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\large
%\vspace*{-0.5in}
\centerline {\bf 1.15\_V2.0 OBF INTEGRITY TEST }
\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: June 27, 1999}\\
\noindent{\bf Filename: obf\_intg} \\

\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\
\normalsize
There is an LED inside the ACIS camera housing which can be turned on to 
test the integrity of the optical blocking filter (OBF).
The measurement will consist of taking bias data with the ACIS-I and 
ACIS-S arrays with the LED off and then with the LED on.  If the filter 
is intact, there should only be a small increase in the average bias
level (except around some of the edges of the filter).


\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item start DEA HKP if necessary
\vspace{-0.10in}
\item configure the instrument to collect imaging array data
\vspace{-0.10in}
\item execute the science run with the ACIS-I array, including a dump
of the complete configuration information
\vspace{-0.10in}
\item configure the instrument to collect spectroscopy array data
\vspace{-0.10in}
\item execute the science run with the ACIS-S array, including a dump
of the complete configuration information
\vspace{-0.10in}
\item turn the LED on
\vspace{-0.10in}
\item configure the instrument to collect imaging array data
\vspace{-0.10in}
\item execute the science run with the ACIS-I array, including a dump
of the complete configuration information
\vspace{-0.10in}
\item configure the instrument to collect spectroscopy array data
\vspace{-0.10in}
\item execute the science run with the ACIS-S array, including a dump
of the complete configuration information
\vspace{-0.10in}
\item turn off the LED
\vspace{-0.10in}
\item power off the video boards and FEPs if necessary
\vspace{-0.10in}
\ee


\vspace{0.15in}
\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
On orbit, the focal plane temperature should be around -90~C.\\
Assumes that both DPAs and side A of the DEA are on and the flight SW
is running. \\
Assumes the standard patches are loaded.\\
ACIS internal LED should be off.\\

%\vspace{0.25in}
\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize


%\newpage 

%\vspace{0.25in}
\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
This procedure does not include a warm boot at the beginning in order
to preserve the focal plane temperature setting.  If a warm boot is
needed, the atomic procedure should be executed, followed by the
appropriate procedure to set the focal plane temperature.

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

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

{\bf V1.2}
\begin{itemize}
\item changed filenames from ``ccd\_obf'' to ``obf\_intg''
\end{itemize}

{\bf V1.3}
\begin{itemize}
\item added HW TLM verifiers in step 1 to check the BEP A boot
\item edited step 2 to include the configuration for data acquisition
with imaging array
\item edited step 3 to include all the dumps
\item edited step 5 to execute the first ACIS-S science run and to 
include all the dumps
\item edited step 6 to turn on the LED and configure for ACIS-I
\item edited step 7 to execute the second ACIS-I science run and to 
include all the dumps
\item edited step 8 to configure for ACIS-S
\item edited step 9 to execute the second ACIS-S science run and to 
include all the dumps
\item edited step 10 to turn off the LED
\item added step 11 to return to the canonical thermal standby state
\end{itemize}

{\bf V1.4}
\begin{itemize}
\item removed the warm boot which was in the old step 1
\item changed the expected value of the DPA A \& B and DEA A input
voltage  and changed the expected values of the 
DPA A \& B and DEA A input currents in steps 2.1 and 12.4
\item changed the PB mnemonics in steps 3.1, 5.1, 8.1, and 10.1
\item changed the start science command to ``XTZ0000005'' in steps
3.2, 5.2, 8.2, and 10.2
\item used command ``WSPOW00000'' in step 12.1 to power-down the video
boards and FEPs
\end{itemize}

{\bf V2.0}
\begin{itemize}
\item ACIS team signed-off version.
\item fixed typo in ``Sequence of Actions'' and added that the LED
should be off in ``Assumed Instrument State''
\item added comment in step 12.2 to verify that FEPs and video boards
are off
\end{itemize}


\newcommand{\tablecaptiontext}{OBF Integrity Measurement Procedure}
\input{obf_intg.tab}

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