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authorMatthias P. Braendli <matthias.braendli@mpb.li>2015-02-04 19:39:15 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2015-02-04 19:39:15 +0100
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\section{Usage Scenarios}
\subsection{Experimentation}
\subsubsection{Creation of Non-Realtime Multiplex}
-The creation of a ETI file containing two programmes, one DAB and one \dabplus{} is covered in
-section \ref{sec-files}.
+The creation of a ETI file containing two programmes, one DAB and one
+\dabplus{} is covered in section \ref{sec-files}.
\subsubsection{Modulation of ETI for Offline Processing}
-The ETI file generated before can then be used with ODR-DabMod to generate a file containing I/Q
-samples. Here, we must chose between using the command line or the configuration file. For a very
-simple example, using the command line makes sense, but for more advanced features it is preferable
-to use a configuration file. For illustration, we will present both.
+The ETI file generated before can then be used with ODR-DabMod to generate a
+file containing I/Q samples. Here, we must chose between using the command line
+or the configuration file. For a very simple example, using the command line
+makes sense, but for more advanced features it is preferable to use a
+configuration file. For illustration, we will present both.
-To modulate the file \texttt{myfirst.eti} into \texttt{myfirst.iq}, with the default options, the
-command is simply
+To modulate the file \texttt{myfirst.eti} into \texttt{myfirst.iq}, with the
+default options, the command is simply
\begin{lstlisting}
odr-dabmod myfirst.eti -f myfirst.iq
\end{lstlisting}
-This will create a file containing 16-bit interleaved I/Q at $2048000$ samples per second. The
-transmission mode is defined by the ETI file.
+This will create a file containing 16-bit interleaved I/Q at $2048000$ samples
+per second. The transmission mode is defined by the ETI file.
The equivalent configuration file would be
\begin{lstlisting}
@@ -33,16 +34,17 @@ output=file
filename=myfirst.iq
\end{lstlisting}
-This is a very minimal file that defines only the necessary settings equivalent to the above command
-line options. The configuration file however supports more options that the command line, and
-becomes easier to manager once the set becomes more complex. It is best to use the example
-configuration availble in the \texttt{doc/} folder.
+This is a very minimal file that defines only the necessary settings equivalent
+to the above command line options. The configuration file however supports more
+options that the command line, and becomes easier to manager once the set
+becomes more complex. It is best to use the example configuration availble in
+the \texttt{doc/} folder.
\subsection{Interfacing Hardware Devices}
\subsubsection{Ettus USRP}
-ODR-DabMod integrates support for the UHD library that can interface with all USRP devices from
-Ettus. The following configuration file illustrates how to send the \texttt{myfirst.eti} over a USRP
-B200 on channel 13C:
+ODR-DabMod integrates support for the UHD library that can interface with all
+USRP devices from Ettus. The following configuration file illustrates how to
+send the \texttt{myfirst.eti} over a USRP B200 on channel 13C:
\begin{lstlisting}
[remotecontrol]
@@ -75,22 +77,25 @@ channel=13C
This example also shows more options that the example for the file output:
\begin{itemize}
- \item \texttt{remotecontrol telnet=1} enables the Telnet server that can be used to set
- parameters while the modulator is running.
- \item \texttt{loop=1} rewinds the input file when the end is reached. The same ETI file will be
- transmitted over and over.
- \item \texttt{gainmode=2} sets the GainMode to VAR, which reduces overshoots in the output.
- \item \texttt{digital\_gain=0.8} reduces the output sample deviation, to reduce compression in
- the USRP.
- \item \texttt{firfilter enabled=1} enables an additional FIR filter to improve the spectrum
- mask.
- \item \texttt{master\_clock\_rate=32768000} sets the USRP internal clock to a multiple of
- $2048000$, which is required if we want to use the native DAB sample rate.
- \item \texttt{txgain=40} Sets the analog transmit gain of the USRP to 40dB, which is specific to
- the B200.
+ \item \texttt{remotecontrol telnet=1} enables the Telnet server that can be
+ used to set parameters while the modulator is running.
+ \item \texttt{loop=1} rewinds the input file when the end is reached. The
+ same ETI file will be transmitted over and over.
+ \item \texttt{gainmode=2} sets the GainMode to VAR, which reduces
+ overshoots in the output.
+ \item \texttt{digital\_gain=0.8} reduces the output sample deviation, to
+ reduce compression in the USRP.
+ \item \texttt{firfilter enabled=1} enables an additional FIR filter to
+ improve the spectrum mask.
+ \item \texttt{master\_clock\_rate=32768000} sets the USRP internal clock to
+ a multiple of $2048000$, which is required if we want to use the native
+ DAB sample rate.
+ \item \texttt{txgain=40} Sets the analog transmit gain of the USRP to 40dB,
+ which is specific to the B200.
\end{itemize}
-Some of these options are not necessary for the system to work, but they improve the performance.
+Some of these options are not necessary for the system to work, but they
+improve the performance.
\subsubsection{Other Hardware}