Special Features:

Menu driven operation; clock and message displays; complete status information; automatic logging of major internal events; automatic synchronization of 1pps signal; full clock and frequency control; high-performance cesium beam tube

Properties:

An item that can generate a fundamental frequency with a high degree of accuracy. Harmonics of this fundamental are then used as a reference point for checking throughout the radio spectrum. The standard may be stable crystal oscillator, noncrystal oscillator, tuning fork, atomic beam, molecular beam, gas cell, quantum mechanical resonator, or the like.