Skip to content

W
White Rabbit
Commit 0abd84b7 authored by Dimitris Lampridis's avatar Dimitris Lampridis
Browse files
Options

EFTS2017: final version

parent 07eb2517
Hide whitespace changes
Inline Side-by-side
Showing with 53 additions and 33 deletions
presentations/WR_Dimitris_EFTS_2017/Makefile
View file @ 0abd84b7
......@@ -7,5 +7,5 @@ wr_efts_2017.pdf : wr_efts_2017.tex
pdflatex $^
clean :
rm -f *.eps *.pdf *.dat *.log *.out *.aux *.dvi *.ps *.nav *.snm *.toc
rm -f *.eps *.pdf *.dat *.log *.out *.aux *.dvi *.ps *.nav *.snm *.toc *.vrb
presentations/WR_Dimitris_EFTS_2017/wr_efts_2017.tex
View file @ 0abd84b7
......@@ -420,51 +420,71 @@
\end{frame}
\begin{frame}{WR Switch characteristics: test setup}
\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)
\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) in GM mode
\end{itemize}
\end{columns}
\end{frame}
\begin{frame}{Daughterboard Test Setup}
\begin{center}
\includegraphics[width=.7\textwidth]{measurements/WRclockChar/phaseNoise-setup.pdf}
\pause
\begin{block}{}
These are the latest measurements - first step to improve the jitter and
stability.
\end{block}
\begin{block}{}
{\bf White Rabbit clock characteristics}, \emph{M.Rizzi et al.}\\
ISPCS2016, Stockholm, Sweden, 2016
\end{block}
\includegraphics[width=\textwidth]{measurements/WRSlowJitter/rsz_experimental_setup.png}
\end{center}
\end{frame}
\begin{frame}{Transfer function}
\begin{frame}{Test Results in GM mode: PM noise}
\begin{center}
\includegraphics[width=.7\textwidth]{measurements/transfer_function_v3_4.pdf}
\begin{itemize}
\item 30Hz bandwidth
\item 3.3dB phase gain at 16Hz
\end{itemize}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/pn.png}
\end{center}
\end{frame}
\begin{frame}{Allan deviation}
\begin{frame}{Test Results in GM mode: Modified ADEV}
\begin{center}
%\includegraphics[width=.7\textwidth]{measurements/adev_v3_4.jpg}
\includegraphics[width=.7\textwidth]{measurements/adev_v3_4.pdf}
\begin{itemize}
\item Measurement time: 30 minutes
\item Grandmaster switch $ADEV(\tau = 1s)=1.3\mathrm{e}{-11}$
\end{itemize}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/mdev.png}
\end{center}
\end{frame}
\begin{frame}{Phase noise}
\begin{frame}{Test Results in GM mode: Time deviation}
\begin{center}
\includegraphics[width=.7\textwidth]{measurements/phase_noise_v3_4.pdf}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/tdev.png}
\end{center}
\end{frame}
\begin{frame}{Test Results in GM mode: Time error}
\begin{center}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/phase.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}
\begin{frame}{Test Results in Slave mode: Time deviation}
\begin{center}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/slave_tdev.png}
\end{center}
\end{frame}
\begin{frame}{Test Results in Slave mode: Time error}
\begin{center}
\includegraphics[height=.85\textheight]{measurements/WRSlowJitter/slave_phase.png}
\end{center}
\begin{itemize}
\item VCO noise leaking
\item PLL peaking
\item High frequency spurs
\end{itemize}
\end{frame}
\section{Current developments}
......@@ -473,7 +493,7 @@
\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.
networks as well as improving the phase noise and performing extensive network stress tests.
\end{block}
\pause
\begin{block}{Standardization}
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment