The first thing to know about the motion detector is that it is misnamed -- it is actually a distance detector, or range finder. It is the same unit used in Polaroid cameras to measure distance from the camera to the subject. It works by timing how long it takes a sound wave to make the round trip to a target.
This first experiment is designed to learn something about the motion detector itself. Begin by connecting a TI-82 to the TI-CBL using the linking cable and the linking ports at the bottom of the two units. There is only one port at the bottom of the TI-82 but there are two ports at the bottom of the TI-CBL. The linking port is the smaller one. Next connect the motion detector to the SONIC port on the left side of the TI-CBL.
Now turn both units on. Press the PRGM key on the TI-82. You should see the program menu as shown on the leftmost screen below. Use the down arrow key to arrow down to the program AMOTION as shown in the second screen below. Press the ENTER key on the TI-82. You should see the third screen below. Press the ENTER key once again and you should see the last screen below.
Now look at your TI-CBL. The READY indicator should be on; the SONIC and Ft indicators should be on; and you should see a distance reading. As you point the motion detector at different targets, the distance reading should change.
You can disconnect the TI-82 from the TI-CBL and use the TI-CBL with the motion detector still attached as a distance measuring device to answer the following questions about the motion detector.
Now go on to the next experiment -- Getting to Know the Light Probe.