Note: The pictures shown here are exemplary extracts from inspection reports and relate to a particular candidate. They are not transferable to other devices or samples. The only purpose is to provide a little insight into the work of test-laboratories.
Even during development it is necessary to think about the electromagnetic compatibility of the component to be developed. A significant influence on both, the electromagnetic susceptibility and the electromagnetic emission, is in the arrangement and geometry of conductors on the circuit board. Other relevant parameters are eg the used frequency, power supply design, grounding and shielding, line filters and much more. Basically, the earlier and more consistent interference suppression is considered at a design, the more inexpensive it is to achieve sufficient electromagnetic compatibility.
The figure shows the coupling of burst pulses by using a coupling clamp to lines of the test object.
During development first tests can be performed already in-house, as some instruments, such as a spectrum analyzer and an artificial mains network (LISN) belong to our equipment pool.
For each test in a laboratory a test report is created. It is handed over to the customer upon completion of the tests. Here an example (taken from a real protocol, model names redacted):