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 6320-01-094-2634
NSN 2925-01-434-2502
NSN 6610-00-112-2698
NSN 5915-00-928-5667
NSN 6240-01-036-7798
NSN 2925-00-833-9466
NSN 7035-01-368-4801
NSN 2925-01-351-9748
NSN 2925-01-394-5650
NSN 5935-01-312-2211
NSN 6110-00-359-5571
NSN 2925-00-092-6526