Special Features:

Rack mtd; input power 23 to 32 volt ac or dc; output signal freq 20 mhz per sec; sinusoidal wave shape; time scale selector included

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.