An Update of the Laser Transceiver for the ARRL 10GHz and Up Contest

摘要

This paper describes an update to the laser transceiver presented and demonstrated in Microwave Update 1999. The audio amplifier has been greatly simplified. The previous amplifier incorporated automatic gain control in order to prevent saturation, which was found to be unnecessary. Also, the detector bias dc-dc converter has been eliminated, and the detector is biased from the negative battery supply. The result is a simplified transceiver with actually improved performance because of noise reduction from the above changes. The transceiver is becoming popular as an entry into laser experimentation. The beginner can build this transceiver and then use the electronics with a larger telescope for DX and perhaps graduate to a higher power laser diode for even greater range. A printed wiring board is now available to allow experimenters to duplicate the transceiver.