A system is described for the transfer of measuring data from an environment with a high interference level to outside by means of a glass fiber cable of 40 meter length. Such a cable is non-metallic, which offers a great advantage in this case over the usual metallic cable. The measuring data consist of electrical signals, which are converted to infra-red light. The overall-bandwidth is 100 MHz. The system can therefore handle analog impulsive signals with a rise time as low as 3,5.10-9 sec.
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