Next we checked for random coincidences by offsetting the time at which the the single channel analyser on arm \(B\) would output its pulse, though we maintained the angular correlation of 180 degrees. In doing so we made sure that a pulses arriving from the same event were offset from each other and that we were seeing only random coincidences. Small adjustments were made in this setting so that we could check as well the coincidences correlation in time.