levelscheme.tex

\documentclass[a4paper,10pt]{article}

\usepackage{tikz,pgflibraryshapes}
\usetikzlibrary{calc}
\usepackage[psfixbb,graphics,tightpage,active]{preview}

\PreviewEnvironment{tikzpicture}

\newcommand\shorteq{%
 \rule[.4ex]{4pt}{0.4pt}\llap{\rule[.7ex]{4pt}{0.4pt}}}
\newcommand\MHz{%
  M\hskip-0.4ptHz}


\begin{document}
\begin{tikzpicture}[x=0.5cm,y=0.004cm,font=\sffamily]
  \scriptsize
  \draw (0, 6200) -- +(1, 0) node[above=-2pt,pos=0.1]{$\omega_{\hskip-0.5pt{}c}$\shorteq\,6200};
    \draw (1, 6200) -- (1.3, 6235);
    \draw (1.3, 6235) -- + (1, 0) node[above=-1pt,pos=0.95]{6235\,\MHz};;
  \draw (0, 6000) -- +(1, 0) node[above=-2pt,pos=0.1]{$\omega_{\hskip-0.5pt{}1}$\shorteq\,6000};
    \draw (1, 6000) -- (1.3, 5982);
    \draw (1.3, 5982) -- + (1, 0) node[above=-1pt,pos=0.95]{5982\,\MHz};
  \draw (0, 5900) -- +(1, 0) node[above=-2pt,pos=0.1]{$\omega_{\hskip-0.5pt{}2}$\shorteq\,5900};
    \draw (1, 5900) -- (1.3, 5882);
    \draw (1.3, 5882) -- + (1, 0) node[above=-1pt,pos=0.95]{5882\,\MHz};
\end{tikzpicture}
\end{document}