Using Headpointing in the Older Vantage/Original Vanguard device
Vantage/Vanguard: Headpointing Selection Technique
Summary:
Headpointing allows you to make direct selections from the keyboard by using the device's infrared emitters and a separate infrared sensor and body pack. The sensor plugs into the body pack. You also received a separate battery charger to charge the body pack batteries.
Note: Always use the battery charger that came with your device. Any other charger could damage your batteries.
The devices infrared headpointing system consists of an infrared emitter window on the top front of the unit's case, an infrared sensor, a body pack, and the battery charger. In order for the sensor to work you must mount the sensor and then plug the sensor into the body pack. The body pack contains the batteries that make the sensor work. (If the batteries run low, you charge them by plugging the charger into the 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 emitter window on the device's 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 infrared window in order for the system to work correctly.
Headpointing Options: Averaging
Summary:
Averaging is a way of helping you to cut down on accidental key activations caused by involuntary head movements. The number you select tells your device 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 first key will become un-highlighted and the second key will light up.
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 next key's area you must move before the second key will become highlighted.
Headpointing: Horizontal Adjustment and Vertical Adjustment
Summary: 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 and bottom edges, decrease the "Vertical" number.
If you had trouble positioning the cursor in the corners of the screen, increase both the "Horizontal" and "Vertical" adjustment numbers.
If you make large head movements you may lose the cursor easily. Try decreasing the "Horizontal" and/or "Vertical" adjustment numbers.
If you make small head movements, try increasing the "Horizontal" and "Vertical" adjustment numbers.
Horizontal and Vertical Adjustments are Headpointing options. If you have trouble selecting keys on the edges of the keyboard, or positioning the pointer in the corners of the keyboard, making these adjustments will help. Once you are positioned and ready to use your headpointer, 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 screen become highlighted? Averaging is a Headpointing option. You can select a number from 1-5. Numbers between 2 and 5 are recommended. The default is 2.