diff --git a/figures/grand/setup/.gitignore b/figures/grand/setup/.gitignore
new file mode 100644
index 0000000..2eba467
--- /dev/null
+++ b/figures/grand/setup/.gitignore
@@ -0,0 +1,2 @@
+*.pdf
+*.pdf_tex
diff --git a/figures/grand/setup/Makefile b/figures/grand/setup/Makefile
new file mode 100644
index 0000000..91bce5c
--- /dev/null
+++ b/figures/grand/setup/Makefile
@@ -0,0 +1,23 @@
+# 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
+
diff --git a/figures/grand/setup/src/antenna-to-adc.svg b/figures/grand/setup/src/antenna-to-adc.svg
new file mode 100644
index 0000000..f8d9662
--- /dev/null
+++ b/figures/grand/setup/src/antenna-to-adc.svg
@@ -0,0 +1,250 @@
+
+
\ No newline at end of file
diff --git a/figures/grand/setup/src/channel-delay-setup-inverse.svg b/figures/grand/setup/src/channel-delay-setup-inverse.svg
new file mode 100644
index 0000000..6e28934
--- /dev/null
+++ b/figures/grand/setup/src/channel-delay-setup-inverse.svg
@@ -0,0 +1,120 @@
+
+
diff --git a/figures/grand/setup/src/channel-delay-setup.svg b/figures/grand/setup/src/channel-delay-setup.svg
new file mode 100644
index 0000000..ee71694
--- /dev/null
+++ b/figures/grand/setup/src/channel-delay-setup.svg
@@ -0,0 +1,119 @@
+
+
diff --git a/figures/grand/setup/src/grand-gps-setup.svg b/figures/grand/setup/src/grand-gps-setup.svg
new file mode 100644
index 0000000..e563076
--- /dev/null
+++ b/figures/grand/setup/src/grand-gps-setup.svg
@@ -0,0 +1,293 @@
+
+
+
+
diff --git a/figures/grand/split-cable/split-cable-delay-ch1ch2-50mhz-200mVpp.pdf b/figures/grand/split-cable/split-cable-delay-ch1ch2-50mhz-200mVpp.pdf
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diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch2.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch2.pdf
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diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch3.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch3.pdf
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diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch4.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch4.pdf
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diff --git a/presentations/2022-05-31_group_meeting/2022-05-31_group_meeting.tex b/presentations/2022-05-31_group_meeting/2022-05-31_group_meeting.tex
new file mode 100644
index 0000000..962d622
--- /dev/null
+++ b/presentations/2022-05-31_group_meeting/2022-05-31_group_meeting.tex
@@ -0,0 +1,121 @@
+\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}{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}
diff --git a/presentations/2022-05-31_group_meeting/Makefile b/presentations/2022-05-31_group_meeting/Makefile
new file mode 100644
index 0000000..449c34a
--- /dev/null
+++ b/presentations/2022-05-31_group_meeting/Makefile
@@ -0,0 +1,24 @@
+# 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
diff --git a/presentations/2022-05-31_group_meeting/README.md b/presentations/2022-05-31_group_meeting/README.md
new file mode 100644
index 0000000..63ed19d
--- /dev/null
+++ b/presentations/2022-05-31_group_meeting/README.md
@@ -0,0 +1,16 @@
+# 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 $N_{sample} != N_{required}$
diff --git a/presentations/2022-05-31_group_meeting/config.mk b/presentations/2022-05-31_group_meeting/config.mk
new file mode 100644
index 0000000..f3f1016
--- /dev/null
+++ b/presentations/2022-05-31_group_meeting/config.mk
@@ -0,0 +1 @@
+MAIN_SRC=2022-05-31_group_meeting.tex