The Model 212 Phase Angle Voltmeter is a completely transistorized modularized instrument which combines the ability to measure both phase angle and magnitude of complex AC signals and vector compoents with respect to a reference voltage. Designed to operate phase sensitively within a frequency range of 60Hz to 1OKHz, it utilizes passive phase shifter circuits to assure long term stability and high accuracy over the spectrum. Front panel controls permit instantaneous selection of range and function.