Measurement of quartz crystal unit parameters - Part 6: Measurement of drive level dependence (DLD) (IEC 60444-6:1995); German version EN 60444-6:1997— 12 стр.
Measurement of quartz crystal unit parameters - Part 6: Measurement of drive level dependence (DLD) (IEC 60444-6:2013); German version EN 60444-6:2013— 21 стр.
Measurement of quartz crystal unit parameters - Part 8: Test fixture for surface mounted quartz crystal units (IEC 60444-8:2016); German version EN 60444-8:2017— 17 стр.