SIST EN 300 433-2:2001

SIST EN 300 433-2:2001 is a harmonized European standard from ETSI, adopted by SIST, for Double Side Band (DSB) and/or Single Side Band (SSB) amplitude modulated Citizens' Band (CB) radio equipment. It specifies the essential requirements under article 3.2 of the R&TTE Directive for CB radio equipment operating in the 27 MHz band, and it is written for manufacturers, test laboratories, and conformity assessors.

What does SIST EN 300 433-2:2001 specify?

SIST EN 300 433-2:2001 specifies the radio spectrum requirements that CB radio equipment must meet to use the allocated spectrum without causing harmful interference. The standard applies to voice and data equipment, including analogue and combined analogue/digital equipment with an internal or external antenna connector.

The scope covers base stations, mobile stations, and hand portable stations, including portable equipment with an antenna socket and integral-antenna equipment. It applies to equipment using the available bandwidth in the 27 MHz CB band with 10 kHz channel separation.

The document is organized into these main parts:

Annex A provides the EN-RT proforma, which is a tabular summary of the requirements and their status for conformity assessment.

What are the key requirements of SIST EN 300 433-2:2001?

SIST EN 300 433-2:2001 sets out a series of transmitter and receiver requirements, each with a defined limit and a corresponding conformance test. In practice, this is the part of the standard that tells a supplier what must be measured and what must be shown during type testing.

Transmitter accuracy and unwanted emissions

Clause 4.2.1 covers frequency error, and clauses 4.2.2 to 4.2.6 cover carrier power (conducted), effective radiated power, adjacent channel power, transmitter spurious emissions, and transient frequency behaviour of the transmitter. These items matter because they control whether the transmitter stays on channel, radiates at the intended strength, and avoids interfering with nearby or unrelated communications.

Clause 5.2 assigns the matching tests for these transmitter requirements, using the test methods defined in EN 300 433-1. For a manufacturer, this means the transmitter must be checked against the specified limits, not only designed for nominal operation.

Receiver performance

Clause 4.2.7 covers sensitivity, clause 4.2.8 adjacent channel selectivity, clause 4.2.9 spurious response rejection, clause 4.2.10 intermodulation response rejection, and clause 4.2.11 receiver spurious radiations. These requirements matter because they show how well the receiver can hear wanted signals while rejecting nearby signals, false responses, and unwanted radiation from the receiver itself.

Clause 5.3 gives the corresponding tests. In practical terms, a buyer or lab uses these clauses to confirm that the radio can work reliably in a busy RF environment.

Environmental profile and compliance approach

Clause 4.1 states that the technical requirements apply under the declared environmental profile for the equipment. This matters because compliance is tied to the operating conditions stated by the supplier, so the declared environment becomes part of the conformity case.

Clause 5.1 ties the tests to the conditions, power supply, and ambient temperatures defined in EN 300 433-1. This means the compliance assessment is not just a bench check of one parameter, but a controlled test against the referenced measurement conditions.

Static conformity summary

Annex A contains the EN Requirements Table (EN-RT). It identifies each requirement as mandatory and is used to group and record the requirements for a particular equipment assessment. For compliance work, this gives a concise checklist for the technical file or test report.

What terms does SIST EN 300 433-2:2001 define?

• Double Side Band (DSB) - An amplitude-modulated transmission mode with sidebands on both sides of the carrier, used here for CB equipment.
• Single Side Band (SSB) - An amplitude-modulated transmission mode using one sideband, also covered by this standard.
• Citizens' Band (CB) - The CB radio service in the 27 MHz band to which the standard applies.
• Radio and Telecommunications Terminal Equipment (R&TTE) Directive - The directive whose article 3.2 spectrum requirement is addressed by this standard.
• Electromagnetic compatibility (EMC) - A term used in the document’s references and abbreviations, referring to the ability of equipment to operate without causing or suffering unacceptable interference.
• EN Requirements Table (EN-RT) - The annex table that lists the requirements and their status for conformity assessment.

Who uses SIST EN 300 433-2:2001?

SIST EN 300 433-2:2001 is used by radio equipment manufacturers, test laboratories, and certification or conformity-assessment personnel. It is also useful to quality managers, product engineers, and buyers who need to check whether a CB radio product is designed and tested for the 27 MHz band under the R&TTE essential requirements.

In practice, these users apply the standard when designing transmitters and receivers, planning type tests, compiling technical documentation, and checking whether a product can be assessed against article 3.2 requirements.

Which standards are used with SIST EN 300 433-2:2001?

• ETSI EN 300 433-1 - Provides the technical characteristics, definitions, symbols, measurement methods, limits, and test procedures that this part references throughout clauses 4 and 5.
• Directive 1999/5/EC (R&TTE Directive) - Provides the legal framework for the essential requirements under article 3.2.
• Council Directive 98/34/EC - Provides the procedure for information in the field of technical standards and regulations.
• Council Directive 89/336/EEC (EMC Directive) - Gives the electromagnetic compatibility context referenced in the foreword and scope.
• Council Directive 73/23/EEC (LV Directive) - Gives the low-voltage safety context referenced in the foreword.

What does the SIST EN 300 433-2:2001 document contain?

SIST EN 300 433-2:2001 contains the scope, normative references, definitions and abbreviations, followed by detailed technical requirement specifications for transmitter and receiver performance. It also contains the test conditions and the matching compliance tests, each tied back to EN 300 433-1.

The document includes Annex A with the EN-RT proforma, which is intended for structured conformity assessment and can be reproduced for that purpose. The foreword also presents the modular structure used for R&TTE standards and explains where this part fits within that framework.