Description of modems, terminal equip ment, transmission equipment and data transmission systems

Programmes of measurements Descrip tion and scope of the measuring installation

Description of the different parts of the measuring installation and its operation Results of the first measurements

Interference in adjacent audiofrequency and carrierfrequency telephone circuits due to the methods of trans mitting lowfrequency selection pulses and measures to be adopted for reducing them

Influence of the Western Electric dispatching system and of motive power units with ´thyristor´ firingangle control on telephone circuits intended for data transmission

Final recommendations concerning the characteristics of railway circuits forming part a transmission system and description of the basic conditions for the construction of such a system Final Report

Report of enquiry

Tests made by the DB at high speeds and with several pantographs

Theoretical studies and tentative tests conducted by BR (dynamic behaviour)

Comparison and analysis of test results Recommendations concerning the design of pantographs and overhead equipment Final Report