ENVIRONMENTAL EFFECTS ON THE MEDIUM AND LONG TERM FREQUENCY STABILITY OF QUARTZ OSCILLATORS

The medium and long term frequency stability of most quartz oscillators is degraded by various environmental effects, the most important of which appear to be acceleration, temperature, load change, pressure, and possibly humidity. In this paper we show preliminary data which indicate that the medium and long term frequency stability of some oscillators can be improved by controlling the pressure and humidity around the oscillator. controlled by a fifth-overtone, AT-cut resonator of the BVA style, we measured