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Testing circuit for plug-in cable connection between radio and audio amplifier uses evaluation of DC voltage received at radio end of cable connection from virtual earth point at amplifier end
Testing circuit for plug-in cable connection between radio and audio amplifier uses evaluation of DC voltage received at radio end of cable connection from virtual earth point at amplifier end
The testing circuit has a DC voltage generator (8) at the input of the audio amplifier, for providing a virtual earth point, with an evaluation circuit (13) at the radio end of the plug-in cable connection receiving the DC voltage for evaluation via a signal feedback line (12).
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