Some modifications after discussing with Dimitris and Enrico

presentations/WR_Javier_EFTS_2018/wr_efts_2018.tex

@@ -139,8 +139,8 @@
       \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}
+      \item \color{Blue}{Sub-ns synchronisation}
+      \item \color{Red}{Guaranteed (by design) upper bound in frame latency}
   \end{itemize}
 
   \column{.6\textwidth}
@@ -190,67 +190,31 @@
 \begin{frame}{White Rabbit technology}
   \begin{block}{Based on}
     \begin{itemize}
-      \item Gigabit Ethernet over fiber
+      \item Gigabit Ethernet over fibre
       \item IEEE-1588 protocol
     \end{itemize}
   \end{block}
   \pause
   \begin{block}{Enhanced with}
     \begin{itemize}
-      \item Layer 1 syntonization
+      \item Layer 1 syntonisation
       \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 Gigabit Ethernet over fibre
       \item IEEE-1588 protocol
     \end{itemize}
   \end{block}
   \begin{block}{Enhanced with}
     \begin{itemize}
-      \item Layer 1 syntonization
+      \item Layer 1 syntonisation
       \item Digital Dual Mixer Time Difference (DDMTD)
       \item Link delay model
     \end{itemize}
@@ -265,7 +229,7 @@
     \end{center}
   \column{.75\textwidth}
     \begin{itemize}
-	  \item Frame-based synchronization protocol.
+	  \item Frame-based synchronisation protocol.
     \item Simple calculations:
     \begin{itemize}
       \item link $delay_{ms}$ $\delta_{ms} = \frac{(t_{4}-t_{1}) - (t_{3}-t_{2})}{2}$
@@ -281,7 +245,7 @@
 \end{columns}
 \end{frame}
 
-\begin{frame}{Layer 1 Syntonization}
+\begin{frame}{Layer 1 Syntonisation}
  %\begin{block}{Common clock for the entire network}
   \begin{itemize}
     \item All network devices use the same physical layer clock.
@@ -309,15 +273,6 @@
 
 \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}
@@ -325,7 +280,7 @@
   \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: $\alpha = \frac{\delta_{MS} - \delta_{SM}}{\delta_{SM}}$
+    \item fibre asymmetry coefficient: $\alpha = \frac{\delta_{MS} - \delta_{SM}}{\delta_{SM}}$
   \end{itemize}
   \pause
   \begin{block}{}
@@ -420,25 +375,61 @@
 
 \end{frame}
 
+\frame{\frametitle{An aside: PLL block diagram}
+\includegraphics[width=\textwidth]{misc/pll_model.pdf}
+}
+
+\frame{\frametitle{An aside: PLL transfer functions}
+\begin{block}{Total output phase spectrum}
+$ \Phi_o(s) = H(s) \cdot \Phi_i(s) + E(s) \cdot \Phi_n(s) $
+\end{block}
+
+\begin{block}{System transfer function (low pass)}
+$ H(s) = \frac{K_{VCO} K_d F(s)}{s + K_{VCO} K_d F(s)} $
+\end{block}
+
+\begin{block}{Error transfer function (high pass)}
+$ E(s) = 1 - H(s) = \frac{s}{s + K_{VCO} K_d F(s)} $
+\end{block}
+}
+
+\frame{\frametitle{An aside: jitter optimisation}
+\includegraphics[height=0.7\textwidth]{misc/pll_psd.pdf}
+}
+
+
+\begin{frame}{Test setup for 10MHz switch output}
+  \begin{center}
+    \includegraphics[width=\textwidth]{measurements/WRSlowJitter/rsz_experimental_setup.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{WR switch clocking scheme}{Thanks to Mattia Rizzi for the work and
+  the figures in this section}
+  \begin{center}
+    \includegraphics[width=.85\textwidth]{switch/wrs_v3_3_clocking.png}
+  \end{center}
+\end{frame}
+
+\begin{frame}{MMCM noise}
+  \begin{center}
+    \includegraphics[height=.7\textheight]{switch/mmcm_noise.png}
+  \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 Current release of WRS in GM mode has sub-optimal 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}
@@ -451,17 +442,6 @@
   \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{}
@@ -472,14 +452,14 @@
   networks as well as improving the phase noise and performing extensive network stress tests.
   \end{block}
   \pause
-  \begin{block}{Standardization}
+  \begin{block}{Standardisation}
     IEEE 1588 revision process is ongoing and contains a sub-committee (High
     Accuracy) dedicated to White Rabbit. Revised standard expected in 2019.
   \end{block}
   \pause
   \begin{block}{Robustness}
   Based on redundant information and fast switch-over between
-  redundant fibers and switches. 
+  redundant fibres and switches. 
   \end{block}
 \end{frame}