Yaw

An angular deviation from ideal straight line motion, in which the positioning tables rotates around the Z (vertical) axis as it translates along its travel axis. Source: FRT of America



Yield

Expressed in terms of a formula derived from Poisson Distribution, Y = e**DPU, where e** means e raised to the power of, and DPU stands for Defects per Unit. Using this formula, one can readily predict the yield or incoming (to test) quality of a product. If, for example, you expect to have 0.25 faults per board from production, your incoming quality is e**(0.25) = 77.9%. Source: A.T.E. Solutions, Inc.



The percent of functional units leaving a process. The lower the process yield, the higher the test coverage must be to keep DPM rates low. Source: Mentor Graphics



YIGTuned Oscillator

A high precisioned signal generator in which electrons oscillate within a magnetic field established within a yttriumirongarnet (YIG) alloy by an electronic coil. The current and magnetic strength determines the oscillation frequency. Source: Test & Measurement World, July 2002, page 15



Young’s Modulus

Modulus of elasticity; the amount of stress required to produce a unit change in length (strain). Expressed in pounds per square inch (PSI) or dynes per square cm. Source: JML Optical


