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White Rabbit
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3dae565c
Commit
3dae565c
authored
Jun 20, 2019
by
Maciej Lipinski
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[WIP] Sent to Javier
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2d9ecce5
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48 additions
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19 deletions
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-19
PBowen-link-errors.jpg
figures/measurements/PBowen-link-errors.jpg
+0
-0
wrs_v3_3_clocking_with_bandwidth.png
figures/switch/wrs_v3_3_clocking_with_bandwidth.png
+0
-0
wr_efts_2019.tex
presentations/WR_Maciej_EFTS_2019/wr_efts_2019.tex
+48
-19
No files found.
figures/measurements/PBowen-link-errors.jpg
0 → 100644
View file @
3dae565c
136 KB
figures/switch/wrs_v3_3_clocking_with_bandwidth.png
0 → 100644
View file @
3dae565c
286 KB
presentations/WR_Maciej_EFTS_2019/wr_efts_2019.tex
View file @
3dae565c
...
...
@@ -418,25 +418,25 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
% \includegraphics<4->[height=2.3cm]{misc/inaccuracy-sources-fixed-delays.jpg}
% \end{center}
\begin{columns}
[c]
\column
{
0.6
\textwidth
}
\vspace
{
-0.5cm
}
\column
{
0.6
5
\textwidth
}
\vspace
{
-0.5cm
}
\begin{itemize}
\scriptsize
\item
<1->
\textbf
{
Bitslide
}
-- measurement uncertainty
\begin{itemize}
\scriptsize
\item
Measured each time link goes up
\item
Value provided by GTX of FPGA
\item
Error:
$
\pm
$
25ps [7]
\item
Error:
$
\pm
$
35ps for GTX
\item
Remedy: ensure bitslide is zero
\\
(ongoing work at CERN)
\end{itemize}
\item
<2->
\textbf
{
PCB, FPGA, SFP
}
-- hardware delay uncertainty
\begin{itemize}
\scriptsize
\item
Calibration uncertiainty: sdev of 2ps [7]
\item
Linear dependency on temp (700ps over
$
-
10
..
55
^
oC
$
):
\item
Linear dependency on temp
erature
\\
(700ps over
$
-
10
..
55
^
oC
$
):
\begin{itemize}
\tiny
\item
CuteWR: tx
$
-
8
.
4
ps
/
K
$
, rx
$
13
.
3
ps
/
K
$
[6]
\item
Switch: 8ps/K [7]
\item
WR-Zen: 4ps/K [7]
\end{itemize}
\item
Remedy: active compensation
\\
(
implemented
for LHASSO, 50ps over
$
-
10
..
55
^
oC
$
[6])
\item
Remedy: active compensation
\\
(for LHASSO, 50ps over
$
-
10
..
55
^
oC
$
[6])
% \item SFP delay dependency on input power, error up to 30ps [2]
\end{itemize}
\end{itemize}
...
...
@@ -469,7 +469,7 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\begin{itemize}
\scriptsize
\item
<1->
\textbf
{
SFP
}
-- tx wavelength uncertainty
\begin{itemize}
\scriptsize
\item
<2->
Allowed departure from nominal value
\\
(10nm at 1490nm, 50nm at 1310nm [7]
)
\item
<2->
IEEE802.3ah allows nominal value departures
\\
(10nm at 1490nm, 50nm at 1310nm
)
\item
<3-> Linear dependency on SFP temp:
\begin{itemize}
\tiny
\item
SFP@1310nm:
$
0
.
11
ps
/(
K
\cdot
km
)
$
[6]
...
...
@@ -486,15 +486,17 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\item
G652.D at 1490/1550:
$
-
0
.
05
ps
/(
K
\cdot
km
)
$
[7]
\end{itemize}
\end{itemize}
\item
<5-> Significant for links
$
>
10
km
$
\item
<5-> Significant for links
$
>
10
km
$
[7]
\item
<6-> Remedy: temp-stabilized SFP, closer wavelength
\\
(CH21
\&
CH23 @ 1560.61
\&
1558.98 in SKA [7])
\end{itemize}
\column
{
0.45
\textwidth
}
\begin{center}
\vspace
{
-0.5cm
}
\includegraphics
<3>[width=0.6
\textwidth
]
{
measurements/sfp-temp-dependence.jpg
}
\includegraphics
<4-5>[width=
\textwidth
]
{
measurements/fiber-temp-dependency.jpg
}
\includegraphics
<6>[width=
\textwidth
]
{
applications/SKA-DWDM.jpg
}
\includegraphics
<4>[width=
\textwidth
]
{
measurements/fiber-temp-dependency.jpg
}
% \includegraphics<5->[width=\textwidth]{applications/SKA-DWDM.jpg}
\includegraphics
<5->[width=
\textwidth
]
{
measurements/PBowen-link-errors.jpg
}
% \tiny\pause\pause\pause
% Figure source: [1]
\end{center}
...
...
@@ -522,7 +524,8 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\begin{itemize}
\scriptsize
\item
Flicker PM noise: -100 dBc at 1 Hz
\begin{itemize}
\tiny
\item
$
<
$
10Hz, limits MDEV at
$
\tau
=
1
s
$
to 4E-13
\item
Dominant
$
<
$
10Hz,
\item
MDEV at
$
\tau
=
1
s
$
to 4E-13
\item
LVDS input clock buffer and clock routing
\end{itemize}
\item
White PM noise: -108 dBc
...
...
@@ -543,8 +546,9 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\includegraphics
<1>[width=.99
\textwidth
]
{
measurements/DDMTD-noise.jpg
}
\includegraphics
<2>[width=.99
\textwidth
]
{
measurements/DDMTD-future-tech-noise.jpg
}
\end{center}
\end{columns}
\end{columns}
\vspace
{
0.5cm
}
\begin{center}
\tiny
NOTE: Carrier is 10MHz
\\
\tiny
All above data is based on [13]
\end{center}
\end{frame}
...
...
@@ -646,13 +650,13 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\begin{itemize}
\scriptsize
\item
Jitter improvement [13, 15]
\begin{itemize}
\scriptsize
\item
GM: 9ps to
$
<
$
2ps RMS 10
Hz-100kHz
\item
BC:
\item
GM: 9ps to
1ps RMS 1
Hz-100kHz
\item
BC:
11ps to
$
<
2
$
ps RMS 1Hz-100kHz
\end{itemize}
\item
A
DEV improvement [13, 15]
\item
M
DEV improvement [13, 15]
\begin{itemize}
\scriptsize
\item
GM:
1.4E-11
to
$
<
$
5E-13
$
\tau
$
=1s ENBW 50Hz
\item
BC:
\item
GM:
2E-12
to
$
<
$
5E-13
$
\tau
$
=1s ENBW 50Hz
\item
BC:
4E-12 to
$
<
$
7E-13
$
\tau
$
=1s ENBW 50Hz
\end{itemize}
\end{itemize}
...
...
@@ -666,8 +670,8 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\begin{itemize}
\small
\item
<1-> Standardization in IEEE 1588:
\begin{itemize}
\scriptsize
\item
High Accuracy sub-committee
in
dedicated to WR
\item
WR to become Default High Accuracy
Profile
\item
High Accuracy sub-committee dedicated to WR
\item
High Accuracy, a.k.a. WR, to become a third Default PTP
Profile
\item
Revised standard expected in 2019.
\end{itemize}
\item
<2-> Long-haul link
...
...
@@ -751,13 +755,17 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
%For more information see http://www.ohwr.org/projects/white-rabbit/wiki
\end{frame}
\begin{frame}
{
Need more information?
}
\begin{frame}
{
QA
}
\begin{center}
\includegraphics
[height=4.0cm]
{
misc/white
_
rabbit
_
end.png
}
\end{center}
\begin{center}
http://www.ohwr.org/projects/white-rabbit/wiki
Thank you for attention!
\\
Any questions?
\end{center}
\vspace
{
1cm
}
\begin{center}
\scriptsize
WR Project page: http://www.ohwr.org/projects/white-rabbit/wiki
\end{center}
\end{frame}
...
...
@@ -784,6 +792,27 @@ INRIM & Italy & 70~km & 610ps $\pm$47ps\\ \hline
\end{enumerate}
\end{frame}
\begin{frame}
{
References
}
\begin{center}
Backup slides
\end{center}
\end{frame}
\begin{frame}
{
GM Switch with LJD: PM noise and Modfied ADEV
}
\begin{center}
\includegraphics
[width=.5\textwidth]
{
measurements/WRSlowJitter/pn.png
}
\includegraphics
[width=.5\textwidth]
{
measurements/WRSlowJitter/mdev.png
}
\end{center}
\end{frame}
\begin{frame}
{
BC Switch with LJD: PM noise and Modfied ADEV
}
\begin{center}
\includegraphics
[width=.5\textwidth]
{
measurements/WRSlowJitter/slave
_
pn.png
}
\includegraphics
[width=.5\textwidth]
{
measurements/WRSlowJitter/slave
_
mdev.png
}
\end{center}
\end{frame}
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \subsection{}
% \begin{frame}{Performance Enhancements}
...
...
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