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PD CISPR/TR — Overview of Electromagnetic Compatibility Technical Report Standards (Television Receiver Immunity Picture Assessment and Radio Services Characteristics Database)
PD CISPR/TR Electromagnetic Compatibility Technical Report Series Overview (PD CISPR/TR 29 and PD CISPR/TR 31)
📡 PD CISPR/TR is the BSI Published Document (PD) series adopting CISPR (International Special Committee on Radio Interference) Technical Reports, overseen by the British Electrotechnical Committee and the EMC Technical Committee GEL/210. This batch covers two single-file technical reports: PD CISPR/TR 29:2004 specifies methods of objective picture assessment for the immunity characteristics of television broadcast receivers and associated equipment, and PD CISPR/TR 31:2012 establishes a database on the characteristics of radio services. Together they serve the two directions of product immunity evaluation and electromagnetic environment data management.
💡 CISPR/TR technical reports provide informative material rather than mandatory requirements. PD publications are adopted and published by BSI for reference by UK users; their content becomes a requirement only when referenced in contracts or regulations.
1. Series Overview 📌
CISPR is the special committee under IEC responsible for international standards on radio disturbance and immunity. CISPR Technical Reports (TR) provide supplementary technical material such as test method details, data compilations, and application guidance. When BSI decides to adopt a CISPR/TR, it publishes a PD CISPR/TR publication.
The two PD CISPR/TR publications in this batch belong to different areas of EMC: PD CISPR/TR 29 addresses picture quality evaluation in product immunity testing, overseen by GEL/210/11 (EMC product standards); PD CISPR/TR 31 addresses radio services characteristics data management, overseen by GEL/210/12 (EMC basic, generic, and low-frequency phenomena standardization). Together they illustrate the supporting role of EMC technical reports in “test methods” and “data foundations.”
⚠️ Both technical reports are readable-text versions. PD CISPR/TR 29 was published on 25 October 2004; PD CISPR/TR 31 is the second edition (September 2012) and supersedes the 2003 first edition. This article is based on the report text and table of contents; specific content should be confirmed against the official BSI published edition.
2. Standard List and Technical Overview 📋
| Standard No. | Title | Year | Technical Area |
|---|---|---|---|
| PD CISPR/TR 29:2004 | Television broadcast receivers and associated equipment — Immunity characteristics — Methods of objective picture assessment | 2004 | Product immunity/picture quality |
| PD CISPR/TR 31:2012 | Database on the characteristics of radio services | 2012 | Electromagnetic environment data management |
PD CISPR/TR 29 corresponds to CISPR/TR 29:2004 (first edition); PD CISPR/TR 31 corresponds to CISPR/TR 31:2012 (second edition, superseding the 2003 first edition). Both are BSI Published Documents (PD).
3. Key Technical Requirements 🔧
3.1 PD CISPR/TR 29:2004 — Objective picture assessment of TV receiver immunity
This technical report specifies methods of objective picture assessment for the immunity characteristics of television broadcast receivers and associated equipment. Key technical content includes:
- Scope: Applies to immunity evaluation of television broadcast receivers and associated equipment under electromagnetic interference, providing an objective method of picture quality assessment.
- Analogue picture degradation algorithms: Clause 5 specifies detection algorithms for analogue picture degradations, including algorithms for superimposed patterns/moiré patterns, loss of luminance and contrast, loss of colour, and loss of synchronisation.
- Digital picture degradation algorithms: Clause 6 specifies detection algorithms for digital picture degradations, including algorithms for blocking and frozen patterns/stop of moving elements.
- Test method: Clause 4 specifies the test method for objective picture assessment, giving the evaluation procedure and criteria.
3.2 PD CISPR/TR 31:2012 — Database on the characteristics of radio services
This technical report establishes a database on the characteristics of radio services. Key technical content includes:
- Database outline: Clause 4 specifies the framework of the database, describing its use to collect and provide characteristic data on radio services.
- Input to database: Clause 5 specifies the input requirements, including data fields and reporting forms.
- Usage of database: Clause 6 specifies how to query and use the service characteristic data.
- Reporting form: Annex A provides an informative reporting form for collecting characteristic parameters of radio services.
✅ Both technical reports share the theme of “supporting EMC evaluation with quantitative methods”: PD CISPR/TR 29 quantifies picture degradation objectively with algorithms to avoid inconsistency in subjective evaluation; PD CISPR/TR 31 systematically collects radio service characteristics in a database, providing a data foundation for EMC analysis and spectrum management.
4. Representative Standard Technical Interpretation 🔍
PD CISPR/TR 29:2004
Scope: Applies to the immunity characteristics of television broadcast receivers and associated equipment, providing an objective picture assessment method.
Key points: In immunity testing, evaluating the effect of electromagnetic interference on television pictures traditionally relies on subjective observation, which is significantly affected by the observer. This report proposes algorithm-based objective assessment: by detecting analogue picture degradation features such as superimposed patterns/moiré, loss of luminance and contrast, loss of colour, and loss of synchronisation, as well as digital degradation features such as blocking and frozen patterns, the picture quality can be quantitatively evaluated. This provides a more objective and repeatable means of acceptance assessment in immunity testing, particularly applicable to digital television and associated equipment.
PD CISPR/TR 31:2012
Scope: Establishes a database on the characteristics of radio services.
Key points: EMC analysis and spectrum management require knowledge of the transmission and reception characteristics of various radio services (e.g., broadcasting, mobile communications, radar). This report systematically collects these characteristic parameters through a database, specifying data fields, input processes, and reporting forms, allowing member organizations to share and update radio service characteristic data. The database covers service type, frequency band, transmission characteristics, reception characteristics, and other parameters, providing a unified data source for EMC assessment, interference analysis, and spectrum planning.
5. Engineering Practice and Application 🛠️
In consumer electronics immunity testing, PD CISPR/TR 29 is used for immunity evaluation of television receivers and associated equipment. Laboratories perform objective picture assessment per the algorithms in the report, reducing uncertainty from subjective observation and improving the repeatability and comparability of immunity test results.
In electromagnetic environment and spectrum management, PD CISPR/TR 31 is used for collecting and sharing radio services characteristic data. Spectrum regulators, equipment manufacturers, and EMC analysts use the service characteristic parameters from the database for interference analysis, compatibility assessment, and spectrum planning.
Both illustrate the informative supporting role of CISPR/TR technical reports in EMC standardization, providing technical support for the development and implementation of relevant product and basic standards.
⚠️ Technical reports are informative documents and do not constitute mandatory requirements. In practice, apply them together with the relevant CISPR product standards (e.g., CISPR 13, CISPR 35) and basic standards (e.g., the CISPR 16 series).
6. FAQ ❓
What is a PD publication?
A PD (Published Document) is a class of BSI publication used to adopt informative documents such as IEC, CISPR, or ISO technical reports and guides. PD publications provide informative material without mandatory force; their content becomes a requirement only when referenced in contracts or regulations.
A PD (Published Document) is a class of BSI publication used to adopt informative documents such as IEC, CISPR, or ISO technical reports and guides. PD publications provide informative material without mandatory force; their content becomes a requirement only when referenced in contracts or regulations.
Why is objective picture assessment used for television receiver immunity?
Traditional subjective observation is greatly affected by individual differences among observers, making results unstable. Objective picture assessment detects image degradation features (such as moiré, luminance loss, blocking, and frozen patterns) algorithmically for quantitative evaluation, improving repeatability and comparability of immunity test results.
Traditional subjective observation is greatly affected by individual differences among observers, making results unstable. Objective picture assessment detects image degradation features (such as moiré, luminance loss, blocking, and frozen patterns) algorithmically for quantitative evaluation, improving repeatability and comparability of immunity test results.
What is the use of the PD CISPR/TR 31 database?
The database collects transmission and reception characteristic parameters of radio services (e.g., broadcasting, mobile communications, radar) for EMC analysis, interference assessment, and spectrum planning, providing a unified data foundation for related analysis and standard development.
The database collects transmission and reception characteristic parameters of radio services (e.g., broadcasting, mobile communications, radar) for EMC analysis, interference assessment, and spectrum planning, providing a unified data foundation for related analysis and standard development.
Are technical reports mandatory?
No. Technical reports provide informative material and do not constitute mandatory requirements. Their content becomes a requirement only when referenced in contracts or regulations.
No. Technical reports provide informative material and do not constitute mandatory requirements. Their content becomes a requirement only when referenced in contracts or regulations.
How can the official text be obtained?
Obtain the official edition of the PD publication from BSI (BSI Standards Online / British Standards Online) and check its amendment and confirmation status.
Obtain the official edition of the PD publication from BSI (BSI Standards Online / British Standards Online) and check its amendment and confirmation status.