The ZPV Vector Voltmeter is designed for critical applications in control engineering and for crystal, antenna, amplifier, and filter measurements. Basic unit consists of a vector voltmeter with two measurement channels measuring voltages by both amplitude and phase, and a microprocessor-controlled analyzer section in which the measured voltage vectors are evaluated, normalized, and converted to the required complex quantities The ZPV-E3, when used with the ZPV, allows vector measurements, two-port and group-delay measurements in 50 Ohm coaxial systems over a wide frequency and amplitude range 300 kHz to 2 GHz frequency range, usable to 2.5 GHz Dual inputs, 50 Ohm impedance Sensitivity on channel A is 1.2 mV, channel B is 5 µV