The conforming requirements of cell phone jammer are not hard to be achieved

There is also a stage similar to the Microsoft True Test of ? test simulation by a number of non-professional mobile users to carry out the trial, a phase of trying to find the BUG. The following need to introduce, is the phone number of the software system test phase components. Software product development, system testing as a part of the project must have a test plan. Plan developed by the test manager, reference text file for the entire product development plans. Which defines the following information: test task: test do not need to test what and what; Effort Estimation: How many people, how many days of testing, test a few cycles; schedule: what needs to be done per day. The conforming requirements of cell phone jammer are not hard to be achieved.
Test methods and processes: in what way, what processes to follow; test resources: the need for many people, equipment, tools, documentation and other resources, as well as what are the resource requirements. Test output: test error report to be completed (Error Report) and the progress report (Progress Report), to be completed after the test summary report (Summary Report). Test plan will guide the entire test program, defines the rules that all test activities, the most important. We mentioned in the first part, for the phone's various functions concerned, there is always a document to describe it. This document is usually called "software features" (Software Specification) or "software requirements specification" (Software Requirement), but this text file is written in language development language rather than written tests. How to distinguish between these two languages, see the following example.
Time-domain measurement system commonly used in the pulse signal, the measurement parameters include pulse rise / fall time, pulse repetition interval, on / off time, the error interval and so on. The traditional method is to measure the signal with an oscilloscope to observe the time-domain waveform. And we can use vector signal analyzer will move the input signal into the baseband after the sampling phase component I and quadrature components Q. Extent we can - over time, phase - the time or I / Q polar coordinate system to represent the other two components. Scanner is used to show the magnitude of the signal in the time domain, ie the envelope of the RF signal. For the TDMA technology for time-domain analysis is particularly important, so the pulse waveform and timing of testing in the GSM mobile phone is essential parameters. The cell phone jammer factory has improved the technology to reduce the rework rate of cell phone jammer .
Phone frequency domain measurements are usually divided into Spectrum due to modulation and wideband noise testing and Spectrum due to switching test. Spectrum due to modulation and wideband noise test is to ensure that the spectrum modulation process does not result in excessive communication. If spread over the spectrum, then the mobile phone work in other bands will be subject to noise interference. This test is also to some extent be regarded as adjacent channel power measurement. We pass this test can detect the signal transmission process, such as I / Q baseband signal generator, filters and modulators on the issue at all levels.
Channel power is within the frequency bandwidth of the signal average power, which is the basic communication system parameters. In the wireless communication system, we use the smallest possible power to achieve the best possible communication links. This not only helps to keep the entire system to a minimum level of interference, the base station can maximize battery life.