Before beginning a run, you have to make sure that the ULM trigger module is properly configured. The figure below shows the Readout GUI window after initializing the system.
Data can be recorded on disk by checking out the box Record. To end a data run, simply click End. The configuration parameters of the CFD thresholds, delays, fraction, etc. During tuning of the S, one typically needs to adjust thresholds only. The delay module allows software configurable delays to be applied to each of the signals indicated in the Channel column, which then form the TDC stops.
It is configurable to enable delays to be set with beam on target, as the needed delay may change depending on experimental conditions. The logic of the trigger decision is readily discerned from a visual inspection of this GUI. Setting the trigger configuration is also done using this GUI.
The different signal going through the trigger scheme can be inspected in the Data-U6 oscilloscope. By inspecting the various delays, widths and overlaps the user trigger can be configured. The Trigger GUI is discussed in greater detail here. The GUI used to display scalers rates can be open from the icon S Scalers in the desktop of u6pc5.
Alternatively, open a terminal on u6pc5, and type. In addition, the GUI includes a panel showing the time evolution of the live time calculated from the live-to-raw trigger ratio, and the live-to-raw clock ratio.
A list of scaler channels can be found here. Running in Slave mode requires to change the script CCBegin. Make sure that you set these variables to 1 if you want to run in Slave mode. By default, when running in Slave mode, data are recorded in the stagearea of the Master DAQ experiment account. It is however possible to record simultaneously data from the S into the S stagearea, using the multilogger option see ReadoutGUI figure above.
The S ReadougGUI offers the possibility to record data from four different S ring-buffers: rawccusb, rawvmusb, sbuilt, and sfilter.
The later is the most important since data from this ring buffer can be immediately processed by the S SpecTcl. This can be done following the steps:. There are several common reasons why the S DAQ may fail. The list below describes what to do to fix some of these problems. Sometimes, particularly if the S DAQ session ended in an uncontrolled way e.
If you find yourself in this situation try:. Very likely, the setting file. You should see a hidden file. If no, try the following:. This is shown by the error messages displayed by the system.
If you find yourself in this situation try the following:. Then, the system must be turned back on in the following order. User Tools Log In. Site Tools Search. Table of Contents S Software tools. Print quality can be clearly improved by adjusting the printer to paper and ink with PrintFab and its innovative color management.
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