Merge branch dlamprid-efts2017

presentations/WR_Dimitris_EFTS_2017/Makefile

+all : wr_efts_2017.pdf
+
+.PHONY : all clean
+
+wr_efts_2017.pdf : wr_efts_2017.tex
+	pdflatex $^
+	pdflatex $^
+
+clean :
+	rm -f *.eps *.pdf *.dat *.log *.out *.aux *.dvi *.ps *.nav *.snm *.toc *.vrb
+

presentations/WR_Dimitris_EFTS_2017/lab/Makefile

+all : wr_lab_efts_2017.pdf
+
+.PHONY : all clean
+
+wr_lab_efts_2017.pdf : wr_lab_efts_2017.tex
+	pdflatex $^
+	pdflatex $^
+
+clean :
+	rm -f *.eps *.pdf *.dat *.log *.out *.aux *.dvi *.ps *.nav *.snm *.toc *.vrb
+

presentations/WR_Dimitris_EFTS_2017/lab/wr_lab_efts_2017.tex

+\documentclass{beamer}
+\mode<presentation>
+
+\setbeamertemplate{navigation symbols}{}
+\setbeamertemplate{footline}[frame number]
+
+\usepackage{listings}
+\lstset{
+  framexleftmargin=-10pt,
+  framexrightmargin=10pt,
+  basicstyle=\tiny\ttfamily,
+  frame=trBL,
+  frameround=fttt
+}
+
+\title{White Rabbit Lab}
+\author{Dimitrios Lampridis}
+\institute{CERN BE-CO\\Hardware and Timing section}
+\date[29 June 2017]{European Frequency and Time Seminar\\Besançon, 29 June 2017}
+
+
+\begin{document}
+
+\frame[plain]{\titlepage}
+
+\begin{frame}{Setup}
+  \begin{itemize}
+  \item 1x WR Switch (free-running master)
+  \item 2x standard PCs equipped with PCIe-based WR nodes (slaves)
+  \item 2x FMC-DIO attached to the PCIe boards
+  \item 1x Oscilloscope to monitor all three PPS signals
+  \item 1x laptop PC with two network interfaces running Nagios
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Tasks already performed}
+  \begin{enumerate}
+  \item Hardware installation
+  \item OS installation: Debian GNU/Linux 9
+    \begin{itemize}
+    \item username: \textcolor{red}{wrdemo}, password: \textcolor{red}{efts2017}
+    \end{itemize}
+  \item Software download from Open HW Repository
+    \begin{itemize}
+    \item \url{www.ohwr.org/projects/spec-sw/wiki}
+    \item \url{www.ohwr.org/projects/wr-cores/wiki/Wrpc_core}
+    \end{itemize}
+  \end{enumerate}
+  \begin{lstlisting}[title=\ttfamily\scriptsize{as user (\textcolor{red}{\$})}]
+    $ mkdir -p ~/Desktop/EFTS2017/binaries
+    $ cd ~/Desktop/EFTS2017/binaries
+    $ wget http://www.ohwr.org/attachments/download/5043/wrpc-v4.0_binaries.tar
+    $ cd ..
+    $ git clone git://ohwr.org/fmc-projects/spec/spec-sw.git
+    $ cd spec-sw
+    $ git submodule update --init
+  \end{lstlisting}
+  \begin{lstlisting}[title=\ttfamily\scriptsize{as root (\textcolor{red}{\#})}]
+    $ sudo su
+    # mkdir -p /lib/firmware/fmc
+    # cd /lib/firmware/fmc
+    # wget http://www.ohwr.org/attachments/download/4057/spec-init.bin-2015-09-18
+    # ln -s spec-init.bin-2015-09-18 spec-init.bin
+  \end{lstlisting}
+\end{frame}
+
+
+\begin{frame}[fragile]{Task 1: Build and load device drivers}
+  \begin{enumerate}
+  \item Build all the necessary driver modules
+  \item Load the driver modules
+  \item Use \texttt{dmesg} to verify detection of HW
+  \end{enumerate}
+  \begin{lstlisting}
+    $ cd ~/Desktop/EFTS2017/spec-sw
+    $ make
+
+    $ sudo insmod fmc-bus/kernel/fmc.ko
+    $ sudo insmod kernel/spec.ko
+
+    $ sudo dmesg
+  \end{lstlisting}
+  \begin{lstlisting}[title=\ttfamily\scriptsize{sample dmesg output}]
+    spec 0000:20:00.0: probe for device 0020:0000
+    spec 0000:20:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
+    spec 0000:20:00.0: setting latency timer to 64
+    spec 0000:20:00.0: got file "fmc/spec-init.bin", 1485236 (0x16a9b4) bytes
+    spec 0000:20:00.0: FPGA programming successful
+    spec 0000:20:00.0: mezzanine 0
+    Manufacturer: CERN
+    Product name: FmcDio5cha
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Task 2: FPGA reprogramming}
+  \begin{enumerate}
+  \item Extract the WR reference design bistreams
+  \item Load the WR PTP core FPGA bitstream
+  \item Watch the scope for PPS signals, note performance
+  \end{enumerate}
+  \begin{lstlisting}
+    $ cd ~/Desktop/EFTS2017/binaries
+    $ tar zxvf wrpc-v4.0_binaries.tar.gz
+
+    $ cd ~/Desktop/EFTS2017/spec-sw
+    $ sudo tools/spec-fwloader ../binaries/spec/spec_wr_ref_top.bin
+
+    $ sudo dmesg
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Task 3: Start the WRPC shell}
+  \begin{enumerate}
+  \item Access the WRPC shell via the Virtual UART
+  \item Start the monitor and study the output
+    \begin{itemize}
+    \item consult Appendix B of the manual (Desktop/EFTS2017/doc/)
+    \end{itemize}
+  \item Estimate fiber length ($fiber\ propagation\ delay\approx 5ns/m$)
+  \item Unplug the fiber, watch the monitor
+  \item Re-plug the fiber, watch the monitor
+  \end{enumerate}
+  \begin{lstlisting}
+    $ cd ~/Desktop/EFTS2017/spec-sw
+    $ sudo tools/spec-vuart
+
+    wrc# gui
+  \end{lstlisting}
+  \begin{itemize}
+  \item Press \emph{Enter} after starting the VUART to get the shell prompt
+  \item Press \emph{ESC} to exit from the monitor back to shell
+  \item Press \emph{Ctrl+A} to exit the shell
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]{Task 4: Configuration}
+  \begin{enumerate}
+  \item Add an initialization script
+  \item Add an SFP calibration database
+  \item Restart the WR PTP core
+  \item Watch the scope for PPS signals, note performance
+  \item Start the monitor and note differences
+  \item Re-estimate fiber length
+  \end{enumerate}
+  \begin{lstlisting}
+    wrc# init show
+    wrc# init erase
+    wrc# init add ptp stop
+    wrc# init add sfp match
+    wrc# init add mode slave
+    wrc# init add ptp start
+    wrc# init add ip set 10.1.100.1 (or 10.1.100.2)
+    wrc# init show
+
+    wrc# sfp show
+    wrc# sfp erase
+    wrc# sfp match
+    wrc# sfp add AXGE-1254-0531 180667 148735 72169888
+    wrc# sfp show
+    wrc# sfp match
+
+    wrc# init boot
+
+    wrc# gui
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]{Task 5: Mess around!}
+  \begin{enumerate}
+  \item Attach very long fiber
+  \item Use monitor to estimate fiber length
+  \item Verify phase tracking, watch the scope
+  \item Disable phase tracking (hidden command!)
+  \item Heat up long fiber, watch monitor and scope
+  \item Let fiber cool down, watch monitor and scope
+  \item Re-enable phase tracking, repeat experiment
+  \end{enumerate}
+  \begin{lstlisting}
+    wrc# ptrack disable
+    wrc# gui
+    (ESC)
+    wrc# ptrack enable
+    wrc# gui
+  \end{lstlisting}
+\end{frame}
+
+\begin{frame}{SNMP Demo}
+  \begin{center}
+    Nothing to do, just watch :)
+  \end{center}
+\end{frame}
+
+\end{document}

presentations/WR_Dimitris_EFTS_2017/wr_efts_2017.tex

+\documentclass[compress, red]{beamer}
+\mode<presentation>
+
+\usepackage{etex}
+\setbeamertemplate{navigation symbols}{}
+%\usepackage{pgfpages}
+%\usepackage{listings}
+
+\usetheme{Warsaw}
+
+% define your own colors:
+\definecolor{Red}{rgb}{1,0,0}
+\definecolor{Blue}{rgb}{0,0,1}
+\definecolor{Green}{rgb}{0,1,0}
+\definecolor{magenta}{rgb}{1,0,.6}
+\definecolor{lightblue}{rgb}{0,.5,1}
+\definecolor{lightpurple}{rgb}{.6,.4,1}
+\definecolor{gold}{rgb}{.6,.5,0}
+\definecolor{orange}{rgb}{1,0.4,0}
+\definecolor{hotpink}{rgb}{1,0,0.5}
+\definecolor{newcolor2}{rgb}{.5,.3,.5}
+\definecolor{newcolor}{rgb}{0,.3,1}
+\definecolor{newcolor3}{rgb}{1,0,.35}
+\definecolor{darkgreen1}{rgb}{0, .35, 0}
+\definecolor{darkgreen}{rgb}{0, .6, 0}
+\definecolor{darkred}{rgb}{.75,0,0}
+
+\xdefinecolor{olive}{cmyk}{0.64,0,0.95,0.4}
+\xdefinecolor{purpleish}{cmyk}{0.75,0.75,0,0}
+
+\useoutertheme[subsection=false]{smoothbars}
+
+% include packages
+\usepackage{subfigure}
+\usepackage{multicol}
+\usepackage{amsmath}
+\usepackage{epsfig}
+\usepackage{graphicx}
+\usepackage[all]{xy}
+%\xyoption{arc}
+\usepackage{url}
+\usepackage{multimedia}
+\usepackage{hyperref}
+\usepackage{helvet}
+\usepackage[english]{babel}
+\usepackage[utf8]{inputenc}
+\usepackage{changepage}
+\usepackage{textcomp}
+     
+\newcommand{\backupbegin}{
+   \newcounter{framenumberappendix}
+   \setcounter{framenumberappendix}{\value{framenumber}}
+}
+\newcommand{\backupend}{
+   \addtocounter{framenumberappendix}{-\value{framenumber}}
+   \addtocounter{framenumber}{\value{framenumberappendix}} 
+}
+
+\graphicspath{ {../../figures/} }
+
+\usepackage[font=small,skip=0pt]{caption}
+\captionsetup{labelformat=empty,labelsep=none}
+%\setlength{\abovecaptionskip}{5pt plus 3pt minus 2pt}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Title Page Info %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\title[White Rabbit\hspace{3em}\insertframenumber/\inserttotalframenumber]{White Rabbit}
+\author{Dimitrios Lampridis}
+\institute{CERN BE-CO\\Hardware and Timing section}
+\date[29 June 2017]{European Frequency and Time Seminar\\Besançon, 29 June 2017}
+
+\AtBeginSection[]
+{
+  \begin{frame}<beamer>{Outline}
+    \tableofcontents[currentsection]
+  \end{frame}
+}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Begin Your Document %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{document}
+%\setbeamertemplate{caption}{\raggedright\insertcaption\par}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\frame{\titlepage}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}<beamer>{Outline}
+  \tableofcontents
+\end{frame}
+
+\section{Introduction}
+\subsection{}
+%=======================
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}{What is White Rabbit?}
+
+\begin{columns}[c]
+	\column{0.8\textwidth}
+	  \begin{itemize}
+		\item Renovation of accelerator's control and timing
+		\item Based on well-known technologies
+		\item Open Hardware and Open Software with commercial support
+		\item International collaboration
+    \item Many users: CERN, GSI, KM3NET, cosmic ray detectors, metrology labs...
+	  \end{itemize}
+	\column{0.3\textwidth}
+		\begin{center}
+		\includegraphics[width=1.0\textwidth]{logo/WRlogo.pdf}
+		\end{center}
+	\end{columns}
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{Why we use Open Hardware ?}
+  \begin{center}
+    \includegraphics[width=.7\textwidth]{ohwr/commercial_and_open.pdf}
+  \end{center}
+  \begin{itemize}
+    \item Get a design just the way we want it
+    \item Peer review and design re-use
+    \item Healthier relationship with companies
+  \end{itemize}
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{White Rabbit: an \emph{extension} of Ethernet}
+\begin{columns}[c]
+  \column{.5\textwidth}
+ 
+  \begin{itemize}
+      \item Standard Ethernet network
+      \item Ethernet features (VLAN) \& protocols (SNMP)
+    \end{itemize}
+    \begin{itemize}
+      \item \color{Blue}{High accuracy synchronization}
+      \item \color{Red}{Reliable and low-latency Control Data}
+  \end{itemize}
+
+  \column{.6\textwidth}
+    \begin{center}
+    \includegraphics[height=1.05\textwidth]{network/wr_network-enhanced_pro.pdf}
+    \end{center}
+\end{columns}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\begin{frame}{White Rabbit application examples}
+
+  \begin{columns}[c]
+    \column{0.7\textwidth}
+  \begin{itemize}
+      \item<1-> \color<2->{black!50}{CERN and GSI}
+      \item<2-> \color<3->{black!50}{HiSCORE: Gamma\&Cosmic-Ray experiment}
+      \item<3-> \color<4->{black!50}{The Large High Altitude Air Shower Observatory}
+      \item<4-> \color<5->{black!50}{MIKES: Centre for metrology and accreditation}
+      \item<5-> {KM3NET: European deep-sea neutrino telescope}
+    \end{itemize}
+
+    \column{0.45\textwidth}    
+    \begin{center}
+      \includegraphics<1>[width=0.80\textwidth]{applications/gsiANDcern.pdf}
+      \pause
+      \includegraphics<2>[width=1\textwidth]{applications/tunka.pdf}
+      \pause
+      \includegraphics<3>[width=1\textwidth]{applications/lhaaso.pdf}
+      \pause
+      \includegraphics<4>[width=.7\textwidth]{applications/mikes.pdf}
+      \pause
+      \includegraphics<5->[width=1\textwidth]{applications/KM3NeT.pdf}
+    \end{center}
+
+  \end{columns}
+  \pause
+    {\small More WR collaborators: \url{http://www.ohwr.org/projects/white-rabbit/wiki/WRUsers}}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{Technology}
+\subsection{}
+
+\begin{frame}{White Rabbit technology}
+  \begin{block}{Based on}
+    \begin{itemize}
+      \item Gigabit Ethernet over fiber
+      \item IEEE-1588 protocol
+    \end{itemize}
+  \end{block}
+  \pause
+  \begin{block}{Enhanced with}
+    \begin{itemize}
+      \item Layer 1 syntonization
+      \item Digital Dual Mixer Time Difference (DDMTD)
+      \item Link delay model
+    \end{itemize}
+  \end{block}
+\end{frame}
+
+\begin{frame}{Open Systems Interconnection(OSI) network model}
+  \begin{center}
+    \includegraphics<1>[width=.6\textwidth]{misc/osi_layers_0.pdf}
+    \includegraphics<2>[width=.6\textwidth]{misc/osi_layers_7.pdf}
+    \includegraphics<3>[width=.6\textwidth]{misc/osi_layers_6.pdf}
+    \includegraphics<4>[width=.6\textwidth]{misc/osi_layers_5.pdf}
+    \includegraphics<5>[width=.6\textwidth]{misc/osi_layers_4.pdf}
+    \includegraphics<6>[width=.6\textwidth]{misc/osi_layers_3.pdf}
+    \includegraphics<7>[width=.6\textwidth]{misc/osi_layers_2.pdf}
+    \includegraphics<8>[width=.6\textwidth]{misc/osi_layers_1.pdf}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Ethernet switches in a nutshell}
+  \begin{center}
+    \includegraphics<1>[width=.6\textwidth]{misc/osi_layers_eth_sw.pdf}
+    \includegraphics<2->[width=.3\textheight]{misc/home_switch.png}
+    \includegraphics<2->[width=.7\textheight]{misc/prof_switch.png}
+
+    \includegraphics<2>[width=.8\textwidth]{misc/switch_in_nutshell_mac.pdf}
+    \includegraphics<3>[width=.8\textwidth]{misc/switch_in_nutshell_1-2_mac.pdf}
+    \includegraphics<4>[width=.8\textwidth]{misc/switch_in_nutshell_1-3_mac.pdf}
+    \includegraphics<5>[width=.8\textwidth]{misc/switch_in_nutshell_1-2_3-1_mac.pdf}
+  \end{center}
+\end{frame}
+
+\begin{frame}{White Rabbit in OSI model}
+  \begin{center}
+    \includegraphics<1>[width=.6\textwidth]{misc/osi_layers_WR.pdf}
+  \end{center}
+  %\begin{center}
+  %  \begin{adjustwidth}{-1.5em}{-1.5em}
+  %  \includegraphics<2>[width=1.1\textwidth]{misc/switch-and-osi.pdf}
+  %  \end{adjustwidth}
+  %\end{center}
+\end{frame}
+
+\begin{frame}{White Rabbit technology}
+  \begin{block}{Based on}
+    \begin{itemize}
+      \item Gigabit Ethernet over fiber
+      \item IEEE-1588 protocol
+    \end{itemize}
+  \end{block}
+  \begin{block}{Enhanced with}
+    \begin{itemize}
+      \item Layer 1 syntonization
+      \item Digital Dual Mixer Time Difference (DDMTD)
+      \item Link delay model
+    \end{itemize}
+  \end{block}
+\end{frame}
+
+\begin{frame}{Precision Time Protocol (IEEE 1588)}
+\begin{columns}[c]
+  \column{.4\textwidth}
+    \begin{center}
+      \includegraphics[height=5cm]{protocol/ptp_exchange.pdf}
+    \end{center}
+  \column{.75\textwidth}
+    \begin{itemize}
+	  \item Frame-based synchronization protocol.
+    \item Simple calculations:
+    \begin{itemize}
+      \item link $delay_{ms}$ $\delta_{ms} = \frac{(t_{4}-t_{1}) - (t_{3}-t_{2})}{2}$
+      \item clock $offset_{ms} = t_{2} - t_{1} + \delta_{ms}$
+    \end{itemize}
+    \item<2> Disadvantages
+    \begin{itemize}
+      \item assumes symmetry of medium
+      \item all nodes have free-running oscillators
+      \item frequency drift compensation vs. message exchange traffic
+    \end{itemize}
+  \end{itemize}
+\end{columns}
+\end{frame}
+
+\begin{frame}{Layer 1 Syntonization}
+ %\begin{block}{Common clock for the entire network}
+  \begin{itemize}
+    \item All network devices use the same physical layer clock.
+    \item Clock is encoded in the Ethernet carrier and recovered by the receiver chip.
+    \item Phase detection allows sub-ns delay measurement.
+  \end{itemize}
+%\end{block}
+\vspace{-0.2cm}
+  \begin{center}
+  \includegraphics[height=4.5cm]{misc/synce_v3.pdf}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Digital Dual Mixer Time Difference}{DDMTD}
+
+  \begin{itemize}
+    \item Used for precise phase measurements
+    \item Implemented in FPGA and SoftPLL
+    \item 62.5MHz WR clock and N=14 results in 3.814kHz output signals
+  \end{itemize}
+  \vspace{-0.2cm}
+  \begin{center}
+  \includegraphics[width=\textwidth]{misc/dmtd_2N.pdf}
+  \end{center}
+
+\end{frame}
+
+%\begin{frame}{Deglitching algorithm -- to backup slides?}
+%\end{frame}
+
+\begin{frame}{SoftPLL}
+  \begin{center}
+    \includegraphics[width=.9\textwidth]{protocol/dmpll_diagram-slides.pdf}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Link delay model}
+  \begin{center}
+    \includegraphics[width=0.9\textwidth]{calibration/link-model.pdf}
+  \end{center}
+  \begin{itemize}
+    \item static hardware delays: $\Delta_{TXM}$, $\Delta_{RXM}$, $\Delta_{TXS}$, $\Delta_{RXS}$
+    \item semi-static hardware delays: $\epsilon_M$, $\epsilon_S$
+    \item fiber asymmetry coefficient: $\alpha = \frac{\delta_{MS} - \delta_{SM}}{\delta_{SM}}$
+  \end{itemize}
+  \pause
+  \begin{block}{}
+    Calibration procedure to find $\Delta_{TXM}$, $\Delta_{RXM}$,
+    $\Delta_{TXS}$, $\Delta_{RXS}$ and $\alpha$.
+  \end{block}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\section{Equipment}
+\subsection{}
+
+\begin{frame}{Typical WR network}
+  \begin{center}
+		\includegraphics[width=.5\textwidth]{network/wr_network-enhanced_pro.pdf}
+  \end{center}
+\end{frame}
+
+\begin{frame}[t,fragile]{White Rabbit Switch}
+	\begin{center}
+		\includegraphics[width=\textwidth]{switch/wrSwitch_v3_3.jpg}
+		\begin{itemize}
+			\item Central element of WR network
+			\item 18 port gigabit Ethernet switch with WR features
+			\item Optical transceivers: up to 10km, single-mode fiber
+      \item Fully open design, commercially available
+		\end{itemize}
+	\end{center}
+\end{frame}
+
+\begin{frame}{Simplified block diagram of the hardware}
+	\vspace{-0.3cm}
+  \begin{center}
+    \includegraphics[width=.85\textwidth]{switch/switch3_4_simple_diagram_h.pdf}
+  \end{center} 
+\end{frame}
+
+\begin{frame}{Simplified block diagram of the gateware}
+  \begin{center}
+    \begin{adjustwidth}{-1.5em}{-1.5em}
+      \includegraphics[width=1.1\textwidth]{switch/switch_hdl_simple.pdf}
+    \end{adjustwidth}
+  \end{center}
+\end{frame}
+
+
+\begin{frame}{WR Node: SPEC board}
+    \begin{center}
+    \includegraphics[width=7cm]{node/spec.jpg}
+    \end{center}
+
+  \begin{columns}[c]
+    \column{.01\textwidth}
+    \column{.98\textwidth}
+
+	\begin{block}{FMC-based Hardware Kit}
+	  \begin{itemize}
+%	  \item Carrier boards in PCI-Express, VME, PXIe
+	  \item All carrier cards are equipped with a White Rabbit port.
+	  \item Mezzanines can use the accurate clock signal and ``TAI''
+		\\ (synchronous sampling clock, trigger time tag, ...).
+	  \end{itemize}
+	\end{block}
+
+    \column{.01\textwidth}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{White Rabbit PTP Core}
+ \begin{center}
+   \includegraphics[width=\textwidth]{node/wrpc_inside-v3-0.pdf}
+   \end{center}
+\end{frame}
+
+
+\section{Performance}
+\subsection{}
+\begin{frame}{WR time transfer performance: basic test setup}
+
+    \begin{center}
+    \includegraphics[height=7.0cm]{measurements/meas_setup.pdf}
+    \end{center}
+
+\end{frame}
+
+\begin{frame}{WR time transfer performance: test results}
+
+    \begin{center}
+    \includegraphics[height=6.0cm]{measurements/meas_results2.pdf}
+    \end{center}
+
+\end{frame}
+
+\begin{frame}{WR Switch: low jitter daughterboard}
+  \begin{columns}
+    \column{.35\textwidth}
+    \includegraphics[width=.8\textheight, angle=90]{measurements/WRSlowJitter/rsz_3d_image__1_.jpg}
+    \column{.65\textwidth}
+    \begin{itemize}
+      \item Current release of WRS in GM mode has suboptimal performance on both jitter (9ps RMS 1Hz-100kHz) and ADEV (1.4E-11 $\tau$=1s ENBW 50Hz)
+      \item A daughterboard was designed, produced and tested to improve the performance
+      \item Modified WRS improves performance on both jitter ($<$2ps RMS 10Hz-100kHz) and ADEV ($<$5E-13 $\tau$=1s ENBW 50Hz) in GM mode
+    \end{itemize}
+  \end{columns}
+\end{frame}
+
+\begin{frame}{Daughterboard Test Setup}
+  \begin{center}
+    \includegraphics[width=\textwidth]{measurements/WRSlowJitter/rsz_experimental_setup.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Test Results in GM mode: PM noise}
+  \begin{center}
+    \includegraphics[height=.85\textheight]{measurements/WRSlowJitter/pn.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Test Results in GM mode: Modified ADEV}
+  \begin{center}
+    \includegraphics[height=.85\textheight]{measurements/WRSlowJitter/mdev.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Test Results in Slave mode: PM noise}
+  \begin{center}
+    \includegraphics[height=.85\textheight]{measurements/WRSlowJitter/slave_pn.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{Test Results in Slave mode: Modified ADEV}
+  \begin{center}
+    \includegraphics[height=.85\textheight]{measurements/WRSlowJitter/slave_mdev.png}
+  \end{center}
+\end{frame}
+
+\section{Current developments}
+\subsection{}
+
+\begin{frame}{Current developments}
+  \begin{block}{Switches and nodes are commercially available}
+  Work now revolves around better diagnostics and remote management of WR
+  networks as well as improving the phase noise and performing extensive network stress tests.
+  \end{block}
+  \pause
+  \begin{block}{Standardization}
+    IEEE 1588 revision process is ongoing and contains a sub-committee (High
+    Accuracy) dedicated to White Rabbit. Revised standard expected in mid-2018.
+  \end{block}
+  \pause
+  \begin{block}{Robustness}
+  Based on redundant information and fast switch-over between
+  redundant fibers and switches. 
+  \end{block}
+\end{frame}
+
+\begin{frame}{Ethernet Clock distribution a.k.a. Distributed DDS}
+  \begin{center}
+    \includegraphics[width=\columnwidth]{applications/remote_dds.pdf}
+  \end{center}
+  \begin{block}{Distributed Direct Digital Synthesis}
+    \begin{itemize}
+    \item Replaces dozens of cables with a single fiber.
+    \item Works over big distances without degrading signal quality.
+    \item Can provide various clocks (RF of many rings and linacs)
+      with a single, standard link.
+    \end{itemize}
+  \end{block}
+\end{frame}
+
+\begin{frame}{Distributed oscilloscope}
+ \begin{center}
+   \includegraphics[width=0.9\textwidth]{applications/distr_oscill.pdf}
+   \end{center}
+   \begin{block}{}
+     \begin{itemize}
+     \item Common clock in entire network: no skew between ADCs.
+     \item Ability to sample with different clocks via Distributed DDS.
+     \item External triggers can be time tagged with a TDC and used to reconstruct the original time base in the operator's 
+PC.
+     \end{itemize}
+   \end{block}
+\end{frame}
+
+\section{Conclusions}
+\subsection{}
+
+\begin{frame}{Summary}
+  \begin{itemize}
+	  \item Scientific, open (H/W \& S/W), with commercial support
+    \pause
+	  \item More applications than ever expected
+    \pause
+	  \item A versatile solution for general control and data acquisition
+    \pause
+	  \item Standard-compatible and standard-extending
+    \pause
+	  \item Active participation in IEEE1588 revision process
+ \end{itemize}
+% \pause
+%For more information see http://www.ohwr.org/projects/white-rabbit/wiki
+\end{frame}
+
+\begin{frame}{Need more information?}
+  \begin{center}
+    \includegraphics[height=4.0cm]{misc/white_rabbit_end.png}
+  \end{center}
+  
+  \begin{center}
+    http://www.ohwr.org/projects/white-rabbit/wiki
+  \end{center}  
+\end{frame}
+
+\end{document}