\documentclass{report}
\usepackage{amssymb}
\usepackage[dvips]{graphicx}
\usepackage{verbatim}
\begin{document}

\title{Calibration wizards manual}
\author{Anna Bergamaschi}
\date{\today}
\maketitle
\chapter{Installation}
\input{installation.tex}

\chapter{Energy calibration}
%\section{Introduction}
\input{enCal.tex}


\chapter{Angular calibration}
%\section{Introduction}
\input{ancCal.tex}

\end{document}

