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Term: Mode of Operation Definition: The Mode of Operation of a quartz device is one of the factors that will determine the frequency of oscillation. For “AT” cut quartz crystals, overtone modes are at odd frequency harmonics. For example, a crystal may operate at its fundamental frequency of 10 MHz, or at odd harmonics of approximately 30 MHz (Third Overtone), 50 MHz (Fifth Overtone) and 70 MHz (Seventh Overtone).
Cardinal Components
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