The CCIR, considerig that Report 956, Appendix I to Part 1, provides conceptual definitions to proposed data signal parameters;( a)that Report 956, Appendix I to Part 1, provides conceptual definitions to proposed data signal parameters; (b)that Report 969 is intended to identify measurement methods and test procedures for checking the impairment of special signals resulting from transmission over television circuits; (c) that operational measurements on teletext signals need no special test signals, because they can be made on the normal teletext lines; (d)that automatic measurement of teletext signals suits the requirements of operational staff and makes the analysis of results easier; (e)that the definitions given in this Recommendation may be applicable to other data services.