[问答]

如何使用外部TTL脉冲作为触发器锁相33522B和33622A

问答对人有帮助，内容完整，我也想知道答案 0 大家好，我试图从两个是德科技功能发生器（33522B，33622A）锁相三个输出通道。 33522B用作主设备（使用1个输出），33622A是从设备（使用两个输出）。到目前为止，我已经使用了此视频中提供的方法：https：//*？v = Windows2ohMS7SZ8＆amp; index = 10＆amp; list = PL2XuMA5AwNUw5ZgOG3N7fNxui72wpI3nL。在这种方法中，一个设备用作主设备，第二个设备是从设备。两个器件都连接到相同的10MHz参考信号。此外，主机和从机通过连接其EXT TRIG输入的BNC电缆相互连接。所有输出均以“突发模式”运行，循环次数无限。从机的输出通道正在等待外部触发（ - >触发模式设置为“EXT”），主机的输出通道等待手动触发。手动触发可以通过按下主控制器前面板上的“触发”按钮（33522B）或通过计算机发送软件触发来给出。在这两种情况下，主设备都会向从设备发送触发TTL脉冲。这种触发方式提供了三个彼此锁相的输出信号。我现在的问题如下。我想使用外部TTL脉冲来触发两个函数发生器的输出。为此，我将所有输出通道设置为触发模式“EXT”（即所有输出通道都在等待TTL触发脉冲），并将两个函数发生器的EXT TRIG输入连接到外部触发脉冲。如果我现在发送触发脉冲，两个函数发生器将开始发送信号。到现在为止还挺好。然而，我发现三个输出信号可以具有不同的相对相位，即使我指定每个信号的相位偏移为零度。此外，当我再次触发输出时，三个信号的相对相位也会改变。总之，我正在寻找一种通过使用外部TTL脉冲对两个函数发生器进行相位锁定的方法。现在，我可以触发两个发生器，使它们同时启动所需信号的输出。然而，所创建的信号的相对相位是1）不可再现的，并且2）不对应于在配置“突发模式”时我要求的值。谁能帮我吗？最好的阿恩以上来自于谷歌翻译以下为原文 Hi all, I am trying to phase-lock three output channels from two Keysight function generators (33522B, 33622A). The 33522B serves as the master (1 output used) and the 33622A is the slave (two outputs are used). So far I have used the approach presented in this video: https://*?v=OW2ohMS7SZ8&index=10&list=PL2XuMA5AwNUw5ZgOG3N7fNxui72wpI3nL. In this approach, one device serves as master, the second device is the slave. Both devices are connected to the same 10MHz reference signal. In addition, master and slave are linked to each other via a BNC cable that connects their EXT TRIG inputs. All outputs are run in "burst mode" with an infinite amount of cycles. The slave's output channels are waiting for an external trigger (--> trigger mode is set to "EXT") and the master's output channel waits for a manual trigger. The manual trigger can either be given by pressing the "Trigger" button at the front panel of the master (33522B) or by sending a software trigger via a computer. In both cases, the master sends a trigger TTL pulse to the slave. This way of triggering gives three output signals that are phase-locked to each other. My question is now the following. I would like to use an external TTL pulse to trigger the output of both function generators. To do so, I set all output channels to trigger mode "EXT" (i.e. all output channels are waiting for a TTL trigger pulse) and connected the EXT TRIG inputs of the two function generators to my external trigger pulse. If I now send the trigger pulse, the two function generators will start delivering a signal. So far so good. However, I discovered that the three output signals can have varying relative phases, even though I specified the phase offset of each signal to be of zero degrees. Moreover, the relative phases of the three signals will also change when I trigger the output another time. In conclusion, I am looking for a method to phase-lock two function generators by using an external TTL pulse. Right now, I can trigger the two generators such that they start the output of the desired signal at the same time. The relative phases of the created signals are however 1) not reproducible and 2) do not correspond to the values I asked for when configuring "burst mode". Can anyone help me out? Best Arne 0
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答案对人有帮助，有参考价值 0 嗨，Arne，为了防止发送外部脉冲后发生器漂移，你需要将所有时钟连接在一起。请按照视频说明连接时钟 - 您可以使用一个设备作为主时钟，也可以使用外部10 MHz参考。当在无限脉冲串模式下全部外部触发时，所有三个发生器应具有指定的相位参考。我遇到的最常见的问题是其中一个单位已经开始无限爆发 - 通常是因为无限爆发开始然后触发源设置为外部，但有时可能是发生器看到尖峰在建立连接时触发输入。如果示波器设置为在“其他”设备上触发，则两个发生器似乎都处于关闭状态，但实际上示波器并未向您显示一个设备实际正在运行而另一个设备正在等待触发。当第二个单元最终获得触发时，示波器也会被触发并显示两个通道，看起来它们是随机启动的。尝试检查两个单元是否在等待触发器或在示波器上切换触发源以确保两个单元实际等待。最诚挚的问候，谢丽尔以上来自于谷歌翻译以下为原文 Hi, Arne, To keep the generators from drifting after you have sent the external pulse, you will want to connect all of their clocks together. Please follow the video instructions for connecting the clocks -- you can either use one unit to be the Master clock or you can use an external 10 MHz reference. All three generators should have the designated phase reference when they are all externally triggered in infinite burst mode. The most common problem I come across is that one of the units has already started its infinite burst -- usually because the infinite burst is started and then the trigger source is set to external, but sometimes it can be that the generator sees a spike on the trigger input while the connections are being made. If your oscilloscope is set to trigger on the "other" unit, it may seem like both generators are off, but really your oscilloscope isn't showing you that one unit is actually running while the other is waiting for the trigger. When the second unit finally does get a trigger, the oscilloscope is also triggered and shows you both channels and it seems like they started up randomly. Try checking that both units are waiting for the trigger or switch the trigger source on the scope to make sure both units are actually waiting. Best Regards, Cheryl

2018-10-22 16:40:26 评论举报刘丰标