With enhanced measurement speed option, E4990A enables passive component manufacturers to realize fast sweep speeds at low frequency. Specifically, operators can use said option with 10, 20, 30, or 50 MHz options for accelerated measurement. Typical basic accuracy is 0.045% over impedance range with 40 V built-in DC bias source, and equivalent circuit analysis function, which supports 7 different multi-parameter models, lets engineers simulate equivalent component parameter values.