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Steve.Picotest
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Re: Default Settings
Steve.Picotest   9/17/2013 10:49:50 AM
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again, these are good points.  Most oscilloscopes today allow you to store machijne setups.  I save my popular ones and can then recall a particular setup rather than the default.  This is also a great idea for demonstrations, where everything seems to go wrong.  Having the stored setup is often a relief. 

dang32bit
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Default Settings
dang32bit   9/17/2013 10:45:26 AM
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One of the First things I do when working with scopes is hit the Default Setup button.  I have learned from my colleague test engineers spending hours tracking down problems that are due to scope setup rather than DUT output.  ALWAYS run a Default Setup (and a front-end cal, if available).

Steve.Picotest
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Re: And then there are the silly mistakes...
Steve.Picotest   9/13/2013 1:07:49 AM
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We've all done it, so don't feel bad.  With power comes complexity.  Many of the newer scopes have customization capabilities, so you can save your frequenctly used setups.  I do that also for demo's.  If anything can go wrong, it will always occur at a live demo.  

zeeglen
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And then there are the silly mistakes...
zeeglen   9/13/2013 12:24:27 AM
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One of the lesser attributes of digital scopes vs analog is that there are numerous menus to wade through to see setups, whereas with analog scopes the entire setup is immediately visible by visually scanning the knobs and switches.  Just today I was getting very strange results until I finally clued in that I had left one channel on AC coupled from yesterday, a mode I very seldom use.  Yeah, I felt pretty darn silly for overlooking this basic setup.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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