高功率网络分析仪的功率峰值

嗨，我已经配置了8753ES Opt 011（无测试装置）作为高功率网络分析仪。
请参阅附件中的配置。
当使用三项校正模型校准S11时，我发现我在校准基板上炸毁了我的负载标准。
我已将校准功率设置为5 dBm，这些电阻规格为0.25 W（24 dBm）。
然后我用功率传感器替换探头1，看到功率确实是5 dBm，但我看到每个频率扫描开始时出现尖峰。
在短时间内，功率跃升至32 dBm。
我在http://cp.literature.agilent.com/litweb/pdf/5966-3319E.pdf上阅读了优秀的应用笔记AN 1287-6。
第10页讨论了在源预调校准期间分析仪功率可能会出现峰值的一些情况。
这似乎是正在发生的事情，并在校准和测量过程中引起功率峰值。
我尝试在服务菜单中关闭PLL自动调谐，但我仍然看到功率峰值。
我想尝试使用频率偏移模式的第二个建议，但我不确定这需要什么。
这需要第二个信号发生器吗？
我应该尝试哪些其他途径？
我甚至愿意购买一个新的VNA，但我不确定这些是否会阻止破坏性的尖峰。
我也渴望快速进行一些测量。
我能做些什么来防止我手边的设备出现电源尖峰？
谢谢Steve Ortiz



     以下为原文

  Hi,

I've configured a 8753ES Opt 011 (No test set) to be a high power network analyzer.  Please see my configuration in the attached file.

When calibrating S11 with a three term correction model I found I was blowing up my load standards on the calibration substrate.  I had set the calibration power to 5 dBm and these resistors are spec'd to handle 0.25 W (24 dBm).  I then replaced Probe 1 with the power sensor and see the power is indeed 5 dBm, but I see spikes at the beginning of each frequency sweep.  For a short time, the power jumps up to 32 dBm.   

I read the excellent application note AN 1287-6 at: http://cp.literature.agilent.com/litweb/pdf/5966-3319E.pdf.  Page 10 discusses some cases where the power of the analyzer may spike during the source pre-tune calibration.  It seems this is what is happening and causing power spikes during the calibration and measurement.

I tried turing off the PLL Auto tune in the service menu, but I still see the power spikes.  I'd like to try the second suggestion, using frequency-offset mode, but I'm unsure what this requires.  Does this require a second signal generator?

What other paths should I try?  I'm even willing to purchase a new VNA, but I'm unsure these will prevent the damaging spikes.  I'm also eager to get some measurements quickly.  Is there something I can do to prevent the power spikes with the equipment I have on hand?

Thanks,

Steve Ortiz   
附件

• High_Power_Network_Analyzer.pdf140.7 KB