SIST ETS 300 433/A2 E1:2000

• Abstract:

  This together with ETS 300 680-2 is intended to become a harmonised standard, the reference of which is intended to be published in the Official Journal of the European Communities referencing the EMC Directive. This amendment implements the changes necessary to convert ETS 300 390 into a harmonised standard.

• Status: Published
• Publication Date: 30-Jun-2000
• ICS: 33.060.01 - Radiocommunications in general
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2000
• Due Date: 01-Jul-2000
• Completion Date: 01-Jul-2000
• Mandate: T-353
• Ref Project: ETSI ETS 300 433/A2 ed.1 (1997-03) - Radio Equipment and Systems (RES); Double Side Band (DSB) and/or Single Side Band (SSB) amplitude modulated Citizens Band (CB) radio equipment; Technical characteristics and methods of measurement

SIST ETS 300 433/A2 E1:2000 is the SIST edition of ETSI ETS 300 433 Amendment 2 for double side band (DSB) and/or single side band (SSB) amplitude modulated Citizens Band (CB) radio equipment. It specifies technical characteristics and methods of measurement for CB radio equipment, with a clear focus on receiver tests, channel frequencies, and EMC-related compliance points.

What does SIST ETS 300 433/A2 E1:2000 specify?

SIST ETS 300 433/A2 E1:2000 is an amendment to ETS 300 433 (1995) for CB radio equipment using DSB and/or SSB amplitude modulation. The document updates the technical and test provisions that matter for measuring equipment performance and for linking selected clauses to the EMC Directive.

The amendment is organized around a small number of targeted changes: the channel frequency table, two receiver measurement methods, and a normative annex for EMC compliance mapping.

Annex	What it covers
Annex C (normative)	Clauses and subclauses relevant for compliance with the essential requirements of EC Council Directives

What are the key requirements of SIST ETS 300 433/A2 E1:2000?

SIST ETS 300 433/A2 E1:2000 mainly affects how CB radio equipment is channelized and how certain receiver performance tests are run. In practice, it tells test labs what signals to apply, at what levels, and what response to record.

Channel frequencies and channel numbers

The amended Table 1 gives the carrier frequency plan and channel numbers for the CB band. This is the basic reference for setting up equipment and verifying that a radio uses the intended channel spacing and numbering.

For engineers and buyers, this means the radio should be checked against the listed channel plan rather than treated as a generic 27 MHz device.

Inter-modulation response rejection

Subclause 9.3.2 replaces the method of measurement for inter-modulation response rejection. SIST ETS 300 433/A2 E1:2000 requires three input signals through a combining network: one wanted signal at the nominal receiver frequency, and two unwanted signals placed above or below that frequency by the stated offsets.

The wanted signal is set at the level tied to maximum useable sensitivity, and the unwanted signals are adjusted until the psophometrically weighted SND/ND ratio at the receiver output drops to 14 dB. In practice, this checks how well the receiver handles strong nearby signals without producing excessive interference or distortion.

Spurious response rejection

Subclause 9.5.2 replaces the method of measurement for spurious response rejection. SIST ETS 300 433/A2 E1:2000 uses a wanted signal at the nominal frequency and a sweeping unwanted signal, applied through a combining network, over a wide frequency range from 100 kHz to 1 GHz.

At each spurious response, the unwanted level is adjusted until the SND/ND ratio again falls to 14 dB, and the ratio is recorded. This matters because it shows whether the receiver can falsely respond to signals outside the intended channel.

EMC-related clauses

Annex C identifies the clauses and subclauses relevant to the essential requirements of Council Directive 89/336/EEC. It points to transmitter spurious emissions, spurious radiations, and spurious response rejection.

For compliance work, this is the part that helps map technical testing to EMC conformity evidence.

What terms does SIST ETS 300 433/A2 E1:2000 define?

• Double Side Band (DSB) - An amplitude-modulated signal format used for CB radio equipment and for the test signals in this document.
• Single Side Band (SSB) - A reduced-bandwidth amplitude-modulated signal format used for CB radio equipment and referenced in the receiver tests.
• emf - Electromotive force, used here as the signal level stated at the receiver input.
• Combining network - The network used to feed wanted and unwanted test signals into the receiver at the same time.
• SND/ND - The psophometrically weighted signal-to-noise and distortion/noise ratio used as the response criterion in the receiver tests.
• Spurious response rejection - The receiver's ability to avoid false responses to signals outside the wanted channel.

Who uses SIST ETS 300 433/A2 E1:2000?

SIST ETS 300 433/A2 E1:2000 is used by CB radio manufacturers, test laboratories, EMC compliance teams, and certification or approval staff. It is also useful for quality managers and buyers who need to check that a DSB/SSB CB radio is built and tested against the right channel plan and receiver performance methods.

What changed in SIST ETS 300 433/A2 E1:2000 from the previous edition?

SIST ETS 300 433/A2 E1:2000 is Amendment 2 to the First Edition. The amendment updates the channel frequency table, replaces the measurement methods in subclause 9.3.2 and subclause 9.5.2, and inserts Annex C for EMC Directive mapping.

Which standards are used with SIST ETS 300 433/A2 E1:2000?

• ETS 300 433 (1995) - The base ETS that this amendment modifies.
• ETS 300 680-2 - The companion part named with this ETS in the foreword as part of the intended harmonized-standard set.

What does the SIST ETS 300 433/A2 E1:2000 document contain?

The document contains the amended channel table, revised receiver test methods, and the normative Annex C that links selected clauses to Council Directive 89/336/EEC. It also includes the foreword, amendment instructions, and document history.

For test work, the most practical content is the signal setup for inter-modulation and spurious response rejection, including the use of a combining network, the wanted and unwanted test signals, and the required SND/ND criterion.

SLOVENSKI STANDARD
01-julij-2000
5DGLMVNDRSUHPDLQVLVWHPL5(65DGLMVNDRSUHPD]D&%&LWL]HQV%DQG]
DPSOLWXGQRPRGXODFLMRLQGYRERþQLPR]LURPDHQRERþQLPSUHQRVRP7HKQLþQH
NDUDNWHULVWLNHLQPHULOQHPHWRGH
Radio Equipment and Systems (RES); Double Side Band (DSB) and/or Single Side Band
(SSB) amplitude modulated Citizens Band (CB) radio equipment; Technical
characteristics and methods of measurement
Ta slovenski standard je istoveten z: ETS 300 433/A2 Edition 1
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

ETS 300 433
AMENDMENT A2
March 1997
Source: ETSI TC-RES Reference: RE/RES-00010
ICS: 33.020
Key words: CB, measurement, radio
This amendment A2 modifies
the European Telecommunication Standard ETS 300 433 (1995)
Radio Equipment and Systems (RES);
Double Side Band (DSB) and/or Single Side Band (SSB)
amplitude modulated Citizens' Band (CB) radio equipment;
Technical characteristics and methods of measurement
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
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Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
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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 1997. All rights reserved.

Page 2
ETS 300 433: November 1995/A2: 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.

Page 3
ETS 300 433: November 1995/A2: March 1997
Foreword
This amendment to ETS 300 433 (1995) has been produced by the Radio Equipment and Systems (RES)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
ETS 300 433, as amended by this amendment, together with ETS 300 680-2 is intended to become a
Harmonized Standard, the reference of which is intended to be published in the Official Journal of the
European Communities, referencing Council Directive 89/336/EEC (EMC Directive).
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

Page 4
ETS 300 433: November 1995/A2: March 1997
Amendments
Page 7, Foreword
This European Telecommunications Standard (ETS) has been prepared by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI).
This ETS, together with ETS 300 680-2 is intended to become a Harmonized Standard, the reference of
which is intended to be published in the Official Journal of the European Communities, referencing
Council Directive 89/336/EEC (EMC Directive).
Insert the following after the last paragraph:
The technical specifications relevant to the EMC Directive are listed in annex C.
Replace table 1 on page 12 with the following table 1:
Table 1: Carrier frequency and channel number
Carrier frequencies Channel Carrier frequencies Channel Carrier frequencies Channel
(MHz) number (MHz) number (MHz) number
26,965 1 27,135 15 27,295 29
26,975 2 27,155 16 27,305 30
26,985 3 27,165 17 27,315 31
27,005 4 27,175 18 27,325 32
27,015 5 27,185 19 27,335 33
27,025 6 27,205 20 27,345 34
27,035 7 27,215 21 27,355 35
...