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
1 changed files with 19 additions and 0 deletions

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@ -444,6 +444,7 @@ def run(self):
\newpage
\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.
\begin{minted}{python}
@ -479,6 +480,24 @@ def profile0_set(self):
self.cpld.io_update.pulse_mu(8)
\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}
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.