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Troubleshooting engineer gets the jitters

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Mark.Berry
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re: Troubleshooting engineer gets the jitters
Mark.Berry   1/10/2011 7:32:41 PM
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Thanks for your comment. Yeah I'd bet on that too, but what I've learned about inventing and the patent process is that it does include improvements to existing inventions. Our process here at Fujitsu encourages inovation that way. So because an invention exists should stop anyone from submitting an improvent or a working implementation of an idea.

Mark.Berry
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re: Troubleshooting engineer gets the jitters
Mark.Berry   1/10/2011 7:13:39 PM
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Thanks for your comment. Home brew has worked for me in various development enviroments. FNC had and still has quality standards that bounded the set of solutions I could use. IQT used the SJ300 so that sort of limited what I could do. I also limited experience in this area of telecom so I was just applying general test and measurement knowledge to the problem. You probably know well that you don't always have the luxery of time and resources to become an expert on a problem before you're expected to solve it. : )

asdfasdfsdfsdf
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re: Troubleshooting engineer gets the jitters
asdfasdfsdfsdf   1/8/2011 3:00:34 AM
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I hate to be the one to break this to you, Mark, but I'm pretty sure you didn't invent the two-port residual jitter measurement. :)

zeeglen
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re: Troubleshooting engineer gets the jitters
zeeglen   1/7/2011 7:08:33 PM
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Another good story. Mark, I joined FNC about the same time, we might even have been working in different areas on the same project. Surprising that the SJ300 did not have adjustable wander amplitude, but as you say it was designed for DS1 specs. The designers did not anticipate that (unlike a general purpose unit) it might be put to use in other applications. Years ago we had a similar requirement to test wander tolerance on a new product. Since our jitter test equipment did not go below 10 Hz and 5 UI (if I remember correctly), I had to wirewrap a wander generator that slowly walked the 8KHz reference back and forth +-125 usec to ensure the elastic buffers worked as planned (they did). Sometimes it becomes necessary to home-brew test gear when the off-the-shelf gear is not available.

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