The velocity deception apparatus utilizes a serrodyne technique to produce various deception jamming modes. The modes are all controllable by parameters which are digitally stored and in addition, the modes may be selectively actuated by a remote control panel located in the aircraft on which the apparatus...http://www.google.fr/patents/US5003312?utm_source=gb-gplus-shareBrevet US5003312 - Velocity deception apparatus and method therefor
