\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}
\input{repeater}
\begin{document}
 \begin{tikzpicture}[every node/.style={scale=.8}]
  \activeuser{U1}{0,0}{DM3MAT};
  \activerepeater{R1}{3,1}{DL0LDS};
  \user{U2}{6,0}{DL2XYZ};
  \path[->] (U1) edge node[above,rotate=17] {$431.9625 MHz$} (R1) ;
  \path[->] (R1) edge node[above,rotate=-17] {$439.5625 MHz$} (U2);
 \end{tikzpicture}
\end{document}
