The ANG series of noise generators provide up to 1 W of white Gaussian noise output in several models over the 10 Hz-18 GHz frequency range, with custom options to 40 GHz. Stock availability. The noise, which is diode generated, is amplified and the level can be varied in 1 dB steps from 0 to 10 dB or optionally in 0.1 dB steps from 0 to 111 dB.