Instructions for the 3D Interactive Display

1) Find the Right Window

• If Ravel's screen is blank, wake it up by moving the mouse.
• The last user may have left IDA up and running. If there is a window that contains an event display with menus, simply position the cursor in that window and proceed from section 4 below.
• If there is no interactive display window that contains menus, see if there is an active IDA window ready for the 3D display.
  • Find an active IDA window, position the cursor in the window and type WHO.
  • If IDA responds "This window controls the 3D Interactive Display", you have found the right window.
  • Type DSP INT and then proceed from section 4 below.
• It may be that the window that controls this job has been iconized. To open an iconized window, position the cursor on the icon and click with the left mouse button
• If there are windows up, but none of them gives the right response to WHO, proceed from section 3 below
• If you are confronted by the unix logon screen (a prompt that looks like "login:"), proceed from section 2 below.
• If the previous user has left the system in such a mess that you cannot find your way around, clean things up by logging off Ravel entirely.
  • Place the cursor on a blank area of the screen.
  • Click the left mouse button and select "Quit mwm"
  • Confirm "OK"
  • This will return you to text mode. Then Type: logout
  • Start fresh from section 2 below.

2) Log On to Ravel and Start Xwindows

• At the prompt "login:", enter the account name (in lower case): sldmcm
• Enter the password (in lower case):
• Ignore the message about "xhost unable to open display"
• When you see the prompt "sldmcm@ravel $", start xwindows by typing (in lower case): open startx
• The screen will be blank for a while, then a clock will appear, then some other windows. When you see a window titled "xload", xwindows is up and running.

3) Start the Job

• Go to the RTH workstation's "Session Manager" and select "Start_3D_Display" from the "Run_Time_OFFline" menu.
• A job status window will appear on the RTH workstation. It will be titled "FileView: Start_3D_Display". Click on its upper right hand corner to iconize it. Come back to read it only if the job fails to appear on Ravel.
• A DECTERM window will appear on Ravel. You will see the IDA job run there.
• When this window contains the IDA prompt, type DSP INT.
• A small window titled "UG" will appear on Ravel.
• Click and drag (left mouse button) to open and stretch this window into your desired size graphics window
• The window will remain clear for a few moments (just long enough for you to wonder if it's working) and then the display will appear If the display flashes or otherwise acts strangely, get it to redraw by again resizing it.

4) Using the Display

• The display has two modes selected from toggles at the bottom of the event display main menu. The mode selection sets various parameters that make the display useful for viewing either reconstructed or raw data. Use RECON DATA mode to view reconstructed data. Use RAW DATA mode to view raw data including cosmics data. These mode toggles just get you initial settings, you can fine tune these settings by using the other display menus.
• Below the mode toggles are three more toggles that let you select the source of the data to be displayed. Use Data From Multiplexor to see data from the event stream. Use Data From Latest Z to see the most recent Z candidate reconstructed by EPEM. Use Data From Open Read to see some other data from disk.
• If you have selected Data From Multiplexor, then each time you select GO 1, you will get the latest event from the SLD_ACQ event pool.
• If you have selected Data From Latest Z, then each time you select GO 1, you will get the latest Z that has been reconstructed by EPEM. If GO 1 does not get a new event, check that EPEM is running.
• If you have selected Data From Open Read, then you should provide an OPEN READ statement to read in some data. You can just leave the cursor in the display window while you type this Open Read command, or you can hit the Return to Ida button and issue the Open Read statement from the Ida window.
• You can set things up so the display continuously loops through events. Just position the cursor on the display window and hit F 11. The display holds each event for fifteen seconds and then automatically goes on to the next event. Hit F 11 a second time to end the loop.
• To get a hard copy, pick IMMED HARD COPY in the event display main menu (output is to the IMAGEN printer in the SLD control room)
• See the "3D Interactive" section of the DSP help file for details (you can bring up the help file by typing HELP DSP from IDA or DCL)
• When you are done, please leave the IDA job running for the next user.

  5) In Case of Problems

• Report problems to PERL@SLAC.STANFORD.EDU.