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| TAPE AND REEL |
| Refers to the packaging method used to accommodate automated pick & place equipment. |
| TEST SET |
| A device used to measure the frequency and resistance characteristics of a quartz crystal unit. Often called a "crystal impedance meter", abbreviated as "C.I.M.". |
| TRIM SENSITIVITY |
| A measure of the incremental fractional frequency change for an incremental change in the value of load capacitance. Trim sensitivity (S) is expressed in terms of PPM/pF and is calculated with the following equation: S=(C1*1,000,000)/2*CF2, where CF is the sum of the shunt capacitance CO, and the load capacitance CL. |
| TURNOVER TEMPERATURE |
| The temperature at which the frequency is at the top of the parabolic curve. |
| TWINNING |
| A condition existing within a quartz stone wherein the optic and/or the electric axis suddenly reverse its natural order of polarity. |