Ultra- Low Noise References
Ultra-low noise sources use a variety of techniques to minimize phase noise. Invariably the source is an OCXO. The device maybe locked to GNSS or a Rubidium reference- but the lowest phase noise source available is an OCXO. Whether you are locking the OCXO- amplifying or distributing- any of the mentioned processes degrade the OCXO. For Ultra-Low noise sources extra care must be taken to preserve the phase noise. This typically translates into more expensive amplifiers, low ripple power supplies and in some cases vibration isolators to prevent mechanical vibration from compromising phase noise. The resulting sources find application in high frequency telecom where the base phase noise must be very low due to the degradation in phase noise that takes place in frequency multiplication (20*log(Ft/Fr)). Other applications frequently involve a process with high speed analog to digital conversion where clock jitter degrades the noise floor of the device. The products presented evolved out of addressing a unique application. Feel free to contact the factory if a custom solution is required.