The TFD-100 series is a 1U, rack mount, modular time and frequency distributor. It provides the precise distribution of any frequency from 1PPS up to 10MHz include most popular standards: 1PPS (TTL), IRIG-DCLS (TTL), 10MHz (TTL and Sine). Time & Frequency Distributor provides a wide range of functional extensions by connecting external devices like generators, signal splitters and counters /timers/meters in one rack mount case.