The threshold is computed by combining the median amplitude value with specified time- and space-variant threshold factors. For standard batch processing, threshold factors are specified by the user in the setup. To specify threshold factors, when asked to “Select method of determining threshold factors”, choose the option to “Define threshold factors using medians or median deviations”. This choice will activate the MULTPLIER_THRESHOLD parameter set from which the THRESHOLD_FACTOR parameter may be defined. Each threshold factor is associated with a time specified by the TIME parameter. The TIME_TYPE parameter determines whether the specified times are absolute times (ABSOLUTE option), or are specified as delay times relative to the start time of the earliest live window of the trace (RELATIVE option), or are specified as window numbers. Threshold factor values are linearly interpolated between specified times (or windows). (4)