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\centerline {\bf 5.17\_V2.0 SWITCH FROM BEP B TO BEP A } 
\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: May 26, 2016}\\
\noindent{\bf Filename: switch\_bepb\_a} \\


\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\

This is a contingency procedure to switch from using BEP B to using
BEP A.  

\normalsize
\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item Issue power-down command for FEPs and video boards
\vspace{-0.10in}
\item Select BEP A
\vspace{-0.10in}
\item Cold boot BEPs
\vspace{-0.10in}
\item Verify BEP A boots from SW TLM
\vspace{-0.10in}
\item Check HW LEDs
\vspace{-0.10in}
\item Check SW LEDs
\vspace{-0.10in}
\item Issue power-down command for FEPs and video boards

\ee

The procedure does a cold boot to get the instrument into a known
state, so if there were patches loaded into
BEP A they will be lost.  The operator should be cognizant if patches
must be subsequently loaded.  The final power-down command ensures that the control register in the newly active BEP reflects the current FEP power status.

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\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Assumes that DPA A \& B are on.\\
Assumes BEP B is functional and can accept a power-down command.\\


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\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize
None. \\

%\newpage 

\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
Any patches loaded into BEP A will be removed as a result of this
procedure.  This procedure resets the focal plane temperature setting.\\

\vspace{0.15in}
\normalsize
\noindent {\bf REFERENCES:} \\
\normalsize

\normalsize
\noindent {\bf CHANGE HISTORY:} \\
\normalsize

{\bf V1.0}
\begin{itemize}
\item Initial version, based on switch\_bepa\_b V2.1
\item Added warnings about focal plane temperature setting.
\item Minor formatting change to table.
\item Added steps to power down FEPs and video boards before and after the switch.
\item Added intiial state for BEP B.
\end{itemize}

{\bf V2.0}
\begin{itemize}
\item ACIS team signed-off version.
\end{itemize}

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\newcommand{\tablecaptiontext}{SWITCH FROM BEP B TO BEP A}
\input{switch_bepb_a.tab}

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