Hello Fabrice,
Unfortunately at this moment, the sweep times are limited in selection. You could try to simulate this in a few ways.
If you are looking for the peak occupancy of this signal, you could setup the peak detector with a max hold trace.
If you are using the average detector, you could lower your VBW which would increase sweep time and use trace averaging.
You could use the average detector setup to get your channel power to create your mask, and then the peak detector setup to ensure no violations occur, if this is in fact your task.
Regards,
A.J.
