===== GR trouble shooting =====


  * TDC1L is missing --> definition of the analyzer
  * ADC LR correlation
  * HV module doesn't accept the change of voltage <-- connection of the cable was not good
  * Plastic scintillators' signals are not good.
    * --> Spark? each signals of shape and counts should be checked
    * --> If the signals are strange, take data with DAQ. The trigger may be changed
    * --> Trigger should be made by three plastics

==== Beam doesn't come ====
  * When we change the GR angle from 8.5 degree to 0 degree in order to tune dispersion matching mode, the beam did not come.
    * --> Scattering chamber Faraday Cup is in the path of the beam.