New design approach of FPGA based control system and implementation result in KSTAR

The frequency modulation (FM) reflectometer in KSTAR is under commissioning to measure the electron density profile which focused on edge area of plasma. This diagnostic system generated order of tens MHz output signal from an intermediate frequency (IF) amplifier after a radio frequency (RF) mixer. An arbitrary waveform generator is also required for triggering a fast frequency sweep source. We have developed a data acquisition system with multi-functions which composes several digitizers and waveform generator for KSTAR reflectometer. Along with this typical hardware system, we have newly developed a field programmable gate array (FPGA) based signal controller. This customized board adapts FPGA Mezzanine Card (FMC) as a daughter board within single package of 3U Compact PCI form factor. We have been evaluating Experimental Physics and industrial control system (EPICS) input output controller (IOC) over an embedded PowerPC processor on several customized hardware. Using previous result of investigation, this new processor embedded digitizer supports full function of EPICS including KSTAR standard software framework.