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 6650-01-095-8024
NSN 5985-01-438-3786
NSN 7035-00-150-2379
NSN 2925-01-065-0060
NSN 5990-01-408-6554
NSN 5960-00-215-3754
NSN 6130-00-275-4399
NSN 5998-01-321-6663
NSN 6240-01-133-4085
NSN 5990-01-105-0260
NSN 5835-01-514-5758
NSN 5996-01-052-4027