% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2026
\begin{tikzpicture}
    % Achsen
    \draw[-Triangle](0,0) -- ++(0,1.25) node[anchor=south] {$Q$};
    \draw[-Triangle](0,0) -- ++(1.4,0) node[anchor=west] {$I$};
    \draw(0,0) -- ++(-1.25,0);
    \draw(0,0) -- ++(0,-1.25);

    % Amplituden
    \draw[gray](0,0) circle (0.5);
    \draw[gray](0,0) circle (1.0);

    % Symbolpunkte
    \draw(0.5,0) node[anchor=center, circle, draw, fill=DARCblue](m0){};
    \draw(1.0,0) node[anchor=center, circle, draw, fill=DARCblue](m1){};

    % Bit-Zuordnung
    \draw(m0.south) node[anchor=north] {$0$};
    \draw(m1.south) node[anchor=north] {$1$};
\end{tikzpicture}