关于Ipod (苹果公司)内部专业资料英语，需要帮忙翻译,尤其第四条:
1) USB loopback - USB verification provisions are included in the "Factory Test" routine and requires an USB A-B cable connected from the Loopback Test Board USB-A connector to the HDD2 board USB-B data connector.
2) S-Video Input at the iPod Connector - The 30-pin iPod connector includes a S-Video Input which is not tested. The "Factory Test" routine includes a pass-through test for Composit Video, S-Video and Audio. The S-Video portion of the test can be accomplished by inputting a video signal on the S-Video jack of the 30-pin loopback board, and verifying S-Video output from the unit under test.
3) "iPod Detect" line verification - The iPod detect function of the dock should be tested. Provisions to automatically test this function are included in the Factory Test routine.
4) iPod Charging Voltage Verification - The Loopback Test Board board includes provisions for a 2.5W load and voltage detect circuit to verify that the Dock can provide full charging current to an iPod. The necessary components (10-Ohm 5W Resistor, LED etc.,) should be added to the Loopback Test boards to incorporate this test.
參考答案:1) 万用串列总线 loopback- 万用串列总线确认准备被包含在 " 工厂测试 " 之中常式并且需要一个万用串列总线一-B 电缆从 Loopback 测试董事会万用串列总线连接-对 HDD2 的一个联编者搭乘万用串列总线- B 的数据联编者。
2)S- 录象机在 iPod 联编者的输入 -30个大头针的 iPod 联编者包括 a S-电视的不被测试的输入。 " 工厂测试 " 常式为 Composit 录象机包括一个途径- 经过的测试,S-录象机和声音。 测试的 S- 录象机部分藉由输入在 30个大头针的 loopback 董事会的 S- 录象机插座上的电视信号可能是完成的, 而且查证来自在测试下面的单位 S- 录象机的输出。
3) " iPod 发现 " 线确认 - iPod 发现码头的功能应该被测试。 自动地测试这一个功能的准备被包含在工厂测试常式之中。
4) iPod 要价电压确认 -Loopback 测试董事会董事会为一个 2.5 W 负荷包括准备，而且电压发现线路查证码头能完全地提供要价对 iPod 的涌流。 必需的成份 (10个欧姆的 5 W 电阻,引导了等等,) 应该被增加到 Loopback 测试董事会合并这一个测试。
