Leaving expert:Heiko Itterbeck phone x4551/ private 8315625

WHEN, WHY and HOW to load the Digital Muon Trigger

WHEN and WHY ?

Normally, also if there are no problems, the Dig. Trigger should be loaded before lumi comes up !!!

There are only three extraordinary situations in which you should reload the trigger of the Digital Muon System:

• There was a power glitch
  • in the trailer or/and on Cryo Platform or/and on the North/South Gallery.
  From all these locations you then should get a BBL3 alarm like: 3
• The trigger of the Digital Muon System behaves in a way that the rates of the/one trigger element(s) either go to infinity or zero.
• You want to use a special trigger setup, in this case you should contact the expert anyway, whose (city)phone number is given in the head of this manual.

HOW ?

If there was a global power glitch in the trailer and the Dig.- -STC-Crate was off or affected,

BOOT THE MUON DAQ FIRST !!!

The program which loads the setup files down into the RAMs of the Digital Muon Trigger Boards is a LabView application. Normally it is already open and below the windows of the Digital Muon DAQ control program (then just choose LabView in the pull down menu in the uppper right corner). If not, start it by double click on the icon ``Digi_ _Trigger_Boot'' from the central screen area of the Digital Muon Sytem's Macintosh in Rack B12 in room 307 (You also can start it from the Apple menu) .

Have a look at the Trigger Boot Application's Main Panel !!!

When you see the window titled Digi_ _Trigger_Boot do the following:

• Check if in the application's pull down menu ``Reload everything'' is selected
  (If not, move the mouse cursor to the pull down menu, click and hold, and select ``Reload everything''.)

• Now click the blue ``Start'' button in the lower right corner.
  (From the text field ``Action:'' you can supervise WHAT the program does.)

• The ``Progress Indicator'' indicates the progress in units of loading steps, which take a different amount time( so don't worry, e.g. the loading of the SectorBoards will take about 7 s per RAM)

• If the loading fails, a ``Message'' field will show up and propose, what might be wrong. Follow the instructions and try again, if the reload fails again, call the expert.

• If the text field ``Action:'' shows ``Last Correct Reload'' again, check if date and time in the ``Last Loaded'' field are actual. If so, go back to the Digital Muon DAQ program.

In case of any other problems with the Digital Muon Trigger, call the expert !!!

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