GTCO CR 1212 - Users Guide User Manual

Page 39

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CR 1212 39


Chapter 7: Checking the Graphics Tablet

Section A: Tablet Calibration

The tablet calibrates each time it’s turned on. The calibration takes less than three seconds
and beeps once completed.

Section B: Power (and Proximity) Light

The power light on the tablet serves two purposes. First, it notifies when the tablet is on
and receiving power. Second, it is a proximity indicator. The light remains lit when the
stylus/cursor is in-prox. It blinks when the stylus/cursor is out-of-prox. If the light blinks
when the stylus/cursor is in-prox, then the tablet is malfunctioning. Turn it off for an
estimated 10-20 seconds and then turn it back on.

Section C: A Quick Functional Check

Here is a quick functional check that you can perform. Its purpose is to ensure that the
interface is working and that all parts of the tablet active area are being read by the
stylus/cursor.

1. Connect the tablet to a “dumb” terminal. The terminal must be set up to

communicate in full duplex at 9600 baud. If the unit is a Bit Pad One or Two
configurations, the terminal’s data protocol must be an 8-bit frame: even parity and
seven data bits. If the unit is a CR configuration, the terminal’s data protocol must
be a 9-bit frame: odd parity and eight data bits.

2. On the terminal, enter the command string: zA@. The tablet is now in Stream Mode

sending reports in an ASCII format.

3. Starting at the lower left corner of the tablet, run the stylus/cursor across the

tablet’s active area. You should see reports on the terminal in the following ASCII
format: F,XXXX,YYYY,P

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