VG-827 is a compact, lightweight and low-cost portable video signal generator that maintains compatibility with analog output types of VG series (panel ROM), and made into A4 sized unit by the gate array developed by us. The unit supports horizontal timing accuracy to be set as accurate as one dot. The video output types of RGB analog, RGB digital up to 8 bits, low voltage digital serial outputs (panel link or LVDS) are provided, thus it proves to be an exceptionally useful tool for R and D, inspection and testing, etc. of display units, whether it is a CRT, LCD or PDP.