NBN EN 50083-10 : 2002

1 Scope
      1.1 General
      1.2 Specific scope of this Part 10
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 Setup of the network
      4.2 Measurement of signal level
      4.3 Measurement of amplitude response
      4.4 Measurement of signal to noise ratio (S/N)
      4.5 Measurement of multiple interference
      4.6 Measurement of impulse noise
      4.7 Measurement of echo ratio
      4.8 Measurement of group delay variation
      4.9 Measurement of frequency error
      4.10 Measurement of Bit Error Rate (BER)
5 System performance requirements
      5.1 Introduction
      5.2 Analogue parameters influencing system
             performance
      5.3 General requirements
      5.4 Specific system performance requirements
6 System performance recommendations
      6.1 Proposal for the use of the return path bandwidth
Annex A (informative) System performance requirements for
                      different modulation techniques
Annex B (normative) Correction factors for noise
Annex C (informative) Bibliography

Covers the transparent return path of cable networks in the frequency range 5 MHz to 65 MHz, or parts thereof. Fibre based networks may use higher frequencies. Active return paths usually only carry return signals, but a passive return path may be used for return and forward signals. Basic procedures are laid down for measuring signals used in return paths so as to assess performance of those signals and their performance limits. Requirements refer to performance limits obtained between the reference points of the return path system. The network termination close to the subscriber is one reference point. If no termination point exists, the system outlet is the reference point