¥In order to improve the
quality of the time-delay matching, we need to use a calibration signal that
monitors the cable delay continiously (e.g. use the time calibrator signals
with a rate of 1 Hz and with period = range).
¥We make the assumption
here that the delay variations are due to changes in the delay of the delay
cable. There is no reason to
believe that the variations are due to the PMTs and in fact this can be
demonstrated by comparing the timing of the ORs (which do not show the drastic
variations, and travel over BNC cables to the CH) with the time of the
individual detector signal which travel of ribbon cables.
¥We need to develop the
tools to use these time signals to monitor the time delay.