HP / Agilent 4193A Vector Impedance Meter measures impedance magnitude from 10 Mohms to 120 k ohms and phase from -180.0° to +180.0°. An internal oscillator provides test signals from 400kHz to 110MHz. The test signal is constant current between 10 µA, depending on impedance range (10 ohms-100 k ohms, 5 ranges). The 4193A features test components in circuit and out-of-circuit and standard HP-IB and analog outputs. Other features include auto, hold, manual range control and a 3 1/2-digit display.