The USB chip regenerating the signal contains no switching regulators resulting in a lower floor. Each of the three independent voltages to the chip originates from a separate linear power supply (LPS), with further regulation provided by three sets of LT3045 regulators.
A 3ppb OCXO clock runs directly at 24MHz and is connected via a board track just a couple of inches away from the USB chip for the shortest possible path. Nothing is lost within cables and connectors, like an external master 10MHz clock with an additional 24MHz clock generator.
Two independent, Statement-level linear power supplies (LPS), one dedicated to the OCXO clock and the other used for powering the USB chip/5V USB take performance to the extreme.
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