public double[] getImage() throws Exception {
   return EPICS_CONTROLLER.cagetDoubleArray(getChannel(IMAGEDATA));
 }
 public double[] getExtIO() throws Exception {
   return EPICS_CONTROLLER.cagetDoubleArray(getChannel(EXTIODATA));
 }
 public double[] getSpectrum() throws Exception {
   return EPICS_CONTROLLER.cagetDoubleArray(getChannel(SPECTRUMDATA));
 }