Procedure and apparatus for the regulation of the virtual length of the measuring field in electronic surveillance equipment (Machine-translation by Google Translate, not legally binding)

摘要

"Method and apparatus for regulating the virtual length of the measuring field in electronic monitoring devices" in which several units are fed from the same central supply device, characterized by the fact that in the feeding apparatus an adjustable control voltage is produced between two determined limits; this control voltage is brought to all the observation units connected to the feeding apparatus in question, including simultaneously in each of these units, the frequency characteristic of the amplifier circuit. (Machine-translation by Google Translate, not legally binding)