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我们的一位客户要求测试从10 KHz到6 GHz的差分放大器。
具有iTMSA的PNA对此无效，因为低端为10 MHz，并且具有此多倍频程跨度的混合不可实现。 我想我可以将两个EXG与选项012（相位相干）结合在一起，但这似乎仅限于文献中矢量调制器的BW。 不清楚。 似乎将两个EXG与10 MHz参考输入相关联将不会保持相干相位关系，而只是频率锁定。 那是对的吗？ 可以通过两个矢量EXG实现相位相干的10 KHz到6 GHz的扫描，从而在2个单元的输出之间提供所需的正交关系吗？ 如果选项12不适用于此目的，是否有办法将两个矢量或模拟类型的EXG相关联以实现此正交关系扫描行为？ 作为一个相关的问题，如果可以建立这种正交关系，是否可以用任何相干相位关系扫描？ 谢谢 ！ 以上来自于谷歌翻译 以下为原文 One of our customers requests a way to test a Differential Amplifier from 10 KHz to 6 GHz. PNA with iTMSA is not valid for this as the lower-end is 10 MHz and a Hybrid with this multi-octave span is not realizable. I was thinking I could tie two EXG's together with Option 012 (Phase Coherency) but this appears to be confined to the BW of the vector modulator from the literature. Not clear. It does seem that associating the two EXG's with the 10 MHz reference input would not maintain a coherent phase relationship, instead only frequency locking. Is that correct? Can a sweep from 10 KHz to 6 GHz with two vector EXG's made phase coherent be accomplished that provides the desired quadrature relationship between the 2 unit's outputs? If Option 12 is not suitable for this purpose, is there a way to associate two EXG's of either vector or analog type to accomplish this quadrature-relationship swept behavior? As an associated question, if this quadrature relationship can be established, would it be possible to sweep with any coherent phase relationship? Thanks ! 
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6个回答
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您最简单的解决方案是将单端发生器转换为带平衡 - 不平衡转换器电路的平衡输出。
这将变为差分输出。 网上有几篇关于它的论文。 以上来自于谷歌翻译 以下为原文 Your simplest solution would be to convert your single ended generator to a balance output with a balun circuit. This will change to a differential output. There are several papers on the web about it. |
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混合是巴伦的一种形式，通常用于高频微波目的。 我不能像第一篇文章中提到的那样使用Hybrid / Balun方法，因为具有此BW的Hybrid / Balun似乎没有商业化，并且可能无法实现。 在10KHz和大约10MHz之间使用的构造技术与在10MHz和大约500MHz之间使用的构造技术显着不同，然后在500MHz和大约6GHz之间，技术再次变化。 如果您知道10 KHz到6 GHz Balun / Hybrid，请指向供应商。 如果您不知道在哪里获得Balun / Hybrid以使您的建议可行，请回答我关于EXG功能的问题。 MCD信号发生器的好处是它们确实涵盖了这个频率范围，但10 MHz参考频率锁定不会产生相对相位相干输出。 这就是我询问Phase Coherency选项功能的原因。 目前尚不清楚相干性是否发生在内部调制能力的BW之外。 以上来自于谷歌翻译 以下为原文 A Hybrid is one form of a Balun, one normally used for higher-frequency microwave purposes. I can't use the Hybrid/Balun approach, as I mentioned in the first posting, because a Hybrid/Balun with this BW does not appear to be commercially available, and is probably not realizable. The construction technologies used between 10 KHz and about 10 MHz are dramatically different than those used between 10 MHz and about 500 MHz and then between 500 MHz and about 6 GHz the technologies change again. If you know of a 10 KHz to 6 GHz Balun/Hybrid, please point me to the vendor. If you do not know where to obtain a Balun/Hybrid to make your recommendation viable, please answer my questions regarding the EXG functionality. The benefit of the MCD signal generators is they do cover this frequency range, but 10 MHz reference frequency-locking does not produce relative phase-coherent output. This is why I asked about the functionality of the Phase Coherency option. It is not clear that the coherency occurs outside the BW of the internal modulation capability. |
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cmh13 发表于 2019-2-26 18:56 嗨 - 两个问题：1。您是否需要2个EXG来生成CW波形或调制为ON？ EXG的矢量模式最低频率为5MHz，不能为9kHz。 2.你需要2个EXG从10kHz扫描到6GHz以及相位相干吗？ 你的答案可以帮助我 - 帮助你问候 - 以上来自于谷歌翻译 以下为原文 Hi - Two questions: 1. Do you need 2 EXG to generate CW waveform or with modulation ON? The EXG’s lowest frequency for vector mode is 5MHz, could not be 9kHz. 2. Do you need 2 EXG to sweep from 10kHz to 6GHz together with phase coherency? Your answers may help me - help you Regards - |
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醉狼工作室 发表于 2019-2-26 19:12 答案按顺序1）如第一条消息中所述，我可以使用模拟EXG，因此不需要调制。 只有CW音。 2）正确，10 KHz至6 GHz，具有相位相干性。 因此，要预测EXG可能具有的任何限制=如果存在可以实现相位一致性的较窄跨度，则了解工作范围的开始/停止将是有价值的。 相位关系需要由用户设置。 正交关系是最小的，如果提供的是正交，那么相位（度）的增量是多少？ 我们假设在整个跨度内保持恒定的振幅，这是正确的吗？ 以上来自于谷歌翻译 以下为原文 Answers in order 1) As mentioned in the first message, I can use an Analog EXG, so modulation is not needed. CW tone only. 2) Correct, 10 KHz to 6 GHz with Phase Coherency. So to anticipate any limitations the EXG's may have = If there is a narrower span where phase coherency can be accomplished, it would be valuable to know the start/stop of the working span. The phase relationship needs to be set by the user. Quadrature relationship is the minimum and if more than quadrature is provided what would be the increment in phase (degrees)? We presume that constant amplitude would be maintained across the span, is this correct? |
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您好，1。模拟EXG没有相位一致性选项，因此需要矢量EXG。 2.矢量EXG的相位相干选项可支持250MHz-6GHz频率，不低至10KHz。 3.两个EXG之间的相位关系可以设置为±360.00°。 4.幅度在整个范围内可以保持不变。 谢谢 以上来自于谷歌翻译 以下为原文 Hi there, 1. Analog EXG doesn't have phase coherency option so vector EXG is needed. 2. Vector EXG's phase coherency option could support 250MHz-6GHz frequency, not as low as 10KHz. 3. Phase relationship between two EXG could be ± 360.00 ° settable. 4. Amplitude could be constant across the span. thanks |
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究竟什么是阻止相干跟踪在250 MHz以下工作的机制？
像250 MHz以下的矢量调制器中的相位差异？ 或未校准的矢量输出组件低于250 MHz？ 我需要能够向我的AE同事解释这个问题，以便我们继续研究另一个CTD解决方案，我们会有更多这些要求出现。 以上来自于谷歌翻译 以下为原文 What exactly is the mechanism that prevents the coherent tracking from operating below 250 MHz? Something like phase abberations in the vector modulator below 250 MHz? Or uncalibrated vector output components below 250 MHz? I need to be able to explain the issue to my AE colleagues so we can move on to another CTD solution, we have more of these requirements emerging. |
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