| 摘要 |
The present invention provides a signal generator capable of producing randomly selected coherent output frequencies. Specifically, the proposed generator comprises a first section which generates a carrier frequency, and a second section, containing a chain of frequency multipliers, which is capable of producing a plurality of coherent modulating frequencies. The carrier frequency is first selectively modulated with random ones of the plurality of modulating frequencies to produce high and low sideband and the high and low sidebands are then selectively connected to the output of the generator by a random code.
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