如何设置Local键的回调？

我不认为您可以在转换到本地时生成SRQ。
我能想到的最接近的事情是使用用户定义的密钥来生成SRQ，但是当仪器处于远程时，这将不会处于活动状态，因此您必须首先点击Local然后再调用用户定义的密钥。
这里的缺点是，如果远程程序仍然向仪器发送命令，它可能会在您按下Local键后立即返回远程，因此键盘将保持锁定状态。
因此，这种方法只有在控制器出现某种“中断动作”的情况下才能工作，这样你就可以进入并使用它。
我对此有点生疏，所以你必须尝试一下，但是这里是如何从3458A的前面板生成SRQ（例如HTBasic）：OUTPUT 722;
“DEFKEY 1，'RQS 4;
SRQ'“这将分配命令字符串'RQS 4;
SRQ'到用户定义的密钥1（数字密钥1）。
如果用户在键盘空闲时命中'1'键（没有其他菜单项正在进行中），则会提取已定义的命令字符串，然后用户按Enter键执行它。
“RQS 4”命令是启用SRQ命令以实际生成SRQ所必需的。
当用户完成前面板工作时，此机制可用于生成第二个SRQ，因此控制器必须跟踪它已部署的事件数。
如果有效，请告诉我



     以下为原文

  I don’t think you can generate an SRQ on a transition to Local.  The closest thing I can think of is using a user-defined key to generate an SRQ, but this wouldn’t be active when the instrument is in remote, so you would have to hit Local first and then invoke the user-defined key.  The drawback here is that, if the remote program is still sending commands to the instrument, it will probably go back to remote right after you hit the Local key, so the keyboard will stay locked out.  Thus, this approach will only work if there is some sort of “break in the action” from the controller so you can get in and use it.  I’m a little rusty on this, so you’ll have to try it out, but here’s how to generate an SRQ from the 3458A’s front panel (example is HTBasic):

   OUTPUT 722; “DEFKEY 1, ‘RQS 4; SRQ’”

  This will assign the command string ‘RQS 4; SRQ’ to user defined key 1 (the numeric key 1).  If the user hits the ‘1’ key when the keyboard is idle (no other menu entry in progress), this will pull up the defined command string, and then the user hits Enter to execute it.  The ‘RQS 4’ command is necessary to enable the SRQ command to actually generate the SRQ. 

  This mechanism could be used to generate a second SRQ when the user is done with his front panel work, so the controller will have to keep track of how many events it has fielded.

   Let me know if that works

好的，我会看看。
我怀疑我们最终会告诉他们他们不能这样做。
谢谢，布赖恩



     以下为原文

  Ok, I'll look at that. I suspect we will end up telling them that they can't do that.


Thanks,

Brian