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Moss Bay EDA offers the IBM EMC rule checking software, EMSAT, which is a geometry-based EMC rule checking program that reads any popular layout file and allows selection of which EMC rules to test the board against. The program provides tagging capabilities for the various nets/traces that are critical for EMC, indicating which are I/O nets, power nets, ground, etc. Any violation to the EMC rules may be viewed either directly in the layout file or as an HTML document.


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EMSAT is a state-of-the-art EMC rule checking program that is optimized to provide fast and accurate reporting of any EMC violations on a printed circuit board design. Users may tailor the various parameters for each rule for their particular design goals. Each EMSAT rule may be used or ignored, as the user wishes, so that the most important EMC rules are applied to their designs.

Why Use an EMC Rule Checker?

The world of EMI/EMC compliance has become much more important than ever before, due to the higher speed electronics in lower cost packages. The ‘old ways’ of best-guess design practices, and then fix the EMI problems after the product is built is not acceptable in today’s market place. Designs must be cost effective, and must pass regulatory requirements the first time through the design cycle.

The EMC performance of a printed circuit board is mostly based on the location of the various components and the location of the various critical and I/O nets. Manual checking of all the various layers of today’s high speed circuit boards is too time consuming and prone to human error. EMSAT relieves the tedium and removes the human error by rigorously analyzing each tagged net and component against the selected rules.

Which EMC Design Rules?

EMSAT uses the most important EMC printed circuit board (PCB) design rules. Each of these design rules have been completely analyzed using full wave simulation tools, laboratory testing, and finally real-world product testing. IBM requires EMSAT to be used on all new PCB designs and has enjoyed enormous success for passing EMC requirements the first time in the test chamber.

EMSAT Rules include:


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