Chroma 6400 Series Programmable AC Power Source uses state of the art PWM technology to deliver pure, instrument grade AC power at very low cost ever achieved before. The 6400 AC power source offers maximum rated power for the output voltage from 0 to 300VAC, at the frequency from 45 to 1kHz. It is not only suitable for commer- cial applications (47-63Hz), but also for avionics, marine, and military applications at 400Hz. The 6400 Series Programmable AC Power Source generates very clean output with typical distortion less than 0.3%. With the incorporated of power factor correction circuit, the 6400 AC Power Source yields higher efficiency and delivers more output power than competitive instruments. Furthermore, it is capable of providing high peak repetitive cur- rent that is required to drive most electronic prod- ucts with high crest factor input design. The 6400 AC Power Source uses advanced DSP circuit to offer precision and high-speed measure- ment for true RMS voltage, true RMS current, true power, frequency, power factor, and current crest factor. The 6400 AC Power Source is very easy to operate through the front panel keypad, or the remote controller via GPIB, RS-232 or APG (Analog Programming) interface. The optional interface is designed as a plug-in card to change the unit in seconds into a computer controlled system power source. Designed with self-diagnostic routine and protec- tions against over voltage, under voltage, over- power, over current, over temperature and fan fail, the instrument has the qualities and reliability that can suit for the most demanding applications in production tests, R&D design, and QA verification.