<div class="section abstract"> <div class="htmlview paragraph">This method is used to define the immunity of electric and electronic apparatus and equipment (products) to radiated electromagnetic (EM) energy.</div> <div class="htmlview paragraph">This method is based on injecting the calibrated radio frequency currents (voltages) into external conductors and/or internal circuits of the product under test, measuring the strength of the EM field generated by this product and evaluating its immunity to the external EM field on the basis of the data obtained.</div> <div class="htmlview paragraph">The method can be utilized only when it is physically possible to connect the injector to the conductors and/or circuits mentioned before.</div> <div class="htmlview paragraph">The method allows:</div> <ol class="list nostyle"> <li class="list-item"> <div class="htmlview paragraph">Evaluating immunity of the product under test to external EM fields of the strength equal to a normalized one;</div></li> <li class="list-item"> <div class="htmlview paragraph">Calculating the level of external EM field strength at which the given (including maximum permissible) induced currents or voltages are generated in the equipment under test, or solving the “opposite” task;</div></li> <li class="list-item"> <div class="htmlview paragraph">Finding potentially “weak” points of the product design (housing, shield, etc.), through which EM energy can enter inside the product.</div></li></ol> <div class="htmlview paragraph">The method capabilities mentioned above define the sphere of its application:</div> <ol class="list nostyle"> <li class="list-item"> <div class="htmlview paragraph">Measurements of electronic product immunity to external EM fields at different conditions (polygons, laboratories, in-situ) as an alternative to direct test methods;</div></li> <li class="list-item"> <div class="htmlview paragraph">Operating instruments for a designer working out the product of a given immunity to external EM fields.</div></li></ol> <div class="htmlview paragraph">This method can’t be directly applied to evaluate the immunity of the equipment under test to the pulse electromagnetic fields. But it can be used to get the initial data necessary to solve this task.</div></div>