% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2024
\begin{tikzpicture}
    % Achse
    \draw[-Triangle] (-0.3,0) -- (8.0,0) node[right] {$f$};
    \draw[-Triangle] (0,-0.2) -- (0,2.0) node[above] {$U$};

    % Frequenzpositionen
    \def\fc{4}
    \def\fm{1}

    % Seitenbänder
    \draw[very thick, DARCblue] ({\fc-\fm},0) -- ({\fc-\fm},1.2);
    \draw[very thick, DARCblue] ({\fc+\fm},0) -- ({\fc+\fm},1.2);

    % Unterdrückter Träger gestrichelt
    \draw[very thick, DARCred] (\fc,0) -- (\fc,1.8);

    % Beschriftungen
    \node[below] at ({\fc-\fm},0) {$\unit{\ohm}-\omega$};
    \node[below] at (\fc,0) {$\unit{\ohm}$};
    \node[below] at ({\fc+\fm},0) {$\unit{\ohm}+\omega$};

    \node[above] at ({\fc-\fm},1.2) {LSB};
    \node[above] at ({\fc+\fm},1.2) {USB};
    \node[above] at (\fc,1.8) {Träger};
\end{tikzpicture}