（GENUWAY TECHNOLOGY RESONATORS)

FREQUENCY

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. The nominal or desire frequency specified by customer.

FUNDENMENTAL FREQUENCY

The lowest frequency at which a resonator plate will oscillate. The physical dimensions of the plate determine this frequency.

FREQUENCY STABILITY

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.

FREQUENCY TOLERANCE

The Frequency Tolerance are the permission deviation from normal frequency under specific conditions. They include:

• The adjustment tolerance.
• The frequency change dependent on temperature.
• The frequency change dependent on time.
• The frequency change caused by drive level.
• The frequency change due to specified mechanical stress, shock and vibration.

ACCURACY OF ADJUSTMENT

The adjustment tolerance is the permissible deviation from the normal frequency due to variation in manufacture. It is stated as relative to the frequency at a given temperature, generally,25℃.  Standard values are ±10ppm, ±20ppm and ±30ppm.