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White Rabbit
Commit fdf74e3e authored by Javier Serrano's avatar Javier Serrano
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presentations/WR_BE-CEM-TM_2021_03/wr_be-cem-tm_2021_03.tex
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......@@ -126,7 +126,7 @@
{\tiny Courtesy Greg Kruk}
\end{frame}
\begin{frame}{Beam Coordination Diagram}
\begin{frame}{Beam Coordination Diagram (BCD)}
\begin{center}
\includegraphics[width=\textwidth]{gmt/bcd.pdf}
......@@ -162,9 +162,9 @@
\begin{itemize}
\item GMT uses PPS and 10 MHz from a GPS Disciplined Oscillator (GPSDO). BST
uses Revolution Frequency and Bunch Clock.
\item GMT is RS-485 copper for short distances and fibre for long stretches.
BST is fully based on fibre and uses an encoding/decoding scheme designed
for LHC experiments called TTC.
\item GMT uses Manchester encoding over copper (RS-485) for short distances
and fibre for long stretches. BST is fully based on fibre and uses an
encoding/decoding scheme designed for LHC experiments called TTC.
\end{itemize}
\end{frame}
......@@ -272,12 +272,13 @@
\item offset from master: $OFM = t_{2} - (t_{1} + \delta_{ms})$
\end{itemize}
\item<2-> Hierarchical network
\item<3-> Shortcomings:
\item<3-> Shortcomings of traditional PTP:
\begin{itemize}
\item devices have free-running oscillators
\item frequency drift compensation vs. message exchange traffic
\item frequency drift compensation traffic can compromise determinism of
other messages
\item assumes symmetry of medium
\item timestamps resolution
\item resolution of timestamps
\end{itemize}
\end{itemize}
\end{columns}
......@@ -332,7 +333,7 @@
\column{.65\textwidth}
\footnotesize
\begin{itemize}
\item <1->Correction of RTT for asymmetries
\item <1->Correction of Round Trip Time (RTT) for asymmetries
\item <2->Asymmetry sources: FPGA, PCB, SFP electrics/optics, chromatic dispersion
\item <3->Link delay model:
\begin{itemize}\scriptsize
......@@ -372,7 +373,7 @@
\begin{itemize}\small
\item Central element of WR network
\item 18 port gigabit Ethernet switch with WR features
\item Default Optical transceivers: up to 10km, single-mode fiber
\item Default Optical transceivers: up to 10km, single-mode fibre
\item Fully open, commercially available from 4 companies
\end{itemize}
......@@ -441,7 +442,7 @@
v4.2: 20-24@1\&10 Gbps or\\\vspace{-0.1cm}
\textcolor{white}{v4.2: 20-}20@1Gbps \& 2-4 @10Gbps
\scriptsize
\item Interfaces aligned with industry trends \& users’ needs\\
\item Interfaces aligned with industry trends \& user needs\\
\tiny
USB C, mgmt RJ45 \& SFP, reset, 10MHz/1PPS in/out+Abscal out, LCD
\scriptsize
......@@ -675,7 +676,7 @@ ISPCS keynote \textit{Highly Accurate Time Dissemination \& Network Synchronisat
\begin{center}
\pause\small
WRTD (White Rabbit Trigger Distribution) to replace the trigger system in
the Open Analog Signals Information System (OASIS)
the Open Analogue Signals Information System (OASIS)
\end{center}
\end{frame}
......@@ -695,7 +696,7 @@ ISPCS keynote \textit{Highly Accurate Time Dissemination \& Network Synchronisat
\begin{frame}{Fixed-latency data transfer- example application}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{center}
Distribution of magnetic field in CERN accelerators
BTrain: distribution of magnetic field in CERN synchrotrons
\end{center}
\begin{center}\vspace{-0.2cm}
......@@ -727,7 +728,7 @@ Distribution of magnetic field in CERN accelerators
\begin{itemize}\footnotesize
\item RF over WR at European Synchrotron Radiation Facility (ESRF)
\begin{itemize}\scriptsize
\item Complete WR-based beam-synchronous timing system in operation: $<$10 ps jitter
\item Complete WR-based beam-synchronous timing system in operation: \\$<$10 ps jitter
\end{itemize}
\item RF over WR at CERN
\begin{itemize}\scriptsize
......@@ -755,7 +756,7 @@ Distribution of magnetic field in CERN accelerators
\end{block}
\end{frame}
\begin{frame}{The White Rabbit ecosystem 1/2}
\begin{frame}{The White Rabbit ecosystem 2/2}
\begin{block}{Challenges ahead}
\begin{itemize}
\item How to maintain a healthy ever-expanding open core? The issue with
......@@ -777,11 +778,11 @@ Distribution of magnetic field in CERN accelerators
\begin{itemize}
\item<1-> Sub-ns accuracy and sub-10~ps precision out-of-the-box
\item<2-> Sub-10~ps accuracy and sub-100~fs precision achievable
\item<3-> Completely open source
\item<3-> Completely open source, very versatile
\item<4-> Commercially available off-the-shelf
\item<5-> Standard-based and standard extending
\item<6-> Included in the revised IEEE1588
\item<7-> Showcase of technology transfer
\item<7-> Showcase of knowledge and technology transfer
% \item<8-> A versatile solution for general control and data acquisition
% \item<1-> Sub-ns accuracy and sub-10ps precision out-of-the-box
......@@ -803,7 +804,8 @@ Distribution of magnetic field in CERN accelerators
%\vspace{1cm}
\begin{center}\scriptsize
WR Project page: http://www.ohwr.org/projects/white-rabbit/wiki
WR Project page:
\href{http://www.ohwr.org/projects/white-rabbit/wiki}{http://www.ohwr.org/projects/white-rabbit/wiki}
\end{center}
\end{frame}
......
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