selektor 1975-09

For regular interchange of programmes, broadcasting organizations use special programme circuits placed at their dis- posal by the telephone administrations either as permanent connections or, if they cross national borders, as tempor- arily established transmission paths. Until now, assessment of the quality of such circuits was performed manually and met with some difficulties, es- pecially in the case of international programme transmission (non-uniform test methods, different test instruments), as well as being unsatisfactory with egard to the time required for lining-up. ith automatic tester K 1060, Siemens are now offering an instrument for auto- matic quality supervision of mono and stereo programme circuits.