Specifications

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).