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IEC/TR 60444-4 Ed. 1.0 b:1988
Measurement of quartz crystal unit parameters by zero phase technique in a pi-network. Part 4: Method for the measurement of the load resonance frequency fL, load resonance resistance RL and the calculation of other derived values of qu (TITLE TRUNCATED)
Specifies a simple method of measuring load resonance frequency. The method uses the change in resonance frequency which occurs when a load capacitance is inserted in series with the crystal unit.
International Electrotechnical Commission [iec]

