影响晶体振荡器稳定性的最大因素是温度
The largest external factor affecting and shifting oscillator performance is temperature. Even if the oscillator operating power is low and thus, self-heating is almost negligible, the ambient temperature affects operating frequency as those changes affect mechanical dimensions and stresses of the quartz crystal.
影响和改变振荡器性能的最大外部因素是温度。即使晶体振荡器工作功率低，自热几乎可以忽略不计，但是环境温度也会影响其工作频率，因为这些变化会影响石英晶体的机械尺寸和应力。
It is important for us to check the performance of the selected oscillator at the extremes of the expected ranges. These ranges are commonly described as:
对我们来说，关键是需要确认所选晶体振荡器的性能是否处于预期的极端温度范围之内。这些工作范围通常被描述为：
- 民用级：-10 ~ +60°C
- 商业级：−20 ~ +70°C
- 工业级：−40 ~ +85°C/105℃
- 汽车级：−40 ~ +125°C/150℃
- 军工级：−55 ~ +125°C
