SIST ETS 300 433/A1 E1:2000

• Abstract:

  To correct erroneous channel numbering and to insert correct frequency (400 Hz) in immunity tests in place (in place of 1 000 Hz).

• 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
• Ref Project: ETSI ETS 300 433/A1 ed.1 (1996-12) - 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/A1 E1:2000 is the Slovenian adoption of ETS 300 433 Amendment 1 from ETSI. It applies to Double Side Band (DSB) and/or Single Side Band (SSB) amplitude modulated Citizens Band (CB) radio equipment and updates the technical characteristics and measurement methods used to check receiver performance. In practice, it corrects the CB channel numbering table and changes certain immunity tests to use 400 Hz modulation.

What does SIST ETS 300 433/A1 E1:2000 specify?

SIST ETS 300 433/A1 E1:2000 specifies amendments to ETS 300 433 (1995) for CB radio equipment. It changes the channel numbering in Table 1 and revises two receiver immunity measurement methods, so test results and channel references match the corrected values.

The amendment is organized around three edits:

• Table 1: corrected carrier frequency and channel number mapping.
• Subclause 9.3.2: replacement text for inter-modulation response rejection.
• Subclause 9.5.2: replacement text for spurious response rejection.

For a reader, that means this document is not a full standalone technical standard. It is the change set that test laboratories, manufacturers, and reviewers apply to the base standard.

What are the key requirements of SIST ETS 300 433/A1 E1:2000?

The main technical changes are in the receiver test methods and the channel table. The amendment makes the test setup more specific about signal frequencies, levels, and modulation, which matters because these details directly affect measured immunity results.

• Correct CB channel numbering in Table 1. The amendment replaces the channel-frequency table used for CB carrier assignment. In practice, engineers and test labs must use the revised channel numbers when identifying channels or setting test frequencies.

• Use the combining network in the receiver immunity measurements in subclauses 7.1, 9.3.2, and 9.5.2. This lets multiple signals be applied to the receiver input in a controlled way, which is necessary for repeatable immunity testing.

• Measure inter-modulation response rejection as described in 9.3.2. The wanted test signal is applied at the nominal receiver frequency with normal test modulation, at the sensitivity-related level given in the text. Two unwanted signals are then added, one 20 kHz above and one 40 kHz above the nominal frequency, and the second unwanted signal uses DSB modulation at 400 Hz with 60 % modulation depth. This checks how well the receiver resists distortion from strong nearby signals.

• Repeat the inter-modulation test below the nominal frequency. The amendment requires the same measurement sequence with the unwanted signals placed below the nominal frequency by the stated offsets. This matters because receiver behavior can differ on either side of the channel.

• Measure spurious response rejection as described in 9.5.2. The wanted signal is again applied at the nominal frequency, while the unwanted signal is DSB modulated at 400 Hz with 60 % modulation depth and swept from 100 kHz to 1 GHz. This checks whether the receiver reacts to false responses outside the wanted channel.

• Use the 14 dB SND/ND criterion. In both methods, the input level is adjusted until the psophometrically weighted SND/ND ratio at the receiver output is reduced to 14 dB, and the resulting input ratio is recorded in dB. In practice, this gives a clear pass/fail reference point for test reports.

• Use 400 Hz where earlier text used 1 000 Hz. The amendment’s scope states this explicitly for the immunity tests. That is important for anyone updating test equipment or comparing old and new reports.

What terms does SIST ETS 300 433/A1 E1:2000 define?

SIST ETS 300 433/A1 E1:2000 uses several technical terms that are central to the test methods.

• Citizens Band (CB) - the radio service and channel plan covered by the equipment.
• Double Side Band (DSB) - an amplitude modulation mode used in the wanted and unwanted test signals.
• Single Side Band (SSB) - the other amplitude modulation mode covered by the receiver test methods.
• Combining network - the test network used to feed multiple signals into one receiver input.
• Inter-modulation response rejection - the ratio that shows how well a receiver resists mixing products from multiple signals.
• Spurious response rejection - the ratio that shows how well a receiver resists false responses when an unwanted signal is swept across a wide frequency range.

Who uses SIST ETS 300 433/A1 E1:2000?

SIST ETS 300 433/A1 E1:2000 is used by CB radio equipment manufacturers, receiver designers, test laboratories, and conformity assessment teams. Quality managers and buyers can also use it to check that test reports and product claims are based on the same channel plan and measurement conditions. The document is especially relevant when verifying receiver immunity and comparing measurements from different labs.

What changed in SIST ETS 300 433/A1 E1:2000 from the previous edition?

SIST ETS 300 433/A1 E1:2000 is Amendment 1 to ETS 300 433 (1995). The stated changes are:

• corrected channel numbering in Table 1;
• replacement of 1 000 Hz with 400 Hz in the immunity tests;
• replacement text for subclause 9.3.2 on inter-modulation response rejection;
• replacement text for subclause 9.5.2 on spurious response rejection.

Which standards are used with SIST ETS 300 433/A1 E1:2000?

SIST ETS 300 433/A1 E1:2000 is used with ETS 300 433 (1995), the base standard it amends. ETS 300 433 provides the original technical characteristics and measurement methods for DSB and/or SSB amplitude modulated CB radio equipment, and this amendment updates specific parts of that text.

What does the SIST ETS 300 433/A1 E1:2000 document contain?

The document contains the amended channel table and the replacement measurement text for two receiver immunity clauses. It also includes the foreword, transposition dates, copyright notice, and document history.

For testing work, the useful content is the detailed setup for inter-modulation response rejection and spurious response rejection. That includes the use of a combining network, the nominal receiver frequency, signal offsets, modulation depth, signal levels, sweep range, and the 14 dB SND/ND criterion. In practice, the document gives laboratories the exact procedure they need to reproduce the amended measurements consistently.

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/A1 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 A1
December 1996
Source: ETSI TC-RES Reference: RE/RES-00009
ICS: 33.020
Key words: CB, measurement, radio
This amendment A1, will modify
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
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: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1996. All rights reserved.

Page 2
ETS 300 433: November 1995/A1: December 1996
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/A1: December 1996
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).
Transposition dates
Date of adoption of this amendment: 6 December 1996
Date of latest announcement of this amendment (doa): 31 March 1997
Date of latest publication or endorsement of this amendment 30 September 1997
(dop/e):
Date of withdrawal of any conflicting National Standard (dow): 30 September 1997

Page 4
ETS 300 433: November 1995/A1: December 1996
Amendments
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
27,055 8 27,225 22 27,365 36
27,065 9 27,235 24 27,375 37
27,075 10 27,245 25 27,385 38
27,085 11 27,255 23 27,395 39
27,105 1
...