Low Cost Noise Sources

Measurements of the EMC is the classic and necessary condition of device testing procedure. In the case of the power EMI filters testing or device immunity, we need simulators of the interfering signal. We are teaching the main principles of EMC in our department. Practical measurements for students are realized in the EMC laboratory. For continual interference testing students had older, but still working, interference simulator; but they need an another one. This paper presents a few types of low cost broadband noise sources. Designed and practical working models could be helpful for everybody who needs to assemble cheap, but good working devices.