Patent ID: 6570458
Filing Date: 2003-05-27
Classification: G01R

Abstract:
A microwave synthesizer for providing stimulus for testing a device under test (DUT), comprising:an narrow-band synthesizer providing an adjustable frequency output; an oscillator providing a substantially fixed frequency output; a comb generator providing a sequence of tones; a first mixer having a first input, a second input, and an output, the first input coupled to the output of the comb generator and the second input coupled to the output of the oscillator; a second mixer having a first input, a second input, and an output, the first input coupled to the output of the comb generator and the second input coupled to the output of the first mixer; a third mixer having a first input, a second input, and an output, the first input coupled to the output of the second mixer and the second input coupled to the output of the narrow-band synthesizer; and a fourth mixer having a first input, a second input, and an output, a first input coupled to the output of the third mixer and a second input coupled to the output of the first mixer.