IEC 60728-4:2007

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
  3.1 Terms and definitions
  3.2 Symbols
  3.3 Abbreviations
4 Methods of measurement
  4.1 Attenuation
      4.1.1 Test equipment
      4.1.2 Measurement procedure
      4.1.3 Presentation of the results
  4.2 Isolation
      4.2.1 Definition
      4.2.2 Test equipment
      4.2.3 Measurement procedure
      4.2.4 Presentation of the results
  4.3 Through-loss
      4.3.1 Definition
      4.3.2 Test equipment
      4.3.3 Measurement procedure
      4.3.4 Presentation of the results
  4.4 Group delay variation
      4.4.1 Definition
      4.4.2 Test equipment
      4.4.3 Method of measurement
      4.4.4 Presentation of the result
  4.5 Amplitude frequency response
  4.6 Return loss
  4.7 Hum modulation of carrier
      4.7.1 Definition
      4.7.2 Description of the method of measurement
      4.7.3 Measuring procedure
      4.7.4 Calculating the hum-modulation ratio
      4.7.5 Presentation of the results
  4.8 Two-carrier intermodulation measurements for second-
      and third-order products
5 Performance requirements and recommendations
  5.1 General performance requirements and recommendations
      5.1.1 Safety
      5.1.2 Electromagnetic compatibility (EMC)
      5.1.3 Environmental
      5.1.4 Marking
      5.1.5 Impedance
      5.1.6 Degradation of performance caused by overvoltages
  5.2 Performance requirements and recommendations for
      receiver lead
  5.3 Performance requirements and recommendations for
      system outlets
      5.3.1 Safety
      5.3.2 Quality grading
      5.3.3 Mechanical requirements
      5.3.4 Electrical parameters and requirements
  5.4 Performance requirements and recommendations for
      splitters and taps
      5.4.1 Description
      5.4.2 Mechanical requirements for connectors
      5.4.3 Electrical parameters and requirements.
  5.5 Performance requirements and recommendations for all
      other passive equipment
      5.5.1 Description
      5.5.2 Mechanical requirements for connectors
      5.5.3 Electrical parameters and requirements
Bibliography
Annex A (informative) Measurement errors which occur due to
                      mismatched equipment
Annex B (informative) Differences in some countries

IEC 60728-4:2007 applies to system outlets, splitters and taps, passive single or multiple port equipment comprising filters, attenuators, equalizers, galvanic isolators, power injectors, cable splices, terminating resistors and transfer points, but excluding coaxial cables and receiver leads. This standard:
- covers the frequency range 5 MHz to 3 000 MHz;
- identifies performance requirements for certain parameters;
- lays down data publication requirements for certain parameters;
- stipulates methods of measurements;
- introduces minimum requirements defining quality grades. This third edition cancels and replaces the second edition published in 2000, of which it constitutes a technical revision. It includes the following significant technical changes: Subclause 3.1 includes several new or modified definitions. Clause 4 includes added test methods for attenuation, isolation, through-loss, group delay variation, amplitude frequency response and two carrier intermodulation measurements for second- and third-order products. Clause 5 includes updated and new performance requirements.