The Model 107AR/BR Quartz Oscillators are precision oscillators intended for use as frequency or time standards. Sinusoidal output frequencies of 5 Me, 1 Me, and 100 kc are provided. Short-term stability of the 5-Mc output is 1.5 parts in 10*1 (rms), averaged over a 1 second sample period (see Table 1-1, Specifications). Aging rate is less than ±5 parts in ioio per 24 hours. The Oscillator frequency can be electrically varied over a range of ±2 parts in 10^ with a DC voltage of ±5 volts. The Model 107AR and Model 107BR have different power requirements. The Model 107AR is designed to be operated from a regulated DC supply of 22 to 30 volts. The Model 107BR operates from the AC line and has an internal battery supply which provides standby operation when the AC line voltage fails.