Tascam CG-1800 Video Syncmaster Clock GeneratorThe CG 1800 from Tascam is specifically designed for small to large scale video audio synchronization systems. An OCXO (oven controlled crystal oscillator) is used for its high precision and because it's not affected by the temperature of the environment. With a clock frequency precision of 0. 01 ppm the unit delivers high precision synchronization with a frequency stability of + 0. 005 ppm or less per day. External clock jitter is reduced using an