关于晶振频率偏差对RF射频类产品的影响，解释如下：

The total tolerance of a crystal is dependent on three factors:
晶体谐振器的总频率偏差基于三个因素：

Production tolerance 生产时造成的频率偏差

Temperature tolerance 温度变化造成的频率偏差

Aging 年老化造成的频率偏差

All of these values are given in [ppm] (parts per million) and can be found in the manufacturer’s data sheet. To get the total maximum tolerance of a certain crystal all these factors must be accounted for.

所有这些数值均以“ppm”(百万分之…)计算，并可在晶振生产厂家的产品手册中找到。若要获得某一晶振的总的最大频率容差，上述三种因素必须全部考虑在内。

For RF devices,Crystal frequency deviation is directly transferred to RF deviation (ie, signal strength, signal distance, data transmission speed, etc), thus a deviation in the crystal oscillator frequency of X ppm leads a deviation in carrier frequency of X ppm. Therefore, it is important to select a crystal with performance within the limits of the RF specifications. Of course, the end products expected age and operating conditions (temperature) must be taken into consideration.

对于RF射频设备来说，晶体谐振器频率偏差会直接转化为射频（RF）偏差（包括信号强度、信号距离、数据传输速度等），从而在晶体振荡器中产生偏差。X ppm的频率导致载频X ppm的偏差。因此，重要的是要选择一个性能在RF规格的限制范围内的晶体。当然，预期的最终产品必须考虑到晶体的年老化率和工作条件（温度）。

了解蓝牙晶振匹配范例，请点击本网站链接：蓝牙芯片QFN32（Bluetooth 5.2）与16MHz晶振