Eastern OptX began designing and developing fiber optic delay lines for the RF and Microwave communities in 1998. The inherent low loss of fiber optic cable made it possible to initially offer Delay Lines for Radar Target Simulation. Our Microwave Delay Line Technology has since found applications in EW, ECM,ECCM, Altimeter Calibration, Radio Range Emulation, and even some Multi-path Fading applications. Products range from a single delay of RF signals up to 3 GHz, through 8 discreet GPIB and Ethernet programmable delays for signals above 40 GHz. We have delivered systems with time delays in excess of 1000 us (>80 radar miles).