From fac9cdeb7771b4ab7f5d27c08cb048300570157b Mon Sep 17 00:00:00 2001 From: Andreas Neiser Date: Fri, 15 Mar 2013 16:58:03 +0100 Subject: [PATCH] Quick notes for PaDiWa --- trb3/WasaFrontend.tex | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/trb3/WasaFrontend.tex b/trb3/WasaFrontend.tex index 5b5253c..0efa56c 100644 --- a/trb3/WasaFrontend.tex +++ b/trb3/WasaFrontend.tex @@ -10,7 +10,8 @@ The device contains: \item on-chip Flash to store configuration data \end{itemize*} - + + \subsubsection{Configuration} All configuration is done via a single-device SPI bus. The interface is kept similar to the LTC2600 to use the same SPI master code. Note that up to 16 commands can be sent to a board with one trbnet access: Load all commands to registers 0xd400 - 0xd40f, set the correct amount in 0xd411 plus Bit 7 to select the multi-write mode. @@ -44,4 +45,23 @@ Note that up to 16 commands can be sent to a board with one trbnet access: Load \end{tabularx} \caption{SPI component selection} \label{tab:spiselect} -\end{table} \ No newline at end of file +\end{table} + +\subsubsection{Some Hints for Beginners} + +Just some quick notes from a first user perspectives, also very bad +Latex formatting, sorry. +\begin{itemize} +\item The thresholds can either be set by the padiwa.pl script in the + daqtools repository or via the web frontend (choose Padiwa SPI and + set the reference to 3300 mV). There's also some script which sets + the thresholds automagically. +\item Due to the somewhat special design, it is expected behaviour + that you see no counts for very low thresholds, then some noise at + about the bias voltage (approx. 1.7 V) and then again no counts at + very high thresholds. The Board is designed for negative input + peaks, but positive could also work. +\item Maybe you need to set the invert feature of the Padiwa board + such that the TDC in the peripheral accepts the events (only events + which are green highlighted in the Webinterface seem to be read out). +\end{itemize} \ No newline at end of file -- 2.43.0