Test & Measurement World, July/August 2012

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Online now at Check out these exclusive features on the Test & Measurement World Website: Join the conversation! Add your comments to the T&MW blogs: Do you remember your fi rst scope? Senior Editor Janine Love invites you to share your fond (and not so fond) memories of your first oscilloscope. Demonstrating enclosure resonance There are times when an increase in harmonic content can't completely be explained by circuit or PC board design. If you've already done a good EMC design and are still getting radiated emission problems, then perhaps resonances in the product enclosure are, in effect, amplifying the internal harmonics. Kenneth Wyatt explains. Touch me 'cause you can! ISAQ 100 Secure Data Acquisition • High precision measurements 18 bit resolution, 2 Mbit/s • Potential free measurements Up to 3 km optical data transfer • Absolute safety Galvanic Isolation > 1 MV On-desk operation up to 1000 V • Wide input range ±250 V max. input range • Outstanding portability 8000 hours battery power Light weight and compact design • Simple integration OLE automation interface The perfect choice for EMC critical areas and high voltage applications! Find out more at: Smart Measurement Solutions 120410_Hands_halfpage_V2_PMA.indd 1 Test & Measurement World | JULY/AUGUST 2012 | –6– 10.04.2012 10:23:15 DLL-based clock recovery cranks up net bandwidths To meet the bandwidth demands, ever more robust clock recovery schemes are necessary. But, 25% over- head is too high. Enter DLLs (delay locked loops), whose reduced power, size, and complexity combine with simpler transfer functions and improved stability enable clock-recovery circuits to remain locked after dozens of identical bits. Explain this Senior Technical Editor Martin Rowe needs you to explain something to a non-engineer: how Internet Protocol phones work. Stay connected with T&MW Join us for discussions about test topics: LinkedIn:

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