Test Pattern

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test pattern

[′test ‚päd·ərn]
(communications)
A chart having various combinations of lines, squares, circles, and graduated shading, transmitted from time to time by a television station to check definition, linearity, and contrast for the complete system from camera to receiver. Also known as resolution chart.

Test Pattern

 

a slide on which a standard pattern is drawn; it is used for quantitative evaluation of the resolving power of optical instruments, particularly lenses. A test pattern may have various configurations and different degrees of contrast of its elements. The elements often are dark lines on a light background or alternating dark and light sectors. The density of the lines in different parts of the pattern changes, increasing from top to bottom and from left to right.

By observing the image of the test pattern that is produced by an optical instrument, it is possible to determine for which element of the image the individual lines cease to be distinguishable (merge), which directly gives the maximum resolving power of the instrument in numbers of lines N per millimeter (or, by known conversion formulas, in angular seconds ψ and in milli-meters δ).

References in periodicals archive ?
-- Support Verification and Validate (V&V) test patterns
Our idea is to apply graphical analysis on FSM to generate test patterns for fuzzing automatically.
The cycle, which analyses all test patterns include lines from 2 to 8.
The fault coverage of the SBST test is primarily affected by the test patterns. One of the ways to obtain test patterns is to run ATPG.
Case Item Case 1 (cm) Case 2 (cm) Training patterns BPNN 2.026 x [10.sup.-18] 5.845 x [10.sup.-21] Regression 0.0887 4.14 x [10.sup.-27] Test patterns BPNN 0.0462 0.1406 Regression 0.178 0.112 Case Item Case 3 (cm) Case 4 (cm) Training patterns BPNN 8.067 x [10.sup.-21] 1.338 x [10.sup.-21] Regression 8.84 x [10.sup.-26] 1.73 x [10.sup.-27] Test patterns BPNN 3.227 0.013 Regression 3.411 0.046 Case Item Average MSE (cm) Training patterns BPNN 5.103 x [10.sup.-19] Regression 0.02218 Test patterns BPNN 0.8567 Regression 0.9368 Table 4: MSE of time duration by BPNN and regression analysis.
For low-level diagnosis purposes, the modules are represented by sets of local test patterns, which are treated as conditions for activating physical defects in modules.
STIL (Standard Test Interface Language) and WGL (Waveform Generation Language) are industry-standard languages used by Automatic Test Program Generators (ATPG) and Design for Test (DFT) tools to specify test patterns for IC devices.
P25/NXDN Tx measurements that can be made are received power, frequency error, modulation fidelity, symbol deviation, NAC and BER for 1011 Hz and 0.153 test patterns. BER estimation from voice traffic and BER/MER measurements from control channel traffic can also be performed.
Written primarily for .NET developers who need to master the concepts of unit testing, this manual covers both basic and advanced tests that are "maintainable, readable and trustworthy." Osherove is a chief architect at Typemock, and he provides step-by-step instructions for dealing with advance test patterns and organization, legacy code, untestable code, mock objects, stubs and automated frameworks such as Typemock Isolator and Rhino Mocks.
(5) Fault simulation to generate training and test patterns.
Pseudoexhaustive testing achieves many of the benefits of exhaustive testing but usually requires far fewer test patterns (Abramovici et al., 1996).
A simple menu guides users through advanced scaling selections including noise reduction, detail enhancements, frame rate conversions, test patterns, color corrections and custom timing outputs.