Quantic PMI Model PS-618-45-12B-SFF OPT1518 is a digitally tuned phase shifter optimized over the 15 to 18 GHz frequency range for a fine-tuning range of 45°. This unit is tuned using twelve TTL control bits. Housing size is 3.25" x 2.0" x 0.5" with a 25 Pin subminiature D male connector for power/control and SMA female connectors.