AWG and UXR 宽带数字调制信号生成与解调

[{"attributes":{"bold":true},"insert":"测试系统组成："},{"insert":"\nAWG: M8195A 宽带数字调制信号生成\nUXR: UXR0504A 示波器，宽带数字调制信号解调\nVSA：89601C VSA解调分析软件\n路由器/交换机 一个\nPC一台（安装有IQtools和89601C，IO library）\n"},{"attributes":{"bold":true},"insert":"系统搭建："},{"insert":"\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/4623e7e9f2270d18.png"}},{"insert":"\n1.AWG,UXR,PC三台设备的IP设置在同一网段内，通过路由器连接。\n实际场景如下图：\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/36af1c4d067a90d0.png"}},{"insert":"\n1.在PC上打开IO Library，找到AWG M8195A和示波器 UXR0504A\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/ea3d9e81da70b33b.png"}},{"insert":"\n2. 打开IQTools软件，配置仪器（在IO Library里可以看到VISA地址）\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/05b43fb0534eafce.png"}},{"insert":"\n  VSA的地址可以在VSA软件里找到（Utilities---SCPI Preferences--Status）\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/96365c438ae19b15.png"}},{"insert":"\n3. VSA 软件需要连上示波器UXR0504A\n      Utilities---hardware--discovered Instruments里找到示波器\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/b2f818a8b1596a15.png"}},{"insert":"\n Hardware添加新的Analyzer2\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/cc8e8a89e916fa67.png"}},{"insert":"\nUtilities---Hardware--Analyzer2 连上示波器\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/4a356a533872b7f0.png"}},{"insert":"\n4. 打开IQtools设置数字调制信号\n      Symbol rate :4GS/s  Modulation:QPSK\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/00bc5880d2ad5e50.png"}},{"insert":"\n 下载到AWG播放(download)，并自动设置VSA(Setup VSA)，通过示波器解调信号\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/d8f98e8df41788fb.png"}},{"insert":"\nVSA显示解调结果(EVM 8.6%,效果差)\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/7df9a80d41f61947.png"}},{"insert":"\n 解调效果差的原因是AWG信号路径未经过校准\n5. AWG信号路径校准\n      VSA断开示波器连接，示波器UXR0504A恢复默认设置。点击 show correction，进入校准界面，选择In-System Calibration\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/9bde8c25ae62566d.png"}},{"insert":"\n设置好AWG和UXR对应通道路径，点击run运行校准\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/a74ea62af1900a85.png"}},{"insert":"\n 覆盖校准数据\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/912bf3c52bf8b4f9.png"}},{"insert":"\n关闭校准界面，回到数字调制界面，勾选apply correction，点击download下载播放并再一次Setup VSA\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/66b6f92e3965b7c6.png"}},{"insert":"\n此时，可以看到EVM值由8.6%变成了1.5%\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/800b3258e551b675.png"}},{"insert":"\n点击Re-Calibrate可以进一步改善EVM到1.3%\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/a3ab46f1226c50e8.png"}},{"insert":"\n6. 调制方式有QPSK变成256QAM,download到AWG播放，并Setup VSA，\t可以看到解调结果 EVM值0.9%\n"},{"insert":{"image":"https://community-1252773949.cos.ap-guangzhou.myqcloud.com/2033/1ee346ea4f6417b9.png"}},{"insert":"\n\n"}]