Captouch Button Calibration - Motorola ST7000 Basic Service Manual

MN002952A01-AH
Chapter 4: Test Setup and Testing
Test Parameter
Offset Count (no gray card)
Offset Count (with gray card)
Upper threshold
Lower threshold
4.14

Captouch Button Calibration

If there is a severe loss in degradation, calibrate the threshold according to the documented
percentage value of the detection.
Procedure:
1 Place radio on a flat surface area.
2 Start timer.
3 Execute TetraCom command CAP_TOUCH READ REG_DIFFERENCE_COUNT_SENSOR0 to read
different count repeatedly when the stylus moves close to touch the corresponding navigation
button.
The command used in
NOTICE: Ensure that the stylus touches the center of the capacitive touch button.
4 Take note of the timer reading when a value is observed (different count not 0). Continue
recording the different count reading for ten samples and calculate the average reading.
5 Write the threshold setting for the button referencing to the percentage of the average different
count value into the buffer using these commands.
CAP_TOUCH WRITE USER_TUNE_REG_BASE_THRESHOLD0 xx
CAP_TOUCH WRITE FACTORY_TUNE_REG_BASE_THRESHOLD0 xx
NOTICE: First command initiates write buffer to store into the user codeplug, and second
command stores as a backup tuning data. xx is the value to write into.
Threshold setting:
• Up: 65 %
• Down: 67 %
• Back: 68 %
• OK: 70 %
Software returns OK upon successful execution.
6 Remove stylus from button when the timer hits 5 seconds relative to the time noted in
the observed different count value.
NOTICE: Different count read within 5 seconds relative timing.
7 Repeat step 3 to step 6
Sensor button referencing:
• Up: SENSOR0
• Down: SENSOR6
62
Lower Limit
1900
2050
2300
2250
step 3 uses the Up button as the example (Up = SENSOR0).
for different button.
Upper Limit
3100
3500
3750
3700
step 4 of