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\begin{document}
%\input dspace12.tex
%\input pstricks.tex
%\input psfig
\newcommand{\be}{\begin{enumerate}}
\newcommand{\ee}{\end{enumerate}}
\newcommand{\bc}{\begin{center}}
\newcommand{\ec}{\end{center}}
\newcommand{\bi}{\begin{itemize}}
\newcommand{\ei}{\end{itemize}}
\newcommand{\bd}{\begin{description}}
\newcommand{\ed}{\end{description}}
\newcommand{\bt}{\begin{tabbing}}
\newcommand{\et}{\end{tabbing}}
\newcommand{\eg}{{\it e.g.~}}
\newcommand{\ie}{{\it i.e.~}}
\newcommand{\ul}{\underline}
\newcommand{\axaf}{{\em AXAF}}
\def\la{\hbox{\rlap{$<$}\lower0.5ex\hbox{$\sim$}\ }}


\large
%\vspace*{-0.5in}
\centerline {\bf 1.22\_V2.0 TURN ON PRESSURE TRANSDUCERS A \& B}

\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: June 23,1999}\\
\noindent{\bf Filename: xdcr\_ab\_on} \\

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

The ACIS internal pressure should reach a very low, perhaps
unmeasurable, value once the little vent valve has been opened
for more than 3 hours.  Nevertheless, it will be useful to
verify this state early in the mission.  The transducers may be turned
on and valid pressure readings may be received with both sides of the
DPA and the DEA off.  However, if one side of the DPA is on, the
verifiers indicating that the transducers are on will be valid.
It is expected that this procedure will be used during transfer orbit.

\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item turn on the pressure transducer A \& B 
\item measure the pressure
\ee


\vspace{0.15in}
\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Assumes that the PSMC has power from the spacecraft. \\

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\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:}\\
\normalsize
Assumes that \axaf\/ ISIM RCTU is powered on and in telemetry
format 1, 2, or 4. \\

%\newpage 

%\vspace{0.25in}
\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
ACIS-C-002 \\


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

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

{\bf V2.0}
\begin{itemize}
\item ACIS Team signed-off version
\item changed required telemetry format to 1,2,4 or 6
\item added units of minutes (m) to the Time Req column
\end{itemize}



\newcommand{\tablecaptiontext}{Turn on Pressure Transducers A \& B}
\input{xdcr_ab_on.tab}

\end{document}


