The IZ311B is designed for Tempest measurements of conducted emissions on power lines. The filter is improving suppression of low frequencies below 150kHz in connection with some PLISNs. The insertion loss is very low – below 1.0 dB up to 1 GHz. Insertion loss at 150kHz is 0.7dB. Suppression of fundamental powerline frequency is 105dB (50Hz and 60Hz). Leakage power line volt- age amplitude is less than 2 mV which is much less than limiting threshold of transient limiter. The filter is designed as 3rd order T configuration with 40nF decupling capacitors at the input and output. Maximum operating voltage is 700V rms at 50/60Hz.
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