关于晶振的频率FREQUENCY和频率稳定性FREQUENCY STABILITY，说明如下：

FREQUENCY频率

The periodic repetition of an event within a unit of time. In an electrical circuit, the number of waves that pass a given point in one second. The number of times a resonator plate oscillated or vibrates in one second or the nominal or desire frequency specified by customer.

指事件在单位时间内的周期性重复。在电路中，指一秒钟内通过给定点的波数。在晶振领域，指谐振器内部石英晶片在一秒钟内振荡或振动的次数或客户指定的标称或期望频率。

FREQUENCY STABILITY频率稳定性

The amount of frequency deviation from the ambient temperature frequency. This deviation is associated with a set of operating conditions including: Operating Temperature Range, Load Capacitance, and Drive Level. This parameter is specified with a maximum and minimum frequency deviation, usually expressed in parts per million, PPM.

指晶振输出频率与环境温度频率的偏差量。这种频率偏差与一系列工作条件有关，包括：工作温度范围、负载电容和驱动电平。此电气参数以最大和最小频率偏差指定，通常以百万分之一（PPM）表示。