Patent ID: 7747237

Claim:
A method for rapidly generating a signal at an output frequency for use in a communication device comprising: providing a reference signal at a reference frequency to a first signal synthesizer configured to generate a first signal at a first frequency; generating the first signal with the first signal synthesizer; processing the first signal to reduce harmonic cross-coupling thereby creating a processed first signal; providing the reference signal at the reference frequency to a second signal synthesizer configured to generate a second signal at a second frequency; generating the second signal with the second signal synthesizer; processing the second signal to reduce harmonic cross-coupling thereby creating a processed second signal; providing the processed first signal and the processed second signal to a switch; responsive to a control signal; selectively switching the switch to output from the switch either the processed first signal or the processed second signal to create a switch output signal; after switching either the processed first signal or the processed second signal from the switch and for every switching by the switch, changing the setting of a frequency modification module to shift the frequency of the switch output signal to thereby generate a frequency specific signal at a different frequency; and outputting the frequency specific signal on a single output without the frequency specific signal passing through any switches after the shifting of the frequency, wherein selectively switching the switch to output from the switch either the processed first signal or the processed second signal is the only switching when producing the frequency specific signal.