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Welcome to the BERTScope Newsletter - the latest hints,
tricks and tutorials on
signal integrity measurements from SyntheSys Research, Inc. |
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How-to Articles
Great Resources
What's New at SyntheSys?
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New PCI Express® Test Bench by BERTScope offers complete
5.0 and 2.5 GT/s testing of receivers and transmitters
for add-in card and chip designers.
Read More >> |
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New BERTScope PLA: A Complete PLL Compliance Test Solution
for PCIe Components and Add-In Cards.
Read
More >> |
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and See us at...
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Question:
What is the difference between pre-emphasis and de-emphasis?
Answer:
De-emphasis, which is often used in test and validation vocabulary, and pre-emphasis,
which is commonly used in IC design and simulation, result in the same waveform shape.
The difference in terminology is due to the fact that de-emphasis considers the second
bit in a series of ones or a series of zeroes to be attenuated, whereas pre-emphasis
considers the first bit as sent with a larger drive level.
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Science Puzzler
Q: When you turn on a
light switch, there is a tiny but measurable interval
before the light comes on. How long does it take? What
causes any delay – are you waiting for the electrons
in the wires to reach the light bulb? Once the current
is flowing, how soon does the light bulb begin emitting
visible light?
- Answer
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Quote
of Note
"Borders? I've never
seen one, but I've heard they exist in some people's
minds.“
-
Thor Heyerdahl,
Norwegian Explorer |
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Guess What?
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