Attempting to create a waveform that starts as a 3kHz 1% duty-cycle (5V-0V) square wave (pulse).  Every 15 cycles, need duty-cycle to increase by 1%, ending in 100% (5V).  Not having success finding methods to perform this.  Was told that I could run a sweep of a pulse, but that is not the case.  Sweep option not available under Pulse.

Any suggestions on how to create this waveform / sequence would be appreciated.

Thank you.