BS EN 60728-3:2011

INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Methods of measurement
5 Equipment requirements
Annex A (informative) - Derivation of non-linear
        distortion
Annex B (normative) - Test carriers, levels and
        intermodulation products
Annex C (normative) - Checks on test equipment
Annex D (informative) - Test frequency plan for
        composite triple beat (CTB), composite second
        order (CSO) and crossmodulation (XM)
        measurement
Annex E (informative) - Measurement errors which
        occur due to mismatched equipment
Annex F (informative) - Examples of signals, methods of
        measurement and network design for return paths
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Defines the measuring methods, performance requirements and data publication requirements for active wideband equipment of cable networks for television signals, sound signals and interactive services.

This part of IEC 60728 lays down the measuring methods, performance requirements and data publication requirements for active wideband equipment of cable networks for television signals, sound signals and interactive services.

This standard

• applies to all broadband amplifiers used in cable networks;

• covers the frequency range 5 MHz to 3 000 MHz;

NOTE The upper limit of 3 000 MHz is an example, but not a strict value. The frequency range, or ranges, over which the equipment is specified, should be published.

• applies to one-way and two-way equipment;

• lays down the basic methods of measurement of the operational characteristics of the active equipment in order to assess the performance of this equipment;

• identifies the performance specifications to be published by the manufacturers;

• states the minimum performance requirements of certain parameters.

Amplifiers are divided into the following two quality levels:

Practical experience has shown that these types meet most of the technical requirements necessary for supplying a minimum signal quality to the subscribers. This classification is not a requirement but is provided to users and manufacturers for information about minimum quality criteria of the material required to install networks of different sizes. The system operator has to select appropriate material to meet the minimum signal quality at the subscriber’s outlet, and to optimise cost/performance, taking into account the size of the network and local circumstances.

All requirements and published data are understood as guaranteed values within the specified frequency range and in well-matched conditions.