如何在C中将E4402B频谱分析仪的屏幕截图发送到PC

Hi GaoGaiGar，即使在在线编程手册中，实际可用代码的示例也有点薄弱。
有一些在这里，你会觉得非常有用：[http://www.keysight.com/main/editorial.jspx?cc=GB&lc=eng&ckey=407788&nid=-33932.710346.02&id=407788&cmpid
= 94444]。
附件是VEE的解决方案，你也可能觉得有用。
如前所述，这使用Direct IO对象，并以二进制块格式请求屏幕图像数据。
当我键入SCPI命令时，使用VISA助手（在IO事务窗口上有一个方便的“显示C代码”选项）：*：MMEM：DATA？
'C： TEST.GIF'*我可以看到它生成了等效的C代码：char buf  [32768 ];
int bufLength = sizeof（buf）;
viQueryf（vi，“mmem：data？'C： TEST.GIF' n”，“％＃t”，＆amp; bufLength，buf）;
buf [] = {“＃520638GIF87a€à÷”};
bufLength = 20646;
我想这在C＃中会是类似的。
注意：注意区分大小写的文件名（分析器可能会将小写文件名转换为大写）。
我希望这有帮助。
此致Simon Coleby.Edited：simon_coleby于2015年10月21日上午10:38



     以下为原文

  Hi GaoGaiGar,

Examples of actual useable code are a bit thin on the ground, even in the online programming manuals.
There are some here you might find useful: [http://www.keysight.com/main/editorial.jspx?cc=GB&lc=eng&ckey=407788&nid=-33932.710346.02&id=407788&cmpid=94444].

Attached is a solution in VEE you may also find useful. This uses a Direct IO object, and requests screen image data in the Binary Block format, as you mentioned.
Using VISA assistant (which has a handy 'Show C code' option on IO transaction window), when I type the SCPI command:

    *:MMEM:DATA? 'C:TEST.GIF'*

I can see it generate the equivalent C code:

   char buf[32768];
   int bufLength = sizeof(buf);
   viQueryf(vi,"mmem:data? 'C:TEST.GIF'n","%#t", &bufLength, buf);
     buf[] = {"#520638GIF87a€ à ÷"};
     bufLength = 20646;

I imagine this would be similar in C#.
Note: Watch out for case sensitive filenames (analyser may convert lower case file names to upper case).

I hope this helps.
Regards, Simon Coleby.

Edited by: simon_coleby on Oct 21, 2015 10:38 AM

附件

• SA_ScreenCapture.vee18.0 KB
  

感谢您的帮助simon_coleby。
我刚刚决定调用使用C＃截取屏幕截图的exe文件，但会尝试你的建议。
谢谢。编辑：GaoGaiGar于2015年10月21日下午2:42



     以下为原文

  Thank you for the help simon_coleby.
I just decided to call the exe file that takes a screenshot using C# for now but will try your suggestions.
Thanks.

Edited by: GaoGaiGar on Oct 21, 2015 2:42 PM