I.S. ETR 077:2002

Foreword
Introduction
1 Scope
2 References
3 Definitions, abbreviations and units
   3.1 Definitions
   3.2 Other definitions
   3.3 Abbreviations
   3.4 Units for power values
4 Existing recommendations and reports from the
   International Telecommunications Union (ITU) and its
   associated bodies
5 General considerations
   5.1 Effects of spurious radiation an receiving
       stations
   5.2 Sources of spurious radiation, physical units and
       measuring bandwidth
       5.2.1 Sources of spurious radiation
       5.2.2 Physical units
       5.2.3 Exclusion of the main beam direction from
             interference considerations
5.3 Considerations an measuring procedures
     5.3.1 EIRP value, Power Flux Density (PFD) or
           electric field strength
     5.3.2 Measurement at antenna ports
     5.3.3 Measuring bandwidth
     5.3.4 Operating conditions
6 Interference models
   6.1 Physical relationships and main parameters
       6.1.1 Relevant characteristics of interfered
             station
       6.1.2 Relevant characteristics of interfering
             station
       6.1.3 Propagation
   6.2 Statistical interferer model
   6.3 Single interferer model
7 Evaluation of spurious radiation limits for VSATs
   (based an the statistical interferer model)
   7.1 Adjustment of the derived limits for VSATs in ETSs
       and in CCIR Recommendation
       7.1.1 Receive-only VSAT in ETS 300 157 and in CCIR
             Recommendation
       7.1.2 Transmit/receive VSATs in ETS 300 159 and in
             CCIR Recommendation
   7.2 Spurious radiation assessment studies an
       transmit/receive VSATs for the carrier an case
8 Calculation examples for typical cases with a single
   interfering station for illustration purpose
   8.1 Examples of station parameters
       8.1.1 Receive only VSATs used for data
             distribution
       8.1.2 Transmit/receive VSATs used for data
             communication
       8.1.3 Radio relay systems for the transmission of
             digital signals
   8.2 Interference level at a receiver input caused by
       one interferer versus the distance
       8.2.1 Interference level at a VSAT receiver input
             versus distance
       8.2.2 Interference level at a radio relay station
             receiver input vs. distance
9 Conflict resolution
10 Conclusions and aspects for further considerations
Annex A (informative): Evaluation of spurious radiation
        limits for VSATs, based an a statistical
        interferer model
   A.1 Discussion
       A.1.1 Determination of the level of acceptable
             interference
       A.1.2 Evaluation of the noise floor of the
             interfered services
       A.1.3 Values given in CCIR Report 713-1
       A.1.4 Conclusion
   A.2 Evaluation of the total level of interferences
       A.2.1 Statistical determination of 10 10 log(sigma
             i(Gr(i)/di(m)[2])
       A.2.2 Probabilistic computation 10 log(E(sigma i
             (Gr(i)/di(m)[2]))
       A.2.3 Computation of the expected value of the
             antenna gain E(Gr)
       A.2.4 Computation of the expected value of the
             E(1/d[2])
       A.2.5 Sources density
       A.2.6 Combination of the parameters
       A.2.7 Maximum Spurious EIRP
   A.3 Recommendation for VSATs and TVROs outside the
       main beam
Annex B (informative): Protection of microwave radio
        links
   B.1 General
   B.2 Definitions and assumptions
   B.3 Antennas presently used for radio relay systems
   B.4 Critical positions of VSATs relative to a radio
       relay station
   B.5 Conclusion
History

Covers methods which have been used to derive limits for spurious radiation from TVRO and VSAT earth stations. Also provides some useful terms and summarises some general considerations which have been discussed in the process of deriving adequate limits.