Programmable AC Source 0~300V, 15~1.5kHz / 18KVA, 1 or 3 Phase - Chroma's high power 61612 Series uses modern PWM technology to provide a pure programmable AC signal with distortion less then 0.5%. Instrument provides both AC or DC or AC+DC modes to allow testing of the most complex devices. In addition to advanced readback functions the instrument include a power amplifier mode allowing of power replication of almost any wave shape.