Setting up an Older Pathfinder with the Infrared Headpointing Box.
Headpointing: The Original Pathfinder (Not PF2 or PF Plus) supports infrared headpointing. Select Headpointer from the Selection Technique menu. Point the headpointer at a key. When the activation delay has passed, the key is activated.
The Pathfinder infrared headpointing system consists of the infrared window on the top right front of the Pathfinder case, an infrared sensor (headpointer), a body pack and the battery charger for the body pack. The body pack contains the batteries that make the sensor work. (If the batteries run low, charge them by plugging the battery charger into the body pack.)
Note: Always use the battery charger (BCPS-1) that came with your headpointer. Any other charger may damage your headpointing batteries. Do not use the Pathfinder charger to charge the headpointer body pack.
If you have been using an optical headpointer, you will find that the infrared headpointer works differently. You do not point the sensor at the keys on the keyboard to activate them. Instead, you position the sensor so that it points at the infrared window on the front of the Pathfinder case. (You can still look at the keyboard and move your head to find the keys you want, as usual.) The sensor must be able to "see" the IR window in order for the system to work correctly.
You can mount the sensor wherever it is most convenient for you. If you intend to mount the sensor on the PRC headset, headband or your own eyeglasses, please read the Pathfinder Headpointer Mounting Instructions that came with your headpointer.
Pathfinder: Headpointer Averaging
Summary: Headpointing: Averaging can cut down on accidental key activations by selecting a number from 1-5. 2 is the default.
Averaging is a way of helping you cut down on accidental key activations caused by involuntary head movements. The number you select tells the pathfinder how far you must move out of one key location before a second key is activated. This generally means that when you cross the centerline between one key and the next key, the LED on the first key will go out and the LED on the second key will light.
If you select an averaging number higher than "1" you are telling the headpointer signal to "lag behind" any head movements you make. The higher the number you choose, the further into the key's area you must move before the LED on the second key will light.
Averaging numbers between 2 and 5 are recommended. The default is 2.
Pathfinder: Headpointer Horizontal & Vertical Adjustment
Summary: If you have trouble selecting keys on the edges of the keyboard, or positioning the pointer in the corners of the keyboard, use the adjustments in this option.
Once your headpointer is connected and you are positioned properly, move your head and try to place the cursor in each corner of the screen-top right, top left, bottom right and bottom left. Move your head from left to right across the screen and from the top to the bottom of the screen. Did all the keys on the keyboard become highlighted?
If you had trouble reaching the right or left edges, increase the Horizontal adjustment number. If you had trouble reaching the top or bottom edges, increase the Vertical adjustment number.
If just the slightest head movement to the left or right moved you off the edges of the screen, decrease the Horizontal number. If the slightest head movement up or down moved you off the top or bottom edges, decrease the Vertical adjustment number.
If you had trouble positioning the cursor in the corners of the screen, increase both the Horizontal and Vertical numbers. If you make large head movements you may lose the cursor easily. Try decreasing the Horizontal and/or the Vertical numbers. If you make small head movements, try increasing the Horizontal and Vertical numbers.
Headpointing adjustments that you set when you are fresh and alert may not work as well for you later in the day when you become tired. If this happens, you can make new vertical and horizontal adjustments. You can also save the settings under an icon sequence on your overlay so that different settings are always available to you.