Boundary value analysis is listed unit features input, status and control legal and illegal border value of the boundary value, design test cases, including all of the boundary value method. Typically include the IF statement in the discriminant value, domain, range boundary, empty or malformed input, the end of the controlled status. Boundary value analysis is not to find an example of a class method, but the handling of the situation along the border as the main objective of specially designed test methods. In addition, boundary value analysis not only to examine the value of the input side, but also consider the value of the output side. This is derived from people's experience is an effective way. It found that many software errors is the next standard, data structures and scalar boundary value and its upper and lower there, run the test cases found in this area a high probability of error. Cellular Phone Jammer of different brands will be exhibited in the trade fair.
If the provisions of a range of input conditions, or provides the number of values should be within the boundaries of that range and just outside the boundary out of range values, or were the maximum, minimum, and slightly less than the minimum, slightly greater than the maximum number as a test case. If norms "of a file can contain l to 255" records", then the optional test cases 1 and 255 and 0 and 256, etc. Each output conditions for use of standard principles of [a] If the program specifications mentioned to the input or output field is an ordered collection (such as order documents, forms, etc.) should pay attention to select the ordered set of the first and last element as a test case analysis specifications, possible to identify the possible boundary conditions a A typical example is the boundary value analysis of the triangle classification program. select a, b, c form sides of a triangle, "any two sides is greater than the third side" of the boundary conditions the same price class of boundary value analysis into different emphasis on the equivalence class division is a supplement, such as the triangle problem, select a = 3, b = 4, c = 5, a = 2, b = 4, c = 7 is covered valid and invalid equivalence classes. The strength of   cell phone jammer  can be adjusted manually.
If you can inject into the equivalence class of boundary value analysis ideas. In each equivalence class in the use cases not only select a cover, but then select the equivalence class of boundary value equivalence class partition method will be more effective and last boundary value analysis can be used to add some test cases. Mistaken rule of thumb method is largely carried out, is made in the past with people's analysis of the results of testing, revealed deficiencies on the regularity for the intuitive guess to find defects. A dichotomy search using the program, typically you can list the following types of test cases: only one table being retrieved or is empty table; number of entries in the table is exactly a power of 2; Table 2 the number of items than a power of more than 1 and so on. Different customers need different strength of  mobile phone jammer.
Mistaken method full human experience, in a test group brainstorming, convenient and practical, especially in poor foundation in software testing in the case, well organized test group (you can also have external personnel) Error guessing, is effective test methods. The argument is that the test case random numbers. It can automatically generate, so the high degree of automation. A large number of random test cases using test procedures will improve user confidence in the process. But the key is whether the law of random numbers use the actual. The failure is also common faults. It involves a larger number of units. When the receiver, transmitter, frequency synthesizer, BB processing, CPU, software problems, will cause such failures. The antenna contact is good? Approach: use of anhydrous alcohol to clean, correct antenna reed. Check the RF and IF frequency synthesizers, RFVCO, IFVCO operating voltage? Whether there Weld? Check the receiver front-end LNA (low noise amplifier) operating point? Whether Weld? Different customers have different requirements for  cell phone jammer. Check RFSAW or IFSAW performance without deterioration? Whether Weld? Available 100P of the capacitor connected across it a try. Check RFIC operating voltage? Whether Weld? Check I / Q quadrature MODEM operating voltage is normal? Generally normal to: DC1.2V so, single-ended AC500mVpp so. Check the BB processing unit voltage? Whether Weld? Check transmitter VCO, PA, MOS switch, APC control circuit is a problem? Whether Weld? This is a typical point of failure. For earlier models, needs to check the connectors between the RF and BB without Weld? Welding CPU, re-write software. The customer should tell us the special requirement towards  cell phone jammer.