4K HDMI Video Signal Lag Tester

This device measures the delay which takes a video signal to pass from the input until it is displayed on a television, monitor or projector screen. Commonly known as input lag, this delay can be a cause of various problems for users in different fields, from average home gamer to public displays and even specialised areas such the medical profession and broadcasting. Click here for info on display lag.

- Provides accurate measurement with 1 millisecond accuracy.

- Measures combined input signal processing and pixel response lag.

- Works with 4K LCD, LED, OLED TVs, monitors and projectors.

- Powered from any USB socket on a TV, PC or power-bank (cable supplied.)

- Standalone hardware device.

- Very simple to use.

- Portable design - fits in your pocket!

Connection to Screen or Projector

The device has a standard HDMI connector. You can use any standard 4K HDMI cable.

Also available from our Chinese distributor: https://www.amazingtech.com.cn/

LCD/LED Screens
Results will vary between the three reference marks on an LCD/LED screen. This is due to the way the screen is updated, generally starting from the top and ending at the bottom. The minimum result possible at the bottom of the screen should be 16ms (t = 1 / f = 1 / (60 Hz) = 16.67 ms). We recommend using the middle reference mark for recording results.

Projectors
When using a projector simply turn the device around so that the photo sensor on the back of the device is positioned inside one of the displayed reference marks. We recommend using the middle reference mark for recording results.

Fluctuating Results
This can be caused by a timing difference in the back light and screen refresh rate. In this instance we recommend using the lowest value. For best results we also recommend setting the screen to the highest brightness and reduce ambient lighting where possible to ensure the most accurate readings.

Proudly designed and made in the UK.

1. Plug an HDMI lead into the TV and Lag Test device. Plug in the USB cable for power, use either monitor USB socket, computer USB port or portable USB power device.

2. After selecting the correct input on the TV or screen (refer to manufacturer handbook) the device should output the testing signal.

3. Place device on the screen so that the photosensor is facing over one of the three displayed reference marks. Use the target symbol to help you line up the sensor.

4. Wait for the lag reading to settle down, which may take a couple of seconds and read measurement result from the screen.

4K Lag Tester - Quick Start Guide

Firmware and Configuration Software (4.6C)