A down converter, such as a low noise block (LNB) converter, of the outdoor unit of a terrestrial microwave or satellite receiving system includes apparatus for automatically controlling the conversion gain of the down converter. In one embodiment the automatic gain control apparatus, including a gain...http://www.google.de/patents/US6434374?utm_source=gb-gplus-sharePatent US6434374 - Apparatus for controlling the conversion gain of a down converter
