Latency - Touch Down (touchpad-latency---touch-down)

This is to test the reporting capabilities of the Windows Precision Touchpad device, with regard to latency and touch down.

Test name

• Test.AudioTouch.json

Core requirements tested

• Device.Input.Digitizer.PrecisionTouchpad.Latency

Test purpose

• Verifies that the device is able to report the first contact down within the required latency window.

Tools required

• RA Tool. For vendor information about the RA tool, see Hardware Requirements and Vendor Information.

• ptaudiotouch.exe

Validation steps

For detailed setup and test instructions, see How to measure Touch Down Latency by using an Acoustic Measurement Tool. a. Note: use ptaudiotouch.exe, rather than the touch executable.

b. Only 50 taps during the collection phase are required for this class of device.

Common error messages

• None.

Passing criteria

• A recorded average touch-down latency of less than or equal to 35.0ms will result in a pass.