A common general guideline is that you'll need the turning position of your crystal for being ten°C higher in comparison to the upper working temperature of your OCXO oscillator circuit. The transfer operate (or slope polarity) for your VCXO is the path of frequency transform vs . Manage voltage. This https://tcxooscillators48260.activablog.com/30384961/fascination-about-temperature-compensated-crystal-oscillators