barcode scanner input asp.net LOADED BOARD TESTING in Software

Creator QR-Code in Software LOADED BOARD TESTING

LOADED BOARD TESTING
Decode QR Code ISO/IEC18004 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Generator In None
Using Barcode encoder for Software Control to generate, create Denso QR Bar Code image in Software applications.
For a given vector and fault, the output pins that are expected to fail can be looked up in this dictionary. In a testing scenario, we take a failing test vector and list of failed output pins, and attempt to look up a fault (or faults) that match the failed pin behavior for that vector. Fault dictionaries work well when actual defects that cause a circuit to fail closely match the fault model. When defects occur that vary from the modeled faults, then a dictionary lookup may come up empty (no matching fault), or matches may be found but point to the wrong faults, or so many matches may be found that it is impractical to examine them all to see which (if any) are the actual problem. Dictionary generation is computationally intensive, dictionaries may consume huge amounts of storage space,* and dictionary lookups may not work. This technology was invented along with small-scale integrated bipolar technologies such as early TTL or ECL. The advent of large-scale integration and CMOS technology has made fault dictionary technology nearly useless in board testing practice. Performance testers are intended to emulate the environment the board would encounter in its native application. This means the tester itself needs to be carefully customized to supply this environment, or it must be a general-purpose tester with a great degree of flexibility. Flexibility brings cost, so commercial functional testers tend to be among the most expensive. Programming such machines is a complex task, due both to the flexibility of the tester and to the nature of the test requirements. It is difficult at best to get automated support for functional test programming. Typically, such programming takes extreme patience and a high level of skill again, two more costs. To compound this, any last-minute design changes to the board may cause expensive and time-consuming test modifications or invalidate the tests altogether.
Recognize Quick Response Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
Make QR Code 2d Barcode In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create QR image in .NET applications.
Testing Boards for Manufacturing Defects Manufacturing defects can be detected by a functional test, but because functional testers are expensive and difficult to program, other techniques have arisen to test for them. These testers have one or more of the following advantages: 1. They are much easier to program, often requiring less than 10 percent of the time of functional test development. 2. Automatic test program generators that analyze the circuit design database do most of the work and relieve the skill required of the programmer. 3. Their programs are much less sensitive to design changes because they take a divide-andconquer approach; the effects of design changes are localized, requiring that only a portion of the test be reprogrammed. 4. They offer much better defect resolution for many defects because localized portions of the circuit are being analyzed, reducing diagnostic complexity. The principal technology is the in-circuit tester. This tester utilizes a high degree of nodal access that is, connection to printed circuit traces to perform its work. Nodal access is provided by a unique fixture called the bed of nails. (See Fig. 55.4.) This fixture is made up of a platen that supports the board under test. The platen is drilled with holes below each target point for nodal access. In the holes are spring-loaded nails that contact the target points on
QR Code Maker In .NET
Using Barcode encoder for ASP.NET Control to generate, create QR image in ASP.NET applications.
Printing QR Code In VS .NET
Using Barcode printer for Visual Studio .NET Control to generate, create QR-Code image in .NET applications.
* For example, say a circuit has 100,000 gates. The number of stuck-at faults to be simulated may easily be 200,000. A set of test vectors for these may easily exceed 500,000. If the circuit has a fairly normal complement of 250 outputs, then a fault dictionary for this example would consume the product of faults times vectors times outputs (2.5 1013 bits, or about 3.125 terabytes, give or take a gigabyte). Fault simulation times lasting months, even on very fast computers, have been reported. Of course, larger circuits will need more! CMOS VLSI circuits have several defect modes that are inconvenient to model in popular fault simulators, and thus fault models are more likely not to match defects. Two of the offending defect modes are bridging faults (intermetal shorts) and metallization opens that may actually introduce capacitive memory into a circuit. These are difficult to represent with traditional fault-modeling techniques.
QR-Code Generator In Visual Basic .NET
Using Barcode drawer for VS .NET Control to generate, create QR Code JIS X 0510 image in VS .NET applications.
Universal Product Code Version A Creation In None
Using Barcode printer for Software Control to generate, create UPC A image in Software applications.
DataMatrix Generation In None
Using Barcode generator for Software Control to generate, create DataMatrix image in Software applications.
Creating USS-128 In None
Using Barcode maker for Software Control to generate, create GS1-128 image in Software applications.
Print Bar Code In None
Using Barcode creation for Software Control to generate, create barcode image in Software applications.
Code39 Drawer In None
Using Barcode creation for Software Control to generate, create Code 3/9 image in Software applications.
Printing GTIN - 14 In None
Using Barcode drawer for Software Control to generate, create DUN - 14 image in Software applications.
EAN 128 Creation In Java
Using Barcode creator for Android Control to generate, create USS-128 image in Android applications.
Drawing GS1-128 In Objective-C
Using Barcode creation for iPhone Control to generate, create EAN / UCC - 13 image in iPhone applications.
Paint USS-128 In C#
Using Barcode printer for .NET framework Control to generate, create UCC.EAN - 128 image in .NET framework applications.
Create Code128 In None
Using Barcode generator for Excel Control to generate, create Code 128 Code Set A image in Microsoft Excel applications.
Generate GS1 DataBar In Java
Using Barcode maker for Java Control to generate, create GS1 DataBar Truncated image in Java applications.
Bar Code Encoder In Java
Using Barcode encoder for Java Control to generate, create bar code image in Java applications.
Code 3 Of 9 Creator In .NET Framework
Using Barcode generator for .NET Control to generate, create Code39 image in Visual Studio .NET applications.
Copyright © OnBarcode.com . All rights reserved.