Ramp is a setting that allows your PAP machine to start at a lower pressure than your prescription level. The ramp can be set in increments of 5 mins up to 45mins. Some machines have an auto ramp feature; where the machine determines how quickly the pressure increases based on how quickly you are falling asleep. Ramp should be turned on if you are having difficulties falling asleep at your full pressure. You can also use the ramp feature if you wake up during the night and have difficulties falling back asleep.