DIN EN 60444-1:2000-09

Действует

Measurement of quartz crystal unit parameters by zero phase technique in a <pi>-network - Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a <pi>-network (IEC 60444-1:1986 + A1:1999); German version EN 60444-1:1997 + A1:1999 — 26 стр.