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

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.