The TDDS100-48 is a Laboratory-quality, Direct Digital Synthesized RF Signal Source with minimum of 0dBm output power over a frequency range of 1Hz to 100MHz. The TDDS100-48 is the smallest USB controlled DDS synthesized source available. The source can be swept in step size as low as 1Hz between any two frequencies in its specified range. Frequency changes are phase continuous (i.e. no glitches).