Clarified Padiwa grounding remark, again!

diff --git a/trb3/WasaFrontend.tex b/trb3/WasaFrontend.tex
index 67f5461df66bc1ddcf059bca4930788d2d214f19..d92ba2d86681ac8a37c809bec0ec8a9b515b6350 100644 (file)
--- a/trb3/WasaFrontend.tex
+++ b/trb3/WasaFrontend.tex
@@ -85,11 +85,14 @@ Just some quick notes from a first user perspectives.
   which are green highlighted in the Webinterface seem to be read
   out). This is not valid for the two edge versions of the padiwa TDC
   firmwares.
-\item Ensure that the TRB boards and your PaDiWa FEE share the same
-  ground, otherwise the \verb!padiwa.pl! might return a random uid or
-  temperature, so your frontend is not accessible. This is by default
-  not the case if you use galvanically separated outputs of your power
-  supply unit.
+\item Ensure that the TRB3 and your PaDiWa FEE share the same ground,
+  otherwise the \verb!padiwa.pl! might return a random uid or
+  temperature, so your frontend is not accessible. Note that the power
+  supply ``ground'' of the TRB is NOT the same as the ground of the
+  board itself (The TRB3 components are powered over galvanically
+  separated supplies on the board itself, again). Thus, you should
+  connect your probably galvanically separated ground of the PaDiWa
+  power supply with one of the four pins JGND headers of the TRB3.
  
 \end{itemize*}