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refactor: bandbreite 3

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Matthias Jung
2026-08-08 17:47:04 +02:00
parent 51f80b5a9a
commit 62b15866ef
4 changed files with 211 additions and 1 deletions
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contents/drawings/1121.tex
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% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{tikzpicture}
\begin{axis}[%
/pgf/number format/1000 sep={ },
/pgf/number format/use comma,
axis lines=middle,
axis line style={-Triangle},
every major tick/.append style={thick, black},
grid=major,
grid style={line width=.1pt, draw=gray!10},
major grid style={line width=.2pt,draw=gray!50},
xticklabel=\empty,
yticklabel=\empty,
xtick style={draw=none},
ytick style={draw=none},
xmin=3,
xmax=20,
ymin=0.0,
ymax=20.5,
xmajorgrids=false,
ymajorgrids=false,
xlabel style={at={(ticklabel* cs:1)},anchor=north east},
ylabel style={at={(ticklabel* cs:1)},anchor=north east},
ylabel={$P$},
xlabel={$f$},
width=\linewidth*\getDarcImageFactor,
height=4cm,
scale only axis
]
\addplot[color=black,name path=B] coordinates{
(0,0)
(1,0)
(2,0)
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};
\addplot[color=black,smooth,name path=A, thick] coordinates{
(0,0)
(1,0.5)
(2,0.5)
(3,0)
(4,0.7)
(5,0.5)
(6,0.5)
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(8.5,18.9)
(9,20.0)
(9.5,19)
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};
\addplot[DARCred, fill opacity=0.4] fill between[of=A and B,soft clip={domain=0:8}];
\addplot[DARCred, fill opacity=0.4] fill between[of=A and B,soft clip={domain=16:20}];
\addplot[DARCblue, fill opacity=0.4] fill between[of=A and B,soft clip={domain=8:16}];
\draw[DARCred] (axis cs: 6.0,10) node[](A){\qty{0.5}{\percent}}; \draw[DARCred](A.south) -- (axis cs: 7.5,1);
\draw[DARCred] (axis cs: 18.0,10) node[](A){\qty{0.5}{\percent}}; \draw[DARCred](A.south) -- (axis cs: 16.5,1);
\draw[DARCblue] (axis cs: 12.0,5) node[](A){\Huge\qty{99}{\percent}};
\end{axis}
\end{tikzpicture}%
contents/drawings/1121.txt
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TODO
contents/sections/bandreite_3.md
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Für die Beurteilung der gesetzlichen Vorgaben hinsichtlich der Bandbreite einer Aussendung wird gemäß der Amateurfunkverordnung die mittlere Sendeleistung im ausgesendeten Bandbereich betrachtet. Hierbei müssen sich $\qty{99}{\percent}$ der Sendeleistung innerhalb der Grenzen der geforderten Bandbreite befinden. Somit darf maximal $\qty{0,5}{\percent}$ der Sendeleistung auf angrenzende Bandbereiche unter- und oberhalb des Sendesignals entfallen. Dies ist insbesondere für FM-Aussendungen wichtig.
%TODO: Einfügen Grafik/Skizze hinsichtlich Bandbreite und Leistungsverteilung.
<margin>
[picture:1121:bandbreite_leistungsverteilung:Leistungsverteilung einer Aussendung]
</margin>
<tip>
Für die Messung der Leistungsanteile hinsichtlich einer Aussendung und deren Bandbreite ist ein Spektrumanalysator erforderlich. Hierbei haben moderne Geräte oft integrierte mathematische Funktionen, so dass die mittlere Leistung innerhalb einer bestimmten Bandbreite rechnerisch ermittelt werden kann (Kanalleistungsmessung, Nachbarkanalleistungsmessung). Genauere Informationen hierzu können der Bedienungsanleitung des jeweiligen Gerätes entnommen werden.