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.
Classification: Parts and accessories of articles of schedule b subheading 9030.39
NSN 5855-01-115-9014
NSN 6150-01-116-6895
NSN 6145-00-871-9112
NSN 5975-01-504-0694
NSN 6145-01-433-2329
NSN 2925-00-231-8041
NSN 5895-01-304-2564
NSN 6320-01-108-5933
NSN 6610-01-039-9295
NSN 5950-01-300-2647
NSN 5965-01-415-2898
NSN 5965-01-262-1722