Acterna, the largest provider of test and management solutions to telecommunications network operators, announced it has designed and manufactured a reference transmitter according to ITU-T O.172 Appendix VII that exceeds the minimum accuracy requirements set by the International Telecommunications Union-Technology Standardization Sector (ITU-T). The Acterna reference transmitter generates a reference signal virtually free of pattern-dependent jitter and enables Acterna to provide standardized jitter receiver calibration and verification in the manufacturing process, resulting in increased receiver-to-receiver consistency and absolute accuracy. With this announcement, Acterna continues its commitment as a leading contributor to the development of ITU-T standards, specifically those concerning the world-wide standardization of jitter test equipment to ensure highest accuracy and consistency. Acterna and other test instrument vendors are working to develop consistency between their different instruments so that they do not report different jitter measurement results from the same device under test (DUT). This consistency can only be guaranteed by a well-defined, world-wide standard jitter source and an accepted standard jitter calibration method. To that end, Acterna is an active member of the ITU-T and has participated in the development of the ITU-T measurement recommendations since 1968. Acterna actively participates in several ITU-T Study Groups and is a key contributor in solving the problem of standardizing the performance of jitter measurement equipment (as part of ITU-T's Study Group 4).