Patent ID: 6259081
Filing Date: 2001-07-10
Classification: H04B

Abstract:
A device for receiving a transmission signal and for transmitting an optical beam, the device comprising:a transmitter for transmitting an optical beam having an adjustable intensity, said transmitter having a controller for setting the intensity;a receiver for receiving a transmission signal effected by the optical beam, said receiver having an analyzer for outputting a threshold signal if the transmission signal has a strength exceeding a predetermined limit value;a pick-up for outputting a start signal for starting the transmission signal; anda control unit connected to said analyzer, to said pick-up and to said controller, said control unit driving said controller, after reception of the start signal from said pick-up, for causing said controller to set the intensity to a value increasing continuously from substantially zero until said analyzer outputs the threshold signal, and said control unit then leaving said controller unchanged until reception of a new start signal.