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architeuthis 2025-01-29 19:22:50 +01:00
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4410-4412.tex
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@ -30,6 +30,7 @@
\end{itemize}
\section{General Description}
The 4410/4412 DDS Urukul card is a 4hp EEM module, part of the ARTIQ/Sinara family. It adds frequency generation capabilities to carrier cards such as 1124 Kasli and 1125 Kasli-SoC.
It provides 4 channels of DDS (direct digital synthesis) at 1GS/s. Output frequencies from \textless 1 to \textgreater 400 MHz are supported. The nominal maximum output power of each channel is 10dBm. Each channel can be attenuated from 0 to -31.5 dB by a digital attenuator. RF switches (1ns temporal resolution) on each channel provide 70 dB isolation.
@ -797,7 +798,9 @@ The measured RMS voltage divided by the full scale ideal RMS voltage (i.e. $V_\m
\end{figure}
\newpage
\section{Configuring Operation Mode}
Mode of operation is specified by a DIP switch. The DIP switch can be found at the top right corner of the card. The following table summarizes the required setting for each mode.
\ding{51} indicates ON, while \ding{53} indicates OFF.
@ -827,6 +830,7 @@ Mode of operation is specified by a DIP switch. The DIP switch can be found at t
\section{Urukul Single-/Double-EEM Modes}
4410/4412 DDS Urukul cards can operate with either a single or double EEM connections. When only EEM0 is connected, the card will act in single-EEM mode; when both EEM0 and EEM1 are connected, the card will act in double-EEM mode. 2-EEM mode when both EEM0 \& EEM1 are connected. Double-EEM mode provides these additional features in comparison to single-EEM mode:
\begin{itemize}
\item \textbf{1 ns temporal resolution RF switches} \\
Without EEM1, the only way to access the switches is through the CPLD, using SPI. \\
@ -842,6 +846,7 @@ Mode of operation is specified by a DIP switch. The DIP switch can be found at t
\codesection{4410/4412 DDS Urukul}
\subsection{10 MHz sinusoidal wave}
Generates a 10MHz sinusoid from RF0 with full scale amplitude, attenuated by 6 dB. Both the CPLD and the DDS channels should be initialized. By default, AD9910 single-tone profiles are programmed to profile 7.
\inputcolorboxminted{firstline=11,lastline=18}{examples/dds.py}
@ -853,7 +858,9 @@ If the synchronization feature of AD9910 is enabled, RF signal across different
Note that the phase difference between the 2 channels might not be exactly 0.25 turns, but it is a constant. It can be negated by adjusting the \texttt{phase} parameter.
\newpage
\subsection{Periodic RF pulse (AD9910 Only)}
This example demonstrates that the RF signal can be modulated by amplitude using the RAM modulation feature of the AD9910. By default, RAM profiles are programmed to profile 0.
\inputcolorboxminted{firstline=53,lastline=91}{examples/dds.py}
@ -900,6 +907,7 @@ Urukul was operated with a 50$\Omega$ termination to produce the waveform.
\end{tikzpicture}
\subsection{Simple amplitude ramp (AD9910 only)}
An amplitude ramp of an RF signal can be generated by modifying the \texttt{self.amp} array in the previous example.
\inputcolorboxminted{firstline=95,lastline=98}{examples/dds.py}