At operation 506, as illustrated, a fast repetition rate control signal and a slow repetition rate control signal are provided. The fast repetition rate control signal and the slow repetition rate control signal may be provided using repetition rate control circuitry and the beat tone error. The integral-lead control signal may be applied to the beat tone error, after which the result may be used by slow repetition rate control circuitry and fast repetition rate control circuitry. The fast repetition rate control circuitry applies a gain, and converts the result from a frequency to a voltage providing the fast repetition rate control signal. The slow repetition rate circuitry applies a gain in series with integration, and then converts the result from frequency to voltage providing the slow repetition rate control signal.

At operation 508, as illustrated, a fast carrier envelope offset control signal and a slow carrier envelope offset control signal are provided using carrier envelope offset control circuitry and the carrier envelope offset error. The integral-lead control may be applied to the carrier envelope offset error, after which the result may be used by slow carrier envelope offset control circuitry and fast carrier envelope offset control circuitry. The fast carrier envelope offset control circuitry applies a gain, and converts the result from a frequency to a voltage providing the fast carrier envelope offset control. The slow carrier envelope offset circuitry applies a gain in series with an integration, and then converts the result from frequency to voltage providing the slow carrier envelope offset control signal?.