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Phase Noise

Phase Noise can also be an important consideration for many broadband frequency converter applications. Ideally, the frequency converter should not add any phase noise to the converted signal. Unfortunately, all converter Local Oscillators (LO's) add phase noise to the desired signal. Depending on the application, the phase noise can alter signal properties that may be important for proper system function. For example, using a broadband radar chirped pulse to measure velocity by phase changes would be adversely affected by additional phase noise/signal jitter. Another potential problem created by added LO phase noise is that weak signals can be obscured by larger signals with added phase noise, limiting the spectral simulations systems' ability to accurately reproduce certain scenarios.

Phase Noise

Designing LO synthesizers for very low phase noise is a subject of vast proportions. For coherent broadband converters, the LO synthesizers are typically locked to an external crystal source, which in part makes the phase noise of the converter close into the LO a function of the reference. Our converters use a variety of techniques to employ resonators of high quality factor, fabricated by us and polished to our standards, creating LO's with particularly low phase noise. The result: our converters are nearly 10 dB lower in phase noise than industry leading Arbitrary Waveform Generators (AWG).