Method and apparatus for tuning a synthesizer

A method of tuning a frequency synthesizer device toward a prescribed frequency, the method comprising:

• selecting, from a memory storing a plurality of prescribed coarse curves in a sequential frequency order, a first coarse curve of the set of prescribed coarse curves for producing first output signals having a first output frequency at an output of the frequency synthesizer;
• comparing the prescribed frequency and the first output frequency to produce a magnitude value;
• and
• selecting a second coarse curve of the set of coarse curves as a function of the magnitude value for producing second output signals having a second output frequency at the output of the frequency synthesizer closer than the first output frequency to the prescribed frequency, wherein the second coarse curve is selected out of the sequential frequency order as a function of the magnitude value.

A computer program product for use on a computer system for tuning a frequency synthesizer device toward a prescribed frequency, the computer program product comprising a tangible, non-transient computer usable medium having computer readable program code thereon, the computer readable program code comprising:

• program code for selecting, from a memory storing a plurality of prescribed coarse curves in a sequential frequency order, a first coarse curve of the set of prescribed coarse curves for producing first output signals having a first output frequency at an output of the frequency synthesizer;
• program code for comparing the prescribed frequency and the first output frequency to produce a magnitude value;
• and
• program code for selecting a second coarse curve of the set of coarse curves as a function of the magnitude value for producing second output signals having a second output frequency at the output of the frequency synthesizer closer than the first output frequency to the prescribed frequency, wherein the second coarse curve is selected out of the sequential frequency order as a function of the magnitude value.