HP3320B Frequency Synthesizer

The HP3320B provides a dial-select able, low distortion, output frequency from .001Hz to 12.9999MHz over 7 select-able ranges. The frequency is derived from 1 precision frequency source through synthesis technique. At the same time, the output is controlled through a 3 dial select-able attenuator that provides a 50 ohm referenced dBm output that covers from 26.99dBm to -69.99dBm of output at less than .1% distortion. The max output voltage into 50 ohms is 5v. This early 1970's vintage unit was still cutting edge technology at the time. So the key attributes: Precise Frequency Selection, Low Distortion, and controlled / referenced output voltage! This is still a winning combination!