SN EN 60444-4 : 1997

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

Defines a simple method for measurement of load resonance frequency fL and load resonance resistance RL, in the frequency range not in excess of 30 MHz. Permits calculation of load resonance frequency ranges and pulling sensitivity as laid down in IEC 122-1, Amd 1.