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Touch Controllers Reference Guide30

Calibrate Extended Procedure

To use the CX command:

1. Enter the Calibrate Extended (CX) command.

The controller sends an acknowledgment of <SOH>0<CR>.

2. Touch the screen at a lower left target, which is located 12.5%

(1/8) in from the corner of the video image.

The controller returns an acknowledgment of <SOH>1<CR>.

This is a positive response. If you receive a negative response, try

touching the screen again.

3. Touch the screen at an upper right target, which is located 12.5%

(1/8) in from the corner of the video image.

The controller returns an acknowledgment of <SOH>1<CR>. If

you receive a negative response, try touching the screen again.

Touching the two valid calibration points results in a successful

calibration. If either calibration point is invalid, the calibration fails.

Table 6 lists how the controller responds if the Calibrate Extended

failed.

Table 6. Response to Failed Calibration Extended

Controller Response to Failed Calibration Extended

Serial/SMT2

Serial/SMT3V

Serial/SMT3RV

Serial/SMT2 Daughterboard

Serial/SMT3V Daughterboard

PC Bus SMT2

PC Bus SMT3V

PC Bus SMT3RV

Returns to the factory default calibration.

Serial/SMT3

Serial/SMT3R

TouchPen 4

TouchPen 4+

MousePort

Returns to the previous calibration values

(that is, these controllers discard the touch

coordinates and do not change the calibration

points from their previous values).

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MicroTouch Systems FPD Touch Monitor Spécifications Page 30