BS EN 60444-4:1997
Current
The latest, up-to-date edition.
Measurement of quartz crystal unit parameters 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
Hardcopy , PDF
English
15-08-1993
Committees responsible
National foreword
Method
1 Scope
2 Measuring circuit
3 Method of measurement
Appendix
A Recommendations regarding the use of load capacitors
Figures
A1 Typical load capacitor with carrier
A2 Method of insertion of load capacitor into pi-network
A3 Circuit diagram of pi-network including load
capacitor C1
A4 Load capacitance inaccuracy as a function of frequency,
for a load capacitance of 30 pF inclusive of calibration
inaccuracy and residual inductance effects (Worst case
situation)
A5 Relative measurement error of fL versus crystal
pulling sensitivity for various frequencies at a load
capacitance of 30 pF
A6 Relative measurement error of R1 versus frequency, for
various values of C1
A7 Relative measurement error of Cl as a function of
frequency
A8 Relative measurement error of C1 as a function of
C1 for various frequency measurement errors C0 =
5 pF; CL1 = 15 pF; CL2 = 30 pF
A9 Relative measurement error of C1 as a function of
C1 for various values of quality factor Q C0 = 3 pF;
CL1 = 15pF; CL2 = 30 pF
Annex ZA (normative) Normative references to international
publications with their corresponding European publications
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