Offering tunable frequencies from 1 Hz to 100 MHz, TDDS100-48 Direct Digital Synthesized RF Signal Source features minimum of 0 dBm output power that is available from its SMA female socket. Laboratory-quality device can be swept in steps as low as 1 Hz between any two frequencies in specified range. Frequency changes are phase-continuous, so there are no glitches and phase noise is better than -140 dBc at 100 kHz. Second and third harmonics are below -60 dBc at 10 MHz.