IEC TR 60444-4:1988 : Title: 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 quartz crystal units, up to 30 MHz Pages: 25 Year: Publisher: International Electrotechnical Commission Availability: Within 1-2 working days
IEC will directly send the standards to End-User after our confirmation.