The HP Model 4275A Multi-frequency LCR Meter is a high performance, fully automatic test instrument designed to measure the vari- ous component measurement parameter values of an impedance element in the relatively high frequency region. The 4275A measures inductance {L},. capacitance (C), -resistance (R),dissipation factor (D), quality factor (Q), conductance (G), susceptance (B), reactance (X) and, in addition, the absolute value of the vector impedance (Z|) and phase angle (8) over a wide range with high accuracy and speed. The wide range measurement capabilities of the model 4275A are enhanced by the 12 spot test frequencies selectable from 1OkHz up to 10MHz in a 1-2-4-10 sequence, including two optional frequencies.