The manual presents explanation related to ping sonar sensor, program example, ultrasonic distance sensor, measurement, and ping distance value. In the manual you can read information about ultrasonic, raw distance value, parallax, and sensor.
Lots of things such as sonar sensor, distance, conversion factor, and conversion are presented in this manual. These are taken from the manual:
If you want to connect your PING))) sensor to a Board of Education using a servo extension cable, follow these steps: 1. When plugging the cable onto the PING))) sensor, connect Black to GND, Red to 5 V, and White to SIG. 2. Check to see if your Board of Education servo ports have a jumper, as shown at right. 3. If your Board of Education servo ports have a jumper, set it to Vdd as shown. 4. If your Board of Education servo ports do not have a jumper, do not use them with the PING))) sensor.
Giving more content, this manual explains info such as ping sonar, microcontroller, ultrasonic burst, and distance sensor.