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Susceptibility Of Cables To Conducted Immunity/Susceptibility, Fields And Lightning

We will review the EMI requirements to gauge the maximum level of  radiated and conducted  immunity/susceptibility test levels applicable.

Review  signal level and frequency of signals on interface cables and signal and power interface design to calculate  the maximum differential mode and common mode noise immunity of the interface.

Review  cable and connector type as well as shield termination techniques to calculate the  transfer impedance, Zt,  and shielding effectiveness of the of the cables. The data is contained in the book Electromagnetic Compatibility : Methods, Analysis, Circuits, and measurement.

With this data EMC Consulting design proprietary  software, SPICE ,equations contained in the book, And engineering experience and judgement will be used to determine the voltages induced into signal cables. If these levels are above the noise immunity of the interface, improvements to the design or mitigation techniques described in “EMI mitigation techniques: in the web site will be implemented.

Engineering type tests to FCC part 15, MIL-STD-461,  DO-160 and ENXXX can be performed to verify the design  at the breadboard level or prototype level.