered equipment. 24
Annex A (normative): ETS 300 680-1: "EMC standard for Citizens' (CB) radio and ancillary
equipment (speech and/or non-speech); Part 1: Angle-modulated". 26
History. 27
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ETS 300 680-1: March 1997
Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI) in
response to European Commission mandate BC-T-353 [2].
This ETS together with ETS 300 135 [1] is intended to become a Harmonized EMC Standard, the
reference of which is intended to be published in the Official Journal of the European Commission
referencing the EMC Directive, 89/336/EEC [3].
The technical specifications, which are relevant to the EMC Directive are listed in normative annex A.
This ETS is based upon the Generic Standards EN 50081-1 [4], EN 50082-1 [5], and other standards
where appropriate, to meet the essential requirements of the Council Directive 89/336/EEC [3].
This ETS consists of 2 parts as follows:
Part 1: "Angle modulated";
Part 2: "Double Side Band (DSB) and/or Single Side Band (SSB)".
Transposition dates
Date of adoption: 7 March 1997
Date of latest announcement of this ETS (doa): 30 June 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1997
Date of withdrawal of any conflicting National Standard (dow): 31 December 1997
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ETS 300 680-1: March 1997
Blank page
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ETS 300 680-1: March 1997
1 Scope
This European Telecommunication Standard (ETS) covers the assessment of angle-modulated Citizens'
Band (CB) radio and ancillary equipment in respect of ElectroMagnetic Compatibility (EMC).
This ETS specifies the applicable EMC tests, the test methods, the limits and the minimum performance
criteria for angle-modulated CB Radio equipment (speech and/or non-speech) operating in the frequency
range 26-28 MHz, and the associated ancillary equipment.
The environmental classification used in this ETS refers to the environment classification used in the
Generic Standards EN 50081-1 [4], EN 50082-1 [5], except for the vehicular environment class which
refers to ISO 7637 [14], [15].
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 do not cover extreme
cases which may occur in any location but have a low probability of occurrence.
This ETS may not cover those cases where a potential source of interference which is producing
individually repeated transient phenomena or a continuous phenomena 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.
Compliance of radio equipment with the requirements of this ETS does not signify compliance with any
requirements related to the use of the equipment (i.e. licensing requirements).
Compliance to this ETS does not signify compliance to any safety requirements. However, it is the
responsibility of the assessor of the equipment that any observations regarding apparatus becoming
dangerous or unsafe as a result of the application of the tests of this ETS, is recorded in the test report.
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 relate to the publications 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] ETS 300 135: "Radio Equipment and Systems; Angle-modulated Citizens' band
radio equipment (CEPT PR 27 Radio Equipment); Technical characteristics and
methods of measurement".
[2] BC-T-353: "European Commission Standardization Mandate M/237".
[3] 89/336/EEC: "Council Directive of 3 May 1989 on the approximation of laws of
Member States relating to Electromagnetic Compatibility".
[4] EN 50081-1: "Electromagnetic compatibility - Generic emission standard. Part 1
Residential, commercial and light industry".
[5] EN 50082-1: "Electromagnetic compatibility - Generic immunity standard. Part 1:
Residential, commercial and light industry".
[6] EN 55022: "Limits and methods of measurement of radio disturbance
characteristics of information technology equipment".
[7] CISPR 16-1: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 1: Radio disturbance and immunity measuring
apparatus".
[8] ENV 50140: "Electromagnetic Compatibility - Basic immunity standard -
Radiated, radio-frequency electromagnetic field. Immunity test".
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ETS 300 680-1: March 1997
[9] EN 61000-4-2: "Electromagnetic Compatibility (EMC) - Part 4: Testing and
measurements techniques - Section 2: Electrostatic discharge immunity test".
[10] EN 61000-4-4: "Electromagnetic Compatibility (EMC) - Part 4: Testing and
measurements techniques - Section 4: Electrical fast transients/burst
requirements".
[11] EN 61000-4-6: "Electromagnetic Compatibility (EMC) - Part 4: Testing and
measurements techniques - Section 6: Immunity to conducted disturbances,
induced by radio-frequency fields".
[12] EN 61000-4-11: "Electromagnetic Compatibility (EMC) - Part 4: Testing and
measurements techniques - Section 11: Voltage dips, short interruptions and
voltage variations immunity tests".
[13] EN 61000-4-5: "Electromagnetic Compatibility (EMC) - Part 4: Testing and
measurements techniques - Section 5: Surge immunity test".
[14] ISO 7637 (1990): "Road vehicles - Electrical disturbance by conducting and
coupling - Part 1: Passenger cars and light commercial vehicles with nominal
12 V supply voltage".
[15] ISO 7637 (1990): "Road vehicles - Electrical disturbance by conducting and
coupling - Part 2: Commercial vehicles with nominal 24 V supply voltage -
Electrical transient conduction along supply lines only".
3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
ancillary equipment: Equipment (apparatus), used in connection with a receiver, transmitter or
transceiver is considered as an ancillary equipment (apparatus) if:
- the equipment is intended for use in conjunction with a receiver, transmitter or transceiver to
provide additional operational and/or control features to the radio equipment (e.g. to extend control
to another position or location); and
- the equipment cannot be used on a stand alone basis to provide user functions independently of a
receiver, transmitter or transceiver; and
- the receiver, transmitter or transceiver to which it is connected, is capable of providing some
intended operation such as transmitting and/or receiving without the ancillary equipment (i.e. it is
not a sub unit of the main equipment essential to the main equipment basic functions).
enclosure port: The physical boundary of the apparatus onto which an electromagnetic field may radiate
or impinge.
integral antenna equipment: CB equipment without an accessible external transmission line interface.
Integral antenna CB equipment in the context of this ETS should be understood to be low power handheld
CB radio equipment which is mainly used for children’s toys and similar purposes.
port: A particular interface of the specified equipment (apparatus) with the external electromagnetic
environment.
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ETS 300 680-1: March 1997
Enclosure port
Signal/control/
AC power port antenna port
APPARATUS
DC power port Earth port
Figure 1: Examples of a port
radiocommunications equipment: An item of radio equipment is an apparatus which includes one or
more transmitters and/or receivers and/or parts thereof. This type of equipment (apparatus) is used in a
fixed, mobile or a portable application.
switching range: The switching range is the maximum frequency range over which the equipment can be
operated without reprogramming or realignment.
3.2 Symbols
For the purposes of this ETS, the following symbols apply:
emf electromotive force
SINAD Signal + Noise + Distortion to Noise + Distortion
Tx Transmit
3.3 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
BER Bit Error Ratio
CB Citizens' Band
DSB Double Side Band
EMC Electromagnetic Compatibility
ESD ElectroStatic Discharge
EUT Equipment Under Test
LISN Line Impedance Stabilization Network
RF Radio Frequency
SSB Single Side Band
4 General test conditions
4.1 Test conditions
This subclause defines the requirements for the general test configuration and are as follows:
- the equipment shall be tested under conditions which are within the manufacturers declared range
of humidity, temperature and supply voltage;
- the test configuration shall be as close to normal intended use as possible;
- integral antenna CB equipment shall be tested in a manner typical of normal intended use;
- if the equipment is part of a system, or can be connected to ancillary equipment, then it shall be
acceptable to test the equipment while connected to the minimum configuration of ancillary
equipment necessary to exercise the ports;
- ports which in normal operation are connected shall be connected to an ancillary equipment or to a
representative piece of cable correctly terminated to simulate the impedance of the ancillary
equipment, Radio Frequency (RF) input/output ports shall be correctly terminated;
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ETS 300 680-1: March 1997
- if the equipment has a large number of ports, then a sufficient number shall be selected to simulate
actual operation conditions and to ensure that all the different types of termination are tested;
- ports which are not connected to cables during normal intended operation, e.g. service connectors,
programming connectors, temporary connectors etc. shall not be connected to any cables for the
purpose of EMC testing. Where cables have to be connected to these ports, or interconnecting
cables have to be extended in length in order to exercise the Equipment Under Test (EUT),
precautions shall be taken to ensure that the evaluation of the EUT is not affected by the addition or
extension of these cables;
- the tests shall be carried out at a point within the specified normal operating environmental range at
the rated supply voltage for the equipment;
- the test conditions, test configuration and mode of operation shall be recorded in the test report.
4.1.1 Emission tests
This subclause defines the requirements for the emissions test configuration and are as follows:
- the measurement shall be made in the operation mode producing the largest emission in the
frequency band being investigated consistent with normal applications;
- an attempt shall be made to maximize the detected radiated emission for example by moving the
cables of the equipment.
The CB radio equipment shall be operated on one channel frequency, which is close to the middle of the
switching range declared by the manufacturer.
4.1.2 Immunity tests
This subclause defines the requirements for the immunity test configuration and are as follows:
- the measurement shall be made in the mode of operation as required in subclause 4.1.2.1;
- for the immunity tests of ancillary equipment without a separate pass/fail criteria, the receiver,
transmitter or transceiver coupled to the ancillary equipment, shall be used to judge whether the
ancillary equipment passes or fails;
- immunity tests on CB radio equipment shall be carried out on one channel which is close to the
middle of the switching range declared by the manufacturer.
4.1.2.1 Mode of operation
For the immunity tests of transmitters, the transmitter shall be operated at its maximum RF output power,
or at a level not less than 6 dB below that power level in the event of declared thermal limitations. The
transmitter shall be modulated with normal test modulation (see subclauses 4.1.2.2 and 4.1.2.3). A
communication link shall be established (see subclause 4.1.2.4) at the start of the test.
For the immunity tests of receivers, the wanted input signal, coupled to the receiver, shall be modulated
with normal test modulation (see subclauses 4.1.2.2 and 4.1.2.5). A communication link shall be
established (see subclause 4.1.2.6) at the start of the test.
4.1.2.2 Normal test modulation
For analogue speech applications:
- the receiver wanted input signal shall be set to the nominal frequency of the receiver and modulated
with a sinusoidal audio frequency of 1 000 Hz. The wanted test signal shall have an FM deviation of
at least 1,2 kHz;
- the transmitter of the EUT shall be modulated with a sinusoidal audio frequency signal of 1 000 Hz.
The level of this audio signal shall be adjusted to obtain at least 1,2 kHz FM peak deviation.
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ETS 300 680-1: March 1997
For non speech applications:
- the receiver wanted input signal shall be set to the nominal frequency of the receiver and modulated
with a test signal specified by the manufacturer which represents normal operation;
- the transmitter shall be modulated with a test signal which represents normal operation as specified
by the manufacturer.
The test signal generator (modulation) shall be able to produce a continuous stream of data or a repetitive
message.
The test signal receiver (demodulator) shall be able to measure Bit Error Ratio (BER) of a continuous data
stream or a repetitive readout of message acceptance.
4.1.2.3 Arrangements for test signals at the input of the transmitter
The transmitter should be modulated with normal test modulation.
4.1.2.4 Arrangements for test signals at the output of the transmitter
For integral antenna CB equipment, the wanted signal, to establish a communication link, shall be
delivered from the equipment to an antenna located within the test environment. The measuring
equipment for the wanted signal shall be located outside of the test environment. Adequate measures
shall be taken to avoid the effect of the unwanted signal on the measuring equipment.
For equipment with an external coaxial antenna connector (non-integral antenna CB equipment), the
wanted signal to establish a communication link shall be delivered from the antenna connector by a
coaxial cable. The measuring equipment for the wanted signal shall be located outside of the test
environment. Adequate measures shall be taken to avoid any effect of the unwanted signal on the
measuring equipment.
4.1.2.5 Arrangements for test signals at the input of the receiver
For integral antenna CB equipment, the wanted input signal to establish a communication link, shall be
presented to the equipment from an antenna located within the test environment. The level of the signal
shall be approximately 40 dB above the minimum level necessary to achieve normal operation
performance, as declared by the manufacturer, measured while the power amplifiers generating the EMC
disturbance are switched on but without excitation. This level of the wanted input signal is expected to
represent normal operation signal level and is sufficient to avoid the broad band noise from the power
amplifiers from influencing the measurement. The source of the wanted input signal shall be located
outside of the test environment.
For equipment with an external coaxial antenna connector (non-integral antenna CB equipment), the
wanted input signal to establish a communication link shall be presented to the antenna connector by a
coaxial cable. The source of the wanted input signal shall be located outside of the test environment and
shall be at a nominal value of 40 dBμV emf.
4.1.2.6 Arrangements for test signals at the output of the receiver
For speech equipment the audio frequency output of the equipment should be coupled via a suitable
coupling device in order to demonstrate that the communication link is maintained. Precautions shall be
taken to ensure that any effect on the test is minimized.
For non-speech equipment the output of the receiver shall be coupled via a suitable coupling device in
order to demonstrate that the communication link is maintained. Precautions shall be taken to ensure that
any effect on the test is minimized.
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4.1.2.7 Receiver and receivers of transceivers exclusion band
The exclusion band for receivers and receivers of transceivers is the frequency range determined by the
switching range, as declared by the manufacturer, extended as follows:
- the lower frequency of the exclusion band is the lower frequency of the switching range, minus 5 %
of the centre frequency of the switching range;
- the upper frequency of the exclusion band is the upper frequency of the switching range, plus 5 %
of the centre frequency of the switching range.
4.1.2.8 Transmitter exclusion band
The exclusion band for transmitters extends ± 25 kHz from the nominal operating frequency of the
transmitter.
4.1.2.9 Narrow band responses on receivers and receivers of transceivers
Responses on receivers or receivers of transceivers occurring during the test at discrete frequencies
which are narrow band responses (spurious responses), are identified by the method specified in this
subclause.
If during the test an unwanted signal creates a degradation of the audio or data output, it is necessary to
establish whether the degradation is due to a narrow band response or to a wide band phenomenon.
Therefore, the unwanted signal frequency is increased by an amount equal to twice the bandwidth of the
receiver, as declared by the manufacturer. The test is repeated with the frequency of the unwanted signal
decreased by the same amount.
If the degradation disappears, then the response is considered as a narrow band response. If the
degradation remains, this may be due to the fact that the offset has made the frequency of the unwanted
signal correspond to the frequency of another narrow band response. Under these circumstances the
procedure is repeated with the increase and decrease of the frequency of the unwanted signal adjusted
two and one half times the bandwidth previously referred to.
If a degradation remains, the phenomena is considered as a wide band phenomena and therefore an
EMC problem. If the degradation is in excess of the maximum permissible degradation, the equipment
fails the test.
Narrow band responses shall be disregarded.
5 Performance assessment
5.1 General
Any instance of the EUT becoming unsafe or dangerous during the tests shall be recorded in the test
report.
If the performance criteria specified in the tables 1 and 2 (see subclause 6.1) are not appropriate, the
manufacturer shall declare a substituted specification for an acceptable performance level or performance
degradation as required by this ETS. The performance specification shall be included in the test report
and the product description and documentation. The performance criteria specified by the manufacturer
shall give the same degree of immunity protection as called for in subclauses 6.1, 6.2 and 6.3.
The manufacturer shall at the time of submission of the equipment for test, supply the following
information to be recorded in the test report:
- the primary user functions of the radio equipment (see clause 6) to be tested during and after the
EMC testing;
- the intended functions of the radio equipment which shall be in accordance with the documentation
accompanying the equipment;
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- the type of modulation, the characteristics of the transmission used for testing (random bit stream,
message format, etc.);
- the ancillary equipment to be combined with the radio equipment for testing (where applicable);
- an exhaustive list of ports, classified as either power or signal/control. Power ports shall further be
classified as AC or DC power;
- the bandwidth of the receiver;
- the applicable equipment class according to subclause 6.1;
- the AC/DC power converter to be used with the EUT (if any).
5.2 Ancillary equipment
At the manufacturers discretion an ancillary equipment may be:
- declared compliant separately (in isolation) from a receiver, transmitter or transceiver to
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