OTA test literacy (bought for 8 rd) OTA test introduction OTA test method YD OTA standard OTA case analysis OTA test introduction Purpose: to verify the connection ability of wireless equipment and network and the impact of terminal users on radiation and reception performance. Perform spatial three-dimensional testing to test radiation power and reception sensitivity. For each aspect of the test, both free space and human head model tests are required. If the antenna is retractable, the antenna must also be tested in both the extended and retracted states. OTA test introductionTest system path requirementsAnechoic chamber performance test CTIA OTA test system meets far-field condition ripple test, with a total uncertainty of less than 2dB. High-precision three-dimensional positioning device meets CTIA OTA requirements for free space and human head model testing Positioning system and EUT support must be electromagnetic wave transparent materials CTIA OTA test systemNetwork Analyzer Multi-Axis Positioning System (MAPS) Spectrum Analyzer Universal Radio Communication Tester Relay Switch Unit Windows based PC running test software RF Cables Diagonal Dual Polarized HornAntenna Under Test (AUT)WalkwayGPIBBusFiber Optics for MAPS system MAPS ControllerPenetratio n Panel CTIA OTA test system+ZPhi Polarization +Z Theta Polarization-X(To MA )-XY +X+Y-Yta (The) Axis+YZZ(Phi Axis)+X Test system Test system CTIA OTA test……
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