diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch2.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch2.pdf
new file mode 100644
index 0000000..96a976f
Binary files /dev/null and b/figures/grand/split-cable/split-cable-delays-ch1ch2.pdf differ
diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch3.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch3.pdf
new file mode 100644
index 0000000..f96c03a
Binary files /dev/null and b/figures/grand/split-cable/split-cable-delays-ch1ch3.pdf differ
diff --git a/figures/grand/split-cable/split-cable-delays-ch1ch4.pdf b/figures/grand/split-cable/split-cable-delays-ch1ch4.pdf
new file mode 100644
index 0000000..8b618d7
Binary files /dev/null and b/figures/grand/split-cable/split-cable-delays-ch1ch4.pdf differ
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..d003b6e
--- /dev/null
+++ b/presentations/2022-05-31_group_meeting/2022-05-31_group_meeting.tex
@@ -0,0 +1,104 @@
+\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}
+		\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{block}{Grand DU before ADC}
+		\begin{itemize}
+			\item Four channel ADC
+			\item Per-channel Filterchain (might introduce delays)
+		\end{itemize}
+	\end{block}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{grand/antenna-to-adc.pdf}
+		\caption{
+			Antenna to the four-channel ADC
+		}
+	\end{figure}
+\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}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{grand/channel-delay-setup.pdf}
+		\caption{
+			Single input to two channels
+		}
+	\end{figure}
+	\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{block}
+\end{frame}
+
+\begin{frame}{Channel Delays Result}
+	\begin{figure}
+		\includegraphics[width=\textwidth]{grand/split-cable-delays/split-cable-delays-ch1ch4.pdf}
+	\end{figure}
+\end{figure}
+
+%%%%%%%%%%%%%
+\section*{References}
+\begin{frame}{References}
+		\printbibliography
+\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