Apparatus and method for determination of the electromagnetic interference emission and interference immunity

摘要

The apparatus (1) for the determination of the electromagnetic interference emission to be examined and interference immunity of an electrical or electronic unit under test (2) by using at least one of a hf - current generating signal source (3), a feeding circuit (4), which between the feeding circuit (4) and a termination circuit (5) placed unit under test (2) as well as an evaluation unit (6), characterized in that the unit under test (2) between the feeding circuit (4) and of the termination circuit (5) electrically short, i.e. in the case of a of 50 ohms various external system with dimensions of less than half a wavelength (λ / 2), is connected.a. for the determination of the interference emission of the unit under test (2) via the injector circuit (4) with the signal source (3) and from this electrically connected with the voltage u_T can be applied is formed, and a with the test sample (2) coupled to the hf - voltage - measuring sensor (7) is provided, which with the evaluation unit (6) is electrically connected andexample, for determining the resistance to interference of the unit under test (2) by means of the termination circuit (5) with a with the signal source (3), which is coupled to the hf - probe head (8) can be acted upon with hf - signals is formed, and the injector circuit (4) with the evaluation unit (6) is electrically connected.