Copyright 2006 by Lockheed Martin Corporation. CURRENCY NOTICE: A hard copy of this document may not be the document currently in effect. The current version is always the version in the Lockheed Martin Network. Use or disclosure of the information contained herein is subject to the restrictions on the Cover Page Lockheed Martin Aeronautics Company Quotable Quotes! John Osburn

2 Understanding EMI The more an engineer learns about EMI the more he understands how little he knows about EMI.

3 Training Tell a man there are 300 billion stars, hell believe you. Tell him a bench has wet paint, and hell touch it to be sure.

4 On Building vs. Programming If builders built buildings the way programmers wrote code, the first woodpecker to come along would destroy civilization.

5 On the Perfection of Science The only perfect science is hind-sight.

6 On Logic Logic is a systematic method of coming to the wrong conclusion with high confidence.

7 Rule for Cable Shielding The amount of shielding that is required for cabling connected to a circuit is directly proportional to the amount of money and weight saved by the company designing the circuit by not incorporating filtering or good engineering circuit layout practices and inversely proportional to the money and weight that the company providing the cabling is trying to save by avoiding shielding.

8 Establishing Consensus on EMI: a Restatement of Osburns Rule of Grounding For every formula that proves a point that an engineer is trying to make, there are N - 1 formulas that disprove that point, where N is the number of engineers in the room or on the phone at the time. Proof: Two engineers will agree, and outvote everyone else 2:1.

9 On the Concept of Transfer Impedance Transfer impedance is an undefined concept that has no basis in reality. It is a term used by more experienced engineers in a manner similar to having Boy Scouts go on a snipe hunt to keep a less experienced engineer out of their way.

10 Knowledge Base on EMI The only thing for sure that you can say about EMI is that there is nothing for sure you can say about EMI.