M8190A+E8267D产生宽带信号及校准

[{"insert":"E8267D+M8190A连接示意图：\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/06937f6ccba7cb03.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"E8267D接口在背面板，下图"},{"attributes":{"color":"#ff0000"},"insert":"红色"},{"insert":"（"},{"attributes":{"color":"#ff0000"},"insert":"I OUT，I-bar OUT"},{"insert":"）和"},{"attributes":{"color":"#4472c4"},"insert":"蓝色"},{"insert":"线（"},{"attributes":{"color":"#4472c4"},"insert":"Q OUT，Q-bar OUT"},{"insert":"）\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/15fdb080ef835a19.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":" \nE8267D要求：016  wideband选件\n设置：仪表面板上的I/Q按键，打开I/Q on，选择I/Q路径为外部背面板输入：\n频率输入为需要的载波频率；\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/94032153225d661d.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"M8190A设置：\nIQ tools中设置外部上变频之后的频率（载波频率）\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/d04c61d1456b6861.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"以1G symbol rate，0.35 滚降系数 ，QPSK调制模式为例：VSA解调结果如下：\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/e25bf63547f0b766.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"M8190A 宽带信号校准\n1. 先设置宽带调制信号\n2. Download\n3. 直接使用VSA校准，即可得到校准之后的宽带信号；\n"},{"insert":{"image":"https://files.eteforum.com/article/202302/9c72ec81fc2bc8b2.png"}},{"insert":{"image":"https://files.eteforum.com/article/202302/5571b0a534d18909.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":" \n先清除之前的校准数据，再使用in-system cal\n \n校准完成之后，可以看出EVM从原来的10%改善到2.5%。\n\n——作者 君鉴科技/杨云刚"},{"attributes":{"align":"right"},"insert":"\n"}]