NNB 21 Line-impedance Stabilization Network
- NNB 21 Line-impedance Stabilization Network for vehicle (following to CISPR 25/ISO 7637)
Scope of delivery:
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The NNB 21 is designed as a single or bipolar path LISN for measuring of interference voltage for automotive devices and general purpose. It is simple and flexible applicable. For measuring during the development the frequency range was expanded from 200 MHz up to 1 GHz. The NNB 21 is developed for measuring on both lines. So it is not required to modify the measuring setup for bipolar measuring and therefore the measuring accuracy can be improved. For measuring just only one line, the second channel is easy to disable by switching the ‘negative’ line to GND. Mostly the measuring path of the DUT is non 50 Ohm, therefor the NNB 21 is equipped with an internal 10 dB attenuator. So a better adaptation is realised through the attenuation and the measuring results are more reliable.