DIN EN 60444-4:1997-10
Действует
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 f<(Index)L>, load resonance resistance R<(Index)L> and the calculation of other derived values of quartz crystal units, up to 30 MHz (IEC 60444-4:1988); German version EN 60444-4:1997
— 11 стр.
