The PAV4CR Phase Angle Voltmeter provides complete capability for measurement of the amplitude and phase characteristics of AC voltages. The unit has isolated inputs. Wide frequency coverage of 57Hz to 20kHz in the total mode, wide dynamic range of 300 ?V to 300 V full scale, harmonic filtering and high input impedance of 10 Mohms with or without input isolation are standard. Plug-in modules for filtered mode frequencies are not included. The unit is rack mounting.