| 摘要 |
A system for generating two signals whose frequencies remain a desired difference from each other while the frequencies for both of the electromagnetic signals vary through multiple ranges of output frequencies. The system includes first, second, and third tunable synthesizers, and a first and second mixers. The first tunable synthesizer produces signals varied through a range of frequencies, while the second and third a first and second fixed signals each having a first frequency. The first mixer receives the signals from the first and second tunable synthesizers, combines the signals to generate a first set of output signals having a first range of output frequencies. The second mixer receives the signals from the first and third tunable synthesizers, combines the signals to generate a second set of output signals having a second range of output frequencies, the first and second range of output frequencies differing by a desired difference.
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