\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}
\input{repeater}
\begin{document}
  \begin{tikzpicture}[every node/.style={scale=.8}]
   \activeuser{u1}{ 0,0}{DM3MAT};
   \user{u2}{ 6,2}{DL1XYZ, TG99};
   \user{u3}{ 6,0}{DL2XYZ, TG99};
   \user{u4}{ 6,-2}{DL3XYZ};
   \path[->] (u1) edge[bend left] node[above, rotate=10]{$433.450 MHz$} node[below, rotate=10]{GC: TG99} (u2);
   \path[->] (u1) edge node[above]{$433.450 MHz$} node[below]{GC: TG99} (u3);
  \end{tikzpicture}
\end{document}
