Comprehensive testing of WCDMA base stations and solutions-WCDMA, 3G, mobile com
Emergence and development of new technologies will inevitably lead testing technology. In the test industry, when new technologies early, because the relevant technology is not yet finalized, this stage is necessarily a universal instrument technology, the main task of the completion of related tests. However, to a certain stage of development of new technologies, technology is relatively stable, the basic stereotypes associated test specifications after the birth of the appropriate special instrument bound.
Present, 3G Mobile Communications technology Steady development, research and development in the field of 3G base stations, currently used primarily for RF test solutions, in real LMT RNC or the support of manufacturers, using two to three separate devices (in practice will require more instrumentation) and accompanied by peripheral devices (attenuator, coupler, etc.) set up the test system to complete. Testing process, not only to make the test fully consistent with 3GPP25.141 on the test conditions (test with different organizations, different channel requirements) requirements, but also the cooperation between various instruments (such as synchronization, etc.), in addition to care to the attenuator and coupler as peripheral devices such as the introduction of the test result in the loss of precision and accuracy. While this approach will result in a lot of trouble, but because the test solution to facilitate the expansion of white-box testing, more suitable for research and development in the area of the base station, it is still being used in the field of research and development base.
Base of research and development area was the need to build devices using discrete RF test systems, in addition to white-box testing needs, also had to do this, because currently there is no instrument which can cover most of the independent radio base stations test item.
Commercial instruments currently on the market, mainly by installing some options to achieve universal transmitter testing instruments, these instruments is very good, but they will eventually be universal instrument, the provisions of the test items from 3GPP25.141 of view, only can cover a small test project 3GPP25.141 specifications. For example, they can not support the base station receiver test, test projects in the base station transmitter, only partially supported. Testing process, there are also some problems require special handling, such as synchronization problems, instrument and base station test the connection (with attenuator and coupler, etc.), and the lack LMT RNC and the testing support can not be achieved. Finally, the use of discrete devices set up RF test system, If you want to automate testing, there are many difficulties.
These tests, once out of the door to the base station manufacturer, as operations are very complicated and time-consuming and human resources, test precision and accuracy is difficult to guarantee, but constrained by external conditions (RNC or the manufacturers need real support LMT) difficult to achieve automated testing, the inconvenience to emerge.
Dedicated base station market Tester Demand table
Base stations or test the quality of supervisor (if relevant national laboratory), or the base station users (eg operators), but also the need for base station testing. These groups do not care about how the research and development base station is out, do not care about the white box testing the base station. They only care about a fixed number of base stations, a number of performance indicators, only concerned about black box testing base stations, which are a fixed number of base stations from 3GPP25.141 performance specifications.
These groups are very concerned about the independence and convenience of testing, the aforementioned test method in the need for real support RNC LMT or manufacturers, and test processes so cumbersome and time-consuming features, not convenient. Visible, copy the base station areas of research and development test solutions, is clearly inappropriate. In addition, this group is more eager to automated testing, if a simple operation, you can auto complete the test base station will be able to significantly reduce the workload and improve efficiency.
National Laboratory engineers are experts in instruments, so that they can use in the laboratory two or three general-purpose instrument build a base station test system is highly competent. Although the test somewhat cumbersome, but also the support of the base station manufacturer, but he still can stand it. But in the areas of operation and maintenance of the base station, the test method mean big trouble.
We are high quality suppliers, our products such as 830nm diode laser module , 915nm Diode Laser K91SA2F-20.00W for oversee buyer. To know more, please visits red diode laser module.
Processing your request, Please wait....
