Why use LASAR simulation in your digital diagnostic test strategy?

Creating large digital pattern sets for an electronic assembly can be a daunting and tedious task. Simulation offers a number of advantages to the TPS development engineer who needs to generate and verify large digital pattern sets, and LASAR is the product that provides the most accurate and reliable results.

LASAR simulation for test will:

• Automatically generate “good” circuit response patterns. While stimulus patterns are relatively easy to create, predicting the good circuit response to each stimulus is difficult to do without the aid of simulation.

• Predict test reliability problems ahead of time. Test development for an electronic assembly on ATE requires careful attention to numerous issues that can affect the stability and reliability of a test program. They are very difficult to predict without simulation and often only appear during the test integration phase of the project, or worse, after the test program is released. This results in several iterations of the development cycle to correct the immediate and latent problems that drives up the cost of test. LASAR simulation can:

  • Predict worst case timing problems

  • Predict the effect of the tester and test fixture on the board under test

  • Predict the compatibility of the test with the target tester

• Determine correct placement of response windows. Even if the correct stimulus pattern set is applied on the ATE, if the responses are not captured at the correct time, faults on UUTs can go undetected. LASAR allows you to place response windows and observe the activity in them.

• Predict fault coverage. The primary objective of test is to detect faults on a UUT. Simulation provides a deterministic, quantitative measure of fault coverage. LASAR simulation results are used throughout the Military and Aerospace industry as the standard measure of digital test quality.

• Automatically generate diagnostic data. Even after a fault is detected, it must be localized to its source so that the proper repair action can be performed. Manual generation of diagnostics is generally never done because of the time it takes to create and verify them. LASAR simulation results include guided probe and fault dictionary diagnostic as a by-product of the simulation process.