This was one of our most ambitious projects in the field of measuring and testing technology and telecommunication. We had to meet military STANAG requirements at the smallest measurements and a curve B radio interference degree -14 dB at 10 kHz to 30 MHz, as well as shock and vibration resistance at full competitive capacity. Other design criteria were broad additional requirements from radio and transmission technology as well as protection class IP35. The biggest challenge was to assure extremely silent forced venting of < 35 dB at 1 m distance to the test item.