AM-PM Conversion

The change in phase angle between the input and output RF signals as a function of drive level changes. Expressed in degrees per decibel (dB), AM/PM conversion arises from a slowing of the electron beam as electronic interaction increases when RF drive exceeds a level of about 20 dB below saturation drive.
Found on http://www.albacom.co.uk/Web/Site/defence/glossary.html
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