how can i change pulse width in simulink?

i need to control the pulse width (bit period)of my PN sequence circuit because i want to use it as digital data in digital modulation

this is my circuit and waveform

the number of bits are 51 i tried to change simulation stop time but its not work

Answer 1

[Azzi Abdelmalek]

You change the sample time of your blocks or the fixed step time.