Crystal Oscillator Is Phase Locked

Dec. 2, 2010

Model PLXO-250 is a phase-locked crystal oscillator (PLXO) from EM Research that provides a stable 250-MHz output signal when fed with a 10-MHz reference source. The oscillator, which measures just 1.5 x 1.5 x 0.6 in. and delivers +7 dBm output power, achieves phase noise of better than -95 dBc/Hz offset 100 Hz from the carrier and better than -140 dBc/Hz offset 10 kHz from the carrier. Harmonics are less than -50 dBc while subharmonics are less than -70 dBc. The oscillator works with a +12-VDC supply.

About the Author

Jack Browne

Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.