To make the crust:
1. Heat the oven to 325°F. Break the graham crackers into small pieces and place in the bowl of a food processor along with the sugar and salt. Pulse until the cracker crumbs are semi-fine (they shouldn't be powdery but not in large shards either) and the crackers and sugar are combined. Pour in the butter and pulse until the butter is blended in and the mixture isn't crumbly and holds its shape when you squeeze it, about twelve 1-second pulses.
2. Transfer the crust to a 9-inch springform pan and push and press the crumb mixture into the bottom and two-thirds of the way up the sides of the pan. Use the bottom of a measuring cup to press the crust into place. Set aside.
To make the filling: