Kevin Aylward
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The best SOA for a TCXO is going to be around 0.05 ppm over -40 Deg to 85 Deg to 0.1ppm. Most achieve a bit worse, e.g. 0.5 ppm. XTALS un-compensated are around 20 ppm to 100 ppm. XTAL temperature hysteresis is a killer. OCXO (oven) gets you to the ppb level, in part, because the xtal is not allowed to move, much.
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