Shielding boxes are shields of various shapes made of conductive or magnetically permeable materials, which limit the electromagnetic capability within a certain spatial range, and are used to suppress radiated metal bodies. Conduction and radiation are processed to achieve Wireless communication equipment to provide equipment without interference test environment.
According to different test requirements, it can be manufactured into manual, pneumatic, fully automatic and other different working modes. The shielding box is divided into three categories. Pneumatic shielded boxes are generally large in size and are used in production tests to improve test efficiency and reduce operator fatigue. Automatically shielded box through the international standard RS232 interface in accordance with the communication instructions to test the shielding box to complete the test process, generally small RF modules used in mass production line production, improve production efficiency. Manually shielded boxes, which are generally small in size and easy to operate, are the most commonly used ones on small-scale communication equipment such as mobile phones and other production lines. In addition, there are also some parts that are too large in size and use manual door-to-door access due to the inconvenience of pneumatic operation.
For manufacturers of wireless communication products, the loss of large output value and profits is caused by the inability of the products to be available on time or quickly. Directly affect the follow-up business and market share expansion. The RF test process is the most complicated and most influential process in the production line of wireless communication equipment such as mobile phones and is also the bottleneck of the production line. RF test stations are usually composed of test instruments, shielding boxes, test software, and other parts, and usually can be divided into calibration test, comprehensive test, antenna test and so on. Due to capacity requirements, the RF test process will be run in parallel by multiple identical test stations. If the passing rate of one or some of the test stations is low and the output is reduced, the bottleneck of the production line and the increase of the production cost will be easily caused. The reasons can be roughly divided into: product design or material reasons, test problems, radio frequency interference and other environmental factors, test uncertainty.
2018-03-27