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Pin- and schottky diodes combined with a multi-stage 10dB attenuator result in a device which can withstand a continuous RF input level of up to 5W (37 dBm). A gas discharge tube provides additional protection against high voltage transients. Furthermore, a 9 kHz high pass filter suppresses harmonics of the mains supply voltage.
With a limiting threshold of +11dBm and a flat frequency response from 9 kHz to 600 MHz, the TBFL1 limiter can be used as protective device for the complete range of conducted noise measurements and in many other applications.