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Merge branch '2022-05-31_group_meeting' into main

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Eric Teunis de Boone 2022-07-11 18:47:41 +02:00
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2
figures/grand/setup/.gitignore vendored Normal file
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*.pdf
*.pdf_tex

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figures/grand/setup/Makefile Normal file
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# vim:ft=make
.PHONY: all clean
SRCDIR = $(shell pwd)/src
OUTPUTDIR = $(shell pwd)
VPATH = $(SRCDIR)
SOURCES := $(patsubst ,$(SRCDIR),$(wildcard $(SRCDIR)/*.svg))
OBJECTS := $(patsubst %.svg,%.pdf,$(SOURCES))
### Targets
all: $(OBJECTS)
%.pdf: %.svg
inkscape --export-area-drawing --export-pdf="${@F}" "$^"
%.pdf_tex: %.svg
inkscape --export-area-drawing --export-latex --export-pdf="${@F}" "$^"
clean:
@rm -vf *.pdf *.pdf_tex

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\documentclass[showdate=false]{beamer}
\usepackage[british]{babel}
\usepackage{amsmath}
\usepackage{hyperref}
\usepackage[backend=bibtex,style=trad-plain]{biblatex}
\usepackage{graphicx}
\graphicspath{{.}{../../figures/}}
\addbibresource{../../../bibliotheca/bibliography.bib}
% Disable Captions
\setbeamertemplate{caption}{\raggedright\small\insertcaption\par}
% Show Section overview at beginning of section
%\AtBeginSection[]
%{
% \begin{frame}<beamer>{Table of Contents}
% \tableofcontents[currentsection, currentsubsection, sectionstyle=show/shaded, subsectionstyle=hide]
% \end{frame}
%}
% no to navigation, yes to frame numbering
\beamertemplatenavigationsymbolsempty
\setbeamerfont{page number in head/foot}{size=\normalsize}
\setbeamertemplate{footline}[frame number]
\title[Grand DU]{Channel delays in the Grand Digitizer}
\date{May 31, 2022}
\author{E.T. de Boone}
\begin{document}
\frame{\titlepage}
\begin{frame}{Wireless time distribution}
\begin{block}{Current Timing Methods}
\begin{itemize}
\item GNSS (online)
\item Beacon (online/offline)
\end{itemize}
\end{block}
\vspace{2em}
\begin{itemize}
\item GPS Accuracy $\leq 30 \mathrm{ns}$ for $95$\% time (often better)
\item Total time accuracy in the order of 5 -- 10~ns
\end{itemize}
\vspace{2em}
\begin{alertblock}{Grand Digitizer Unit}
\begin{itemize}
\item Both GNSS and Beacon,
\item Maybe test GNSS with Beacon?
\end{itemize}
\end{alertblock}
\end{frame}
\section{Channel Delays in the GRAND DU}
\begin{frame}{Grand DU before ADC}
\begin{columns}
\begin{column}{0.5\textwidth}
\begin{block}{GRAND Digitizer Unit}
\begin{itemize}
\item Four channel ADC
\item Per-channel Filterchain (might introduce delays)
\end{itemize}
\end{block}
\end{column}
\begin{column}{0.5\textwidth}
\begin{figure}
\includegraphics[width=1\textwidth]{grand/setup/antenna-to-adc.pdf}
\caption{
Antennae to the four-channel ADC
}
\end{figure}
\end{column}
\end{columns}
\end{frame}
\begin{frame}{Channel Delays Setup}
\begin{block}{Channel Delay Setup}
Single input into two channels
$\mapsto$ delays due to cabling and filterchain
\\
Use correlation or phase differences to determine delay
\end{block}
\only<1>{\begin{figure}
\includegraphics[width=0.8\textwidth]{grand/setup/channel-delay-setup.pdf}
\caption{Single input to two channels}
\end{figure}}
\only<2>{\begin{block}{What signal to put in?}
\begin{itemize}
\item Sine $\mapsto$ single frequency response of chain
\item Pulse $\mapsto$ multiple frequencies to compare
\end{itemize}
\end{block}}
\end{frame}
\begin{frame}{Channel Delays Result I: Sine}
\begin{block}{Sine ch1 ch2}
Length difference: $1.16m \sim 4ns$ delay
\\
@50MHz: delay(ch1, ch2) = $46\mathrm{ps} \pm 10$
\end{block}
\begin{figure}
\includegraphics[width=\textwidth]{grand/split-cable/split-cable-delay-ch1ch2-50mhz-200mVpp.pdf}
%\caption{"@50MHz:
%$5.643614156919462 \pm 0.010333456331688352$,
%$-5.598005556921079 \pm 0.012115559927114126$
% }
\end{figure}
\end{frame}
\begin{frame}{Channel Delays Result II: Pulse}
\begin{block}{Pulse ch1 ch2}
Length difference: $1.16m \sim 4ns$ delay
\end{block}
\begin{figure}
\includegraphics[width=\textwidth]{grand/split-cable/split-cable-delays-ch1ch4.pdf}
\end{figure}
\end{frame}
%%%%%%%%%%%%%
\end{document}

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# vim:ft=make
-include config.mk
.PHONY: all clean dist-clean
### Variables
MAIN_SRC ?= main.tex
TEXENGINE ?= latexmk --pdf
MAIN_TARGET = $(patsubst %.tex,%.pdf,$(MAIN_SRC))
### Targets
all: $(MAIN_TARGET)
dist: all clean
$(MAIN_TARGET): $(MAIN_SRC)
$(TEXENGINE) $^
dist-clean: clean
@rm -vf *.pdf *.eps *.dvi *.ps
clean:
@rm -vf *.dat *.log *.out *.aux *.nav *.snm *.toc *.vrb *~ *.fls *.fdb_latexmk *-blx.bib *.bbl *.blg *.run.xml

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# Short Presentation on current status
Mostly to show what I've been doing uptil now.
Add short description of experimental setup?
### Outline
* Timing Mechanisms (GNSS, Beacon)
* White Rabbit as reference timing mechanism
* White Rabbit
* PTP
* Fourier and Phase information
* precise measurement $N_{sample} = N_{required}$
* imprecise measurement $N_{sample} != N_{required}$

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MAIN_SRC=2022-05-31_group_meeting.tex