HP 54750A, User Manual, Page: 399 / 478

The General Function Menus
Utility Menu
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Declassify
frame memory
Declassifying the memory in the mainframe is a method to ensure sensitive
information is not seen by individuals without the proper clearance .
Declassifying the mainframe places zeros in the instrument's RAM memory .
This clears all the setup memories , waveform memories , pixel memories ,
front-panel setups , channel memories , and function memories . Declassify the
mainframe in situations when you are concerned about the security of the
work you are performing.
F or example , you would declassify the mainframe when you are going to
leave the instrument unattended for a while or when someone is visiting your
area that does not have the clearance to know about your work. When the
instrument is not declassied, there is always the possibility that someone
could analyze the front-panel setups or RAM memory of the instrument to
determine the type of work you are performing. This process takes about
14 seconds to complete . Do not cycle power until the message is displayed.
After the instrument declassies the memory in the mainframe , the screen
displays the message:
Frame Memory is Declassified.
This message stays on the screen until the instrument is no longer
declassied.
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