Quantic PMI Model TD-50M4G-CD-SFF is a High-Speed Threshold Detector Designed to operate over the 50 MHz to 4.0 GHz Frequency Range, with an Adjustable Threshold Level of -20 to 0 dBm, and VSWR of 2.6:1 typical. This unit comes in a compact size with SMA Female Connectors on the Input and TTL Output.