BoardScan Signal Integrity and Crosstalk Module

Screens PCB layouts for nets with crosstalk, ringing, time delays, overshoot, undershoot, settling time and noise margin violations. Once the violation criteria is provided, looking at a graphical view of the board, the engineer can screen one net, a group of nets or entire circuit boards. Because the technique of using this tool is no more than a button-pushing operation, the PCB designer is able to concentrate on the task at hand. For instance, nets can be listed in descending order of crosstalk or the user may restrict the maximum number of nets to be reported. Signal overshoot violations may also be requested. To screen on the basis of signal integrity (i.e. pulse shape) and crosstalk it is necessary that BoardScan do the field analysis associated with the cross-sections of all multiconducter line systems in order to obtain the parasitics. With this data, BoardScan forms the required transmission-line models. To economize on field analysis, BoardScan builds a permanent library of models for each cross-sectional configuration it uncovers. In short, this constructs a permanently held lookup table with very infrequent occasion for subsequent field analysis.

BoardScan Emissions Module

Simulates the electromagnetic emissions immediately above or below a PCB allowing for the identification of problem nets. The simulation can be done during routing or at the post-layout stage. Users can analyze both individual and multiple nets to enable first pass EMC verification by locating the highly radiating "hot spots" and the nets that are the cause. This module, when calculating emissions from a board, accurately deals with emissions from pins and vias as well as from tracks. Even if a board is encapsulated with copper planes as striplines, emissions still occur from component pins and vias protruding above the ground planes. The Omega PLUS Emissions module will show these emissions. For more technical details, download the application note in PDF. Excessive emissions eliminated using only a 5¢ resistor!

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