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© Ransom Stephens 2012
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Electronics Design News’s
Eye on Standards
When will PAM4 take over from NRZ?, 21-Apr-2014
Why total jitter cannot be measured on a scope
Test pattern redemption!
Vote no on PRBS31 (and the problem with journalism...)
PRBS31: slower, costlier, worse
The very short reach of 25 Gb/s
Samtec out-geeks PCIe’s OCuLink
PCI Express update: the next, next, next generation
DLL-based clock recovery cranks up net bandwidths
Measuring ISI at high data rates is impossible
Test patterns are supposed to stress you out
Does OIF have to do everything?
Peace at the plugfest
Receiver Tolerance Testing – with crosstalk!
Deterministic Jitter for High Speed Serial Receiver Tolerance Testing
Top ten reasons to love (and hate) 100 Gigabit Ethernet
Serial standards keep test engineers on edge
Discovery of the Higgs Boson:
Pt 1, Herding cats on the Franco-Swiss border
Pt 2, What they detect
Pt 3, What they actually measure
Pt 4, Identifying the stuff in the detectors
Pt 5, ATLAS and CMS - the biggest test devices on earth
Pt 6, ATLAS and CMS - catching muons and neutrinos
Pt 7, What a Higgs Boson looks like
Pt 8, Is the particle observed at CERN really the HIggs Boson?
Pt 9, What makes King Carl XVI Gustaf think it’s the Higgs Boson?
Partial list of sponsored White papers, Application Notes, and Feature Articles by Ransom Stephens:
Jitter analysis on Oscilloscopes and BERTs
, White paper published and distributed by Anritsu Corp., 2014.
Physical Layer Tests of 100 Gb/s Communications Systems
, Application Note published and distributed by Tektronix Corp., 2012.
Crosstalk problems are back
, feature article for Test & Measurement World, July, 2012.
Crossing the Digital-Analog Divide
, a white paper for Agilent Technologies, 2012.
Critical 100 Gigabit Ethernet Testing: Equalization, Dp-QPSK, and Crosstalk Compliance
, a webinar and App Note for Picosecond Pulse Labs, 2012.
Introduction to Precision Analysis of High Speed Serial Systems and Components
, a webinar and Tech Note for Picosecond Pulse Labs, 2011.
Signal Integrity Analysis at Extreme Data Rates
- focusing on 100 Gb Ethernet to see where we're headed and what we need to anticipate, a White Paper
written for Anritsu, 2010.
(Winner of the 2010 DesignCon Best Paper Award)
A new Technique for Stessed Receiver Tolerance Testing Using Crest Factor Emulation
, with John
Calvin, DesignCon 2010.
Analysis of Random Noise and the Effect of Band-Limited Noise on Stressed-Eye Receiver Tolerance Tests
- with Marcus Mueller, DesignCon 2009.
Characterization of Gaussian Noise Sources
- with Bob Muro, NoiseCom, DesignCon 2008.
The Future of Multi-Clock Systems
- with Roman Boroditsky and Juan Gomez of NEL, DesignCon2008; also available as a White Paper for NEL Frequency
Controls, Inc., 2007.
Using Clock Jitter Analysis to Reduce BER in Serial Data Applications
- an Application Note written without a byline for Agilent Technologies, 2006.
Anticipating, Characterizing, and Avoiding Problems with Crosstalk
- presented at DesignCon in 2006.
Equalization: The Correction and Analysis of Degraded Signals
- a white paper written with a byline for Agilent Technologies. See also, Opening Closed
Eyes: Analysis and Equalization of High Data Rate Signals on Buses and Backplanes - presented at DesignCon2006.
The Rules of Jitter Analysis
- published in the online trade magazine, AnalogZone for Agilent Technologies.
Jitter Analysis: The dual-Dirac model, RJ/DJ, and Q-scale
- a white paper for Agilent Technologies that is the paper most frequently referenced on dual-Dirac
and Q-scale by standards groups and other authors.
Jitterfest: Why Different Jitter Analyzers Give Different Results and Which is Right
- published in the online trade magazine, AnalogZone. See also,
Comparison of Different Jitter Analysis Techniques with a Precision Jitter Transmitter
- white paper describing the results of the study led by Ransom for
Agilent Technologies to determine the accuracy of different jitter analysis methods; and Jitter Analysis: What Works, What Doesn’t, and Why - a web-
seminar presented live that set and attendance record for Agilent Technologies with over 600 viewers when delivered live and a total of over 2000
viewers including the archived broadcast.
Analyzing Jitter at High Data Rates
- published in IEEE Optical Communications.
Measurement of Total Jitter at Low Probability Levels Using the Optimized BERT Scan Method
- with Marcus Mueller and Russ McHugh of Agilent
Technologies - this paper presented a new technique invented by Ransom that reduced test time by a factor of ten with improved accuracy and won a
DesignCon paper award.
Precision Jitter Transmitter
- an application note written with Jim Stimple of Agilent Technologies, documents the most accurate jitter transmitter every made
- developed in a project conceived and led by Ransom.
Back to Basics in Optical Technology
- a day-long seminar created by Ransom and delivered coast-to-coast at the sites of Agilent Technologies’ customers.
Knowledge Series sponsored by Tektronix Instruments:
Answering Next-Gen Serial Challenges
How Stressing a Receiver Removes Stress from a Designer
The Case of the Closing Eye
Acting on an Impulse: Equalization and Emphasis
“Jitter 360” - sponsored by Tektronix, 2005-2006 (download the whole series
The Meaning of Total Jitter
What the Dual-Dirac Model is and What it is Not
All About the Acronyms: RJ, DJ, DDJ, ISI, DCD, ...
Jitter Analysis in Systems with Crosstalk
Clock Recovery in Serial-Data Systems
Reference Clock Jitter and Data Jitter
Measure of Emergence
Sports should adopt real technology
The measure of free will and red herrings
The science and technology of Sensory Deception
Quantum wave functions come alive! May the Bohr Model rest in peace
Decoding the brain using fMRI and YouTube
Global warming/climate change: an easy calculation
Measuring the transition to disaster
Resolving to map the brain: resolution, resolution, resolution
Measure of chaos: When uncertainty runs amok
Measuring gravitational radiation
In search of gravity waves
Getting lucky at trade shows
Noise in the time dimension: the strange case of flicker
Measuring and generating creativity
Can electronic health records save your world?
Measure of holiday calories - the thermodynamic diet
Resolving problems in the infrared
Measure of the mind: connectome
Measure of politics: Polls
Measure of the Olympics
The most cited references in high speed technology
EDN’s Measure of Things
Articles on the science of technology and the technology of Science.
(Sponsored by United Business Media, LLC)
novelist, science writer
Electronics Design News
See the crosstalk in 100 GbE
, All Aboard Article, 18-Apr-2014
Top 5 things I learned at DesignCon2014
, DesignCon blog, 30-Jan-2014
Phase noise analyzers take over from scopes
, How-to Article written
with Michael Dunn, 10-Jan-2014
Battle on the chip!
, DesignCon blog, 20-Dec-2013
Tech paper writing tips: A dark and stormy night
, Around the Circuit
Jitter and BER
High Speed Serial
Extreme Rates and Equalization
Fiber Optic Communication
Mastering Fiber Optic Tehcnology
Clients & Testimonials