Dear Arjina,
you can control the setting of the time window through the Layout properties window. You could set the Simulation window to “Set bit rate”, “Set time window” or “Set sample rate”, which represents the frequency window. The parameters Sequence length and Samples per bit affect the setting of the time window and frequency window. Please refer to the User Reference Guide which you can access from the Help in the GUI toolbar.
The data at any output port can be view using the View Signal Visualizer, which you can export as txt or csv format.
Regards,
Ahmad