% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
% TG226
\begin{circuitikz}
    \draw (3,3) node[mixer, box] (mix) {} ++(1,0);
    \draw (mix.west) node[inputarrow, rotate=0] {} to [short] ++(-1.5,0);
    \draw (mix.east) to [short] ++( 1.5,0) to node[inputarrow, rotate=0]{} ++ (0,0);
    \draw (mix.south) node[inputarrow, rotate=90] {} to [short] ++(0,-1);
    \draw (1,3.5) node[] {21\,MHz};
    \draw (5,3.5) node[] {?\,MHz};
    \draw (4,2) node[] {31,7\,MHz};
\end{circuitikz}