The LPRO is designed for long operating periods without maintenance (long life Rb lamp, extended crystal control range) with a goal to exceed 10 years. The design provides a stable frequency with good short and long term stability, and excellent spur performance.
呵呵 不懂得看不明白 懂的不用介绍
http://www.symmetricom.com/media/pdf/manuals/man-lpro.pdf
说明书
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