Report: Input lag mystery unravelled (Part 3 of 3)
Autor: Siobhan Hayes
10/20/2009, 20:08 CET
The suitability of an LCD monitor for gaming depends not only on its response time and streaking formation, but also, at least in the area of programming, on the response time with which input from the user such as mouse movement appears on the screen. A large number of factors may play a role when it comes to lags, including the monitor itself. The delay is also known as an input lag.
Until now, this delay was measured using stopwatch program which is displayed in clone mode on a cathode ray tube monitor and an LCD monitor. For measurement, the respective picture is photographed and an average value is calculated from photo sequences of 50 to 100 images.
However, are these values really meaningful? Is it correct to assume that a CRT monitor itself has no input lag? Does a significant lag arise when the analogue and digital inputs are used – and what do the stopwatch programmes themselves add?
A Tektronix DSA71254 oscilloscope is used.
All these questions – and many more- will be answered in our detailed report " of the input lag test process ". Since this article has become very detailed, we will publish it in three sections. The second part has been online since today. The last part will appear in seven days.
Hardware equipment worth more than 100,000 Euro is used to examine methods for measuring input lag to date. You can look forward to the result!