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您好，我有一个设置33120A驱动振动样本和33250A控制短光脉冲（约振动周期的1/100）照亮样本。
当我将照明频率偏移到例如1 Hz时，我看到样本显然以预期的1 Hz振荡（真实振荡频率以千赫兹为单位）。 我想要实现的是设置驱动和照明脉冲频率相等并控制信号的相位差，以便在振荡周期的不同阶段对我的样本成像。 我通过10MHz时钟电缆同步了两个发生器。当我手动调整33120A的相位（较新的没有手动菜单选项）时，我看到样品移动对应于我刚刚调整的相位。 我的问题是，当通过GPIB向发生器（任一个）发送PHAS 180.0等命令时，我看不到位置的移动或改变。 GPIB查询“PHAS？” 确认发电机收到了我的命令。这里似乎有什么问题？ 任何想法？Lauri Kangas，芬兰 以上来自于谷歌翻译 以下为原文 Hello, I have a setup with 33120A driving a vibrating specimen and 33250A controlling short light pulses (about 1/100th of the vibration period) illuminating the sample. When I offset the illumination frequency at, say, 1 Hz I see the sample apparently oscillating at 1 Hz as expected (the true oscillation frequency is in the kilohertz scale). What I like to achieve is to set the drive and illumination pulse frequencies equal and control the phase difference of the signals in order to image the my sample at different phases of the oscillation period. I have got the two generators synchronized via the 10MHz clock cable. When I manually adjust the phase of 33120A (the newer one doesn't have a manual menu option) I see the sample moving corresponding to to the phase I just adjusted. My problem is that when sending PHAS 180.0 etc. commands to the generators (either one) via GPIB, I see no movement or change in position. A GPIB query "PHAS?" confirms that the generators received my commands. What seems to be the problem here? Any ideas? Lauri Kangas, Finland 
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4个回答
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您好Lauri，•您可以从前面板调整33250A相位•您参考发电机的对象是什么？
您用来引用0度的外部信号是什么？•您是否在33120A上出现错误？o PHAS命令不是33120A上的有效命令（它位于33210A和33250A上，但不在33120A上）。 你需要使用PHAS：ADJ在33120A instead.oThe PHAS：在33120A ADJ命令是弧度，并且可以-2pi和+二皮之间。 发送180弧度超过这些值。 要以度数指定它，您需要进行PHAS：ADJ 180°。 •如果设备已手动配置为180度，则发送命令PHAS：ADJ（至33120A）或PHAS（在33250A上）180将不会导致任何更改。 在使用PHAS：ADJ或PHAS命令之前，请使用命令PHAS：REF以防止这种情况发生。 以上来自于谷歌翻译 以下为原文 Hi Lauri, • You can adjust the 33250A phase from the front panel • What are you referencing the generators against? What is the external signal you are using to reference 0 degrees? • Are you getting errors on the 33120A? o The PHAS command isn’t a valid command on the 33120A (it is on the 33210A and 33250A but not the 33120A). You Need to use PHAS:ADJ on the 33120A instead. o The PHAS:ADJ command on the 33120A is in radians and can be between -2pi and +2pi. Sending 180 radians exceeds these values. To specify it in degrees you need to do PHAS:ADJ 180 DEG. • If the unit is already at 180 degrees from configuring it manually, sending the command PHAS:ADJ (to the 33120A) or PHAS (on the 33250A) 180 will not result in any change. Use the command PHAS:REF before using the PHAS:ADJ or PHAS command to prevent this from happening. |
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嗨，谢谢你的回复。
我认为这解释了我的问题。 我之前对PHAS与PHAS：ADJ命令确实存在一些混淆。 如果我能用正确的命令成功，我会尝试。还有两个问题：在33250A的前面板上我可以手动调整相位吗？我需要什么样的外部参考来实现两个发生器之间的准确相移 将它们与10MHz时钟连接在一起？Lauri 以上来自于谷歌翻译 以下为原文 Hi and thanks for the reply. I think this explains my problems. I did have some confusion regarding the PHAS vs. PHAS:ADJ commands a while ago. I will try if I'll succeed with the correct commands. Two more questions: Where in the front panel of 33250A can I manually adjust the phase? What kind of external reference would I need to achieve an accurate phase shift between the two generators besides linking them together with the 10MHz clock? Lauri |
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问题解决了。我在33250A前面板上找不到相位菜单，因为当输出设置为脉冲模式时它没有。
我认为这个模式中的阶段即使通过远程接口也无法控制？但是我将命令改为PHAS：ADJ而是将它们发送到控制正弦输出的33120A，现在一切正常！Lauri 以上来自于谷歌翻译 以下为原文 Problem solved. I could not find the phase menu in the 33250A front panel because of it's lacking when the output is set to Pulse mode. I reckon this the phase in this mode isn't controllable even via the remote interface? However I changed my commands to PHAS:ADJ instead and send them to my 33120A controlling the sine output and now everything works fine! Lauri |
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如果打开Burst，则可以调整方波的相位，但不能调整脉冲的相位。
对不起任何困惑，但我很高兴听到你有事情发生。 以上来自于谷歌翻译 以下为原文 If you turn on Burst, you can adjust the phase of a squarewave, but not a pulse. Sorry for any confusion but I'm glad to hear you got things working. |
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