Overview

The Gain setting in DISPLAX Service controls the amplification level of the touch signal injected by the DISPLAX touch controller. Proper Gain adjustment is essential for achieving accurate touch detection while avoiding noise, false touches, or unstable behavior.

Gain tuning is typically performed together with Threshold and Shield settings.

Check the Current Gain Value

To view the current Gain value on a local device, run:

displaxservice -a 127.0.0.1 --gain

This command returns the active Gain value used by DISPLAX Service.

Set the Gain Value

To change the Gain value, specify a numeric value.

Example: Set Gain to 5

displaxservice -a 127.0.0.1 --gain 5

The new Gain value will be applied immediately to the connected touch controller.

Important: Gain Value Inversion

⚠ Important Note
The Gain value used in DISPLAX Service (command line) is inverted compared to the Gain value shown in DISPLAX Connect.

This means:

• A higher number in displaxservice = lower Gain in DISPLAX Connect

• A lower number in displaxservice = higher Gain in DISPLAX Connect

Gain Value Mapping

Example:
Setting:

displaxservice --gain 5

Is equivalent to Gain = 2 in DISPLAX Connect.

What Gain Controls

• Higher Gain increases touch signal amplification

• Lower Gain reduces sensitivity and noise amplification

Improper Gain settings may cause:

• Missed touches (Gain too low)

• False or unstable touches (Gain too high)

When to Adjust Gain

Adjust the Gain when:

• Touches are not detected reliably

• Light touches are ignored

• Noise or ghost touches appear

• Threshold adjustments alone do not resolve stability issues

Best Practices

• Start with moderate Gain values.

• Adjust Gain before fine-tuning Threshold.

• Test touch performance across the entire sensor surface.

• Avoid maximum Gain unless required by thick glass or large sensors.