to Bob kb8tq: > The idea is partly to lock the two devices. The bigger objective is > to hold the mixer output at the correct zero volt operating point. > Cabling things to a different device and then doing phase correction > to keep things at zero would be a major pain. > Bob All the more reason to switch to the Hittite HMC984LP4E: https://www.analog.com/media/en/technical-documentation/data-sheets/hmc984.pdf Mike