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How-to Articles |
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Stress Calibration for Jitter >1UI – A Practical
Method — Measuring jitter amounts above a bit period can be difficult.
This note describes use of patterns and triggering on a BERTScope to allow such calibration
… Read more |
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USB 3.0 Receiver Compliance Testing —
We review the requirements for SuperSpeed receiver compliance testing with an example using the
BERTScope family of products
…Read more |
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Testing the new 40GBASE-KR interconnect? — 40GBASE-KR is four lanes of
10.3125 Gb/s traffic for backplane applications, whereas 10GBASE-KR is one lane.
Transmitter and Receiver electrical characteristics are measured in exactly the
same way. Receiver interference tolerance testing is also executed the same way, except all
four transmitter lanes in 40GBASE-KR need to be in operation and terminated to provide
crosstalk. See our application note:
10GBASE-KR Compliance Testing |
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Great Resources
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Webcast: New Test Requirements for 40/100 GbE Transceivers: Sponsored
by: Tektronix, SyntheSys Research, Inc. — Learn about some of the newest
physical layer test requirements for the new 40/100 GbE standard as we give an overview
of measurements and solutions in this rapidly evolving field.
›› View On-Demand at Lightwave
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Webcast: Pass USB 3.0 Compliance the First Time:
SyntheSys Research and Test & Measurement World —
We look at the key aspects of transmitter testing, along with the less well understood
topic of receiver compliance, and the areas that frequently catch out the unwary. Benefit
from the considerable test experience we have gained working closely with customers at
Compliance Workshops and in their development labs.
›› View On-Demand at Test &
Measurement World
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What's New at SyntheSys? |
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Jitterman II — See Jitterman help a Younger Engineer with her
USB 3.0 and 20 Gb/s testing using BERTScope in this tongue-in-cheek YouTube video. |
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Check out our new 100GbE applications page — What is the
difference between 100GBASE-ER4/LR4 and 100GBASE-SR10? Find out at the new 100GbE applications
page, pointing you to useful links, application notes, and product solutions …Read more |
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Come and See Us at... |
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OFC 2010
San Diego, California
 March 23–25, 2010 |
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SuperSpeed USB DevCon
Taipei, Taiwan
April 1–2, 2010 |
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SATA-IO Interoperability Workshop
Milpitas, California
April 12–15, 2010 |
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SATA-IO Plugfest #13
Milpitas, California
April 12–15, 2010 |
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PCI Express APAC Compliance Workshop
Taipei, Taiwan
April 19–23, 2010 |
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SuperSpeed USB Compliance Workshop
Portland, Oregon
April 26–30, 2010 |
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DisplayPort (VESA) PlugTest
Milpitas, California
May 16–19, 2010 |
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PCI-SIG Developers Conference 2010
Santa Clara, California
June 23–24, 2010 |
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Question:
What are J2 and J9 measurements?
Answer:
These are jitter measurements used in Ethernet
standards such as 40/100GbE, 802.3ba™. They define two
depths of measurement of an eye, as shown below.
Frequently, stressed eye recipes in recent Ethernet standards specify
values for J2 and J9 as one method of constraining the minimum amount
of stress. Two points define a gradient, and in practice it can be
hard to find a source that exactly matches the slope defined by the
J2/J9 values.
BERTScope Jitter Map has fast, deep, automated measurements
including J2 and J9 with little or no extrapolation (J2/J9 in a few
seconds).
... Read more about Option JMAP for the
BERTScope
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Science
Puzzler
You’ve probably spent a sunny
afternoon lying in the grass, listening to the murmur of a brook. Why do
brooks murmur?
(Click for Answer)
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Quote of Note
“If you trust in yourself, and
believe in your dreams, and follow your star … you'll still get beaten by people
who spent their time working hard and learning things and weren't so lazy.”
— Terry Pratchett,
“A Hat Full of Sky”
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Guess What?
(Click for answer) |
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