The Keysight 83640B synthesized sweeper is the standard of excellence for applications requiring the high performance and accuracy of a synthesized source and the speed and versatility of a sweep oscillator. Synthesized broadband frequency coverage and precise 1Hz frequency resolution (Opt 008) are generated by indirect synthesis, enabling the 83640B to achieve low single-sideband phase noise performance. It also delivers excellent harmonic performance with harmonics at least 50dB below the carrier from 2.0 to 26.5GHz and at least 40dB below the carrier above 26.5GHz.