You can take a signal builder block and import the excel file into the signal builder from its options.
Your pulse input to be specified must be represented in excel as follows.
e.g. time column followed by number of data columns(i.e, number of signals) in one sheet (i.e, one group in signal builder)
i.e, you specified a pulse from time 2 ~8 and elsewhere it is 0.
We can generate this pulse signal from Chart using temporal instructions also if We wanted to.