scope:

This standard specifies a simple method of measurement of resonance frequency and resonance resistance of quartz crystal units and describes a suitable measuring network. The measuring method and the network are suitable for use over the frequency range 1 MHz to 200 MHz with a fractional frequency accuracy of the order of 10^-6 with a reproducibility of 10^-8 depending on the type of crystal unit being measured, and an accuracy of the measurement of resonance resistance of ± 2% to ± 5% depending on the accuracy of the voltage measurement. However, above approximately 100 MHz the use of this measuring method is limited by the effects of the shunt capacitance C9₀ of the crystal unit under test. To enable the measuring method to be used under these conditions, the use of some method of C₀ compensation is advisable.