BS 7681-4(1993) : 1993 AMD 9660
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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MEASUREMENT OF QUARTZ CRYSTAL UNIT PARAMETERS BY ZERO PHASE TECHNIQUES IN A PI-NETWORK - METHOD FOR THE MEASUREMENT OF THE LOAD RESONANCE fL, LOAD RESONANCE RESISTANCE RL AND THE CALCULATION OF OTHER DERIVED VALUES OF QUARTZ CRYSTAL UNITS, UP TO 30 MHZ
15-10-1997
23-11-2012
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 CL
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 RL versus frequency,
for various values of CL
A7. Relative measurement error of C1 as a function of
C1 for various frequency measurement errors
CO = 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 CO = 3 pF; CL1 = 15 pF; CL2 = 30 pF
Specifies a simple method of measuring load resonance frequency fL and load resistance Rl in the frequency range up to 30 MHz. Includes detailed diagrams. AMD 9660 RENUMBERS THIS STANDARD
| Committee |
ECL/11
|
| DevelopmentNote |
Renumbered and superseded by BS EN 60444-4 (11/2005)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| IEC TR 60444-4:1988 | Similar to |
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