Patent ID: 6968278

Claim:
A method for reducing occurrence of spurs when analyzing signals, the method comprising: mixing a first signal with a local oscillator signal to produce an intermediate signal, including the following: when a spur is predicted to occur when high side mixing is performed but not when low side mixing is performed, performing low side mixing, when a spur is predicted to occur when low side mixing is performed, but not when high side mixing is performed, performing high side mixing, and when a spur is predicted to occur when high side mixing is performed and a spur is predicted to occur when low side mixing is performed, determining whether the spur that is predicted to occur when high side mixing is performed is greater than the spur that is predicted to occur when low side mixing is performed, and when it is determined that the spur that is predicted to occur when high side mixing is performed is greater than the spur that is predicted to occur when low side mixing is performed, performing low side mixing.