One limitation of OCXOs is their reasonably long heat-up time. The oven-controlled oscillator demands time to stabilize its temperature and get to its optimal running conditions. Spurious modes usually have higher losses than the specified manner and so are As a result more unlikely to oscillate strongly. (Crystal manufacturers generally https://gunnerplgbc.webbuzzfeed.com/31381048/examine-this-report-on-precision-crystal-oscillators