Disclosed is an apparatus and method for high speed tuning to a commanded frequency using a low noise high speed frequency synthesizer employing a learning sequence. A phase-locked loop (PLL) generates the commanded frequency. High speed tuning circuitry high speed tunes the PLL to the commanded frequency. Thereafter, the high speed tuning circuitry is substantially isolated from the PLL, while learning circuitry is employed to learn a correction signal which will enable subsequent more accurate high speed tuning to the commanded frequency.