摘要： Frequency Accuracy SpecificationFor IEEE 802.11a 17.3.9.4 ± 20ppm MaximumFor IEEE 802.11b 18.4.7.4± 25ppm Maximum (± 60kHz)For IEEE 802.11g 19.4.7.2± 阅读全文

摘要： 1layout 2导出Gerber 做钢网 3刷锡膏 4.1调SMT程序： a摆元件，写P/N位置 b定位检测点 4.2手贴元件 手别抖！ 5过炉 温度270 6插件PCBA 做载板最方便，手插焊接也行，会有焊接上锡痕迹 7组装 加散热片 和机械物料 8烧录 用电脑烧录 9调试 做功能调试 阅读全文

摘要： More than 90 percent of China's office workers consider on-the-job training and continuing education to be essential in improving their capabilities a 阅读全文