91 lines
2.6 KiB
TeX
91 lines
2.6 KiB
TeX
\begin{tikzpicture}
|
|
|
|
\begin{axis}[
|
|
xmin=0,
|
|
xmax=45,
|
|
ymin=-68,
|
|
ymax=8,
|
|
xlabel={Frequenz in MHz},
|
|
ylabel={Leistung},
|
|
xtick={0,5,10,15,20,25,30,35,40,45},
|
|
ytick={},
|
|
yticklabels={},
|
|
grid=major,
|
|
axis lines=left,
|
|
axis line style={-Triangle},
|
|
clip=false,
|
|
label style={font=\small},
|
|
width=\linewidth,
|
|
height=\linewidth*0.45,
|
|
]
|
|
|
|
% Beispiel:
|
|
% f1 = 10 MHz
|
|
% f2 = 11 MHz
|
|
|
|
% Bereich um die Eingangssignale
|
|
\fill[gray!15] (axis cs:8.5,-67.9) rectangle (axis cs:12.5,8);
|
|
\node[font=\scriptsize, align=center, anchor=west] at (axis cs:12.25,5.0)
|
|
{Bereich um\\$f_1$ und $f_2$};
|
|
|
|
% Hilfsmakro:
|
|
% #1 = Frequenz
|
|
% #2 = Pegel
|
|
% #3 = Farbe
|
|
% #4 = Beschriftung
|
|
\newcommand{\spectrumline}[4]{%
|
|
\draw[#3, line width=1.4pt]
|
|
(axis cs:#1,-68) -- (axis cs:#1,#2)
|
|
node[
|
|
pos=1,
|
|
rotate=90,
|
|
anchor=west,
|
|
font=\scriptsize,
|
|
inner sep=1.5pt,
|
|
#3
|
|
] {$#4$};
|
|
}
|
|
|
|
% ------------------------------------------------------------
|
|
% Eingangssignale: 1. Ordnung
|
|
% ------------------------------------------------------------
|
|
\spectrumline{10}{0}{green!60!black}{f_1\;(1)}
|
|
\spectrumline{11}{0}{green!60!black}{f_2\;(1)}
|
|
|
|
% ------------------------------------------------------------
|
|
% Produkte 2. Ordnung
|
|
% ------------------------------------------------------------
|
|
\spectrumline{1}{-25}{violet!80!black}{f_2-f_1\;(2)}
|
|
|
|
\spectrumline{20}{-25}{violet!80!black}{2f_1\;(2)}
|
|
\spectrumline{21}{-25}{violet!80!black}{f_1+f_2\;(2)}
|
|
\spectrumline{22}{-25}{violet!80!black}{2f_2\;(2)}
|
|
|
|
% ------------------------------------------------------------
|
|
% Produkte 3. Ordnung
|
|
% ------------------------------------------------------------
|
|
\spectrumline{9}{-40}{red!75!black}{2f_1-f_2\;(3)}
|
|
\spectrumline{12}{-40}{red!75!black}{2f_2-f_1\;(3)}
|
|
|
|
\spectrumline{30}{-40}{red!75!black}{3f_1\;(3)}
|
|
\spectrumline{31}{-40}{red!75!black}{2f_1+f_2\;(3)}
|
|
\spectrumline{32}{-40}{red!75!black}{f_1+2f_2\;(3)}
|
|
\spectrumline{33}{-40}{red!75!black}{3f_2\;(3)}
|
|
|
|
% ------------------------------------------------------------
|
|
% Produkte 4. Ordnung, ausgewählte Produkte
|
|
% ------------------------------------------------------------
|
|
\spectrumline{2}{-55}{orange!90!black}{2f_2-2f_1\;(4)}
|
|
|
|
\spectrumline{19}{-55}{orange!90!black}{3f_1-f_2\;(4)}
|
|
\spectrumline{23}{-55}{orange!90!black}{3f_2-f_1\;(4)}
|
|
|
|
\spectrumline{40}{-55}{orange!90!black}{4f_1\;(4)}
|
|
\spectrumline{41}{-55}{orange!90!black}{3f_1+f_2\;(4)}
|
|
\spectrumline{42}{-55}{orange!90!black}{2f_1+2f_2\;(4)}
|
|
\spectrumline{43}{-55}{orange!90!black}{f_1+3f_2\;(4)}
|
|
\spectrumline{44}{-55}{orange!90!black}{4f_2\;(4)}
|
|
|
|
\end{axis}
|
|
|
|
\end{tikzpicture} |