Frequency range: 10 mHz to 200 kHz  <−100 dBc distortion (to 20 kHz) Sine, square, white and pink noise 20 μVpp to 40 Vpp output range Linear and log frequency sweeps 25 ppm frequency accuracy Balanced and unbalanced outputs RS-232 and GPIB interfaces The performance of a low distortion analog source and the precision of direct digital synthesis (DDS) is combined in the DS360. With less than 0.001 % total harmonic distortion (THD), 25 ppm frequency accuracy, and a broad range of features including sweeps and bursts, the DS360 is the ideal source for audio frequency applications.