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4410-4412: add waveform for ram mod e.g.

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occheung 2021-12-06 11:52:31 +08:00
parent 11b1aee030
commit 74bc8ef797
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4410-4412.tex
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@ -444,6 +444,7 @@ def run(self):
\newpage \newpage
\subsection{DDS RAM Modulation (AD9910 Only)} \subsection{DDS RAM Modulation (AD9910 Only)}
This examples demonstrates that the RF signal can be modulated by amplitude using the RAM modulation feature of AD9910.
Set field \texttt{dds} as an Urukul channel, \texttt{cpld} as the corresponding Urukul CPLD. Set field \texttt{dds} as an Urukul channel, \texttt{cpld} as the corresponding Urukul CPLD.
\begin{minted}{python} \begin{minted}{python}
@ -479,6 +480,24 @@ def profile0_set(self):
self.cpld.io_update.pulse_mu(8) self.cpld.io_update.pulse_mu(8)
\end{minted} \end{minted}
The generated RF output of the above example consists of the following features in sequence:
\begin{enumerate}
\item A 10 MHz RF pulse for 2 microseconds.
\item No signal for 1 microseconds.
\item A 10 MHz RF pulse for 1 microseconds.
\item No signal for 3 microseconds.
\item Go back to item 1.
\end{enumerate}
The expected waveform is plotted on the following figure.
\begin{figure}[h]
\centering
\includegraphics[width=\textwidth]{ad9910_amp_mod.png}
\caption{RF output from DDS RAM modulation example}
\end{figure}
\newpage
\section{Ordering Information} \section{Ordering Information}
To order, please visit \url{https://m-labs.hk} and select the 4410 Urukul in the ARTIQ Sinara crate configuration tool. To order, please visit \url{https://m-labs.hk} and select the 4410 Urukul in the ARTIQ Sinara crate configuration tool.
The default chip is AD9910 (4410 Urukul), which supports more features. The default chip is AD9910 (4410 Urukul), which supports more features.