Delay and Settling Time vs. Temperature

Design engineers often use test equipment to verify the logical correctness of digital logic circuits. They may design a test plan to test each individual logic function inside a new digital device. If they see that each step of the test results is correct, they can naturally conclude that "the machine works properly."

Unfortunately, real systems are much more complex than this. Many computer systems can pass the step-by-step test, but when the actual working speed, or the data throughput of the actual work is reached, the machine will not work. Only when the reader has a lot of experience working with complex systems will he or she have such an understanding, and it is indeed the case.

At high utilization, buses and other components within a digital system generate a lot of noise. The more data a system has, the more noise it generates. The best test plans step up to larger data flows, using a large number of data models, focusing on testing pipeline logic, memory access, and other major logic. Good data models identify noise couplings that can cause the system to fail when it is operating normally.