N9030A频率响应失败

嗨 - N9030A，PXA包含一个内部自动对准程序，可以通过按前面板键手动触发：系统，对齐，全部对齐，现在。
还有SCPI命令来执行此例程。
所有对齐都在仪器加电时自动执行，然后在自动对齐设置为正常时以时间和温度为基础运行。
您将在屏幕上看到一个黄色框，显示对齐进度，您将看到例如“对齐18的45”。
这看起来像你下面提到的SCPI对齐吗？
这种自动校准程序将“调整”（补偿测量值）3 Hz至3.6 GHz信号路径中的各种信号路径增益，以及仪器路径的3.6 GHz至最大频率范围。
“调整”是相对调整，不设置绝对水平。
例如，我们可以使用50 MHz或4.8 GHz内部校准器在仪器的前置放大器关闭的情况下设置参考功率电平，然后打开前置放大器并测量幅度差异，然后对此差异进行“校正”或“调整”。
我们在任何时候都不会使用校准器信号来设置绝对水平。
除非客户是客户校准实验室或安捷伦服务中心，并且已投资安捷伦校准和调整软件并拥有执行调整和校准程序所需的所有测试设备，否则客户无法进行其他校准或调整。
我认为在查看4.8 GHz校准器信号时，校准器信号电平略低于正常水平的原因是事先没有执行预选器中心。
在仪器上打开4.8 GHz校准器信号并设置大约100 MHz的跨度。
按：AMPTD，然后按Preselector Center软键。
预选器中心例程将在信号上放置一个标记，然后更改仪器预选器滤波器的中心频率（您将不会观察到这种情况），直到预选器滤波器以校准器信号为中心，这将产生最佳的幅度精度。
注意：内部4.8 GHz校准器信号的幅度标称值为-28.3 dBm +/- 0.3 dBm。
这会因仪器而略有不同。
我希望在您执行Preselector Center例程后，您之前的4.8 GHz校准器幅度-28.9 dBm将更接近-28.3 dBm，但即使不是，也不需要担心，只要分析仪是
完成自动对齐程序而不会出现故障。
内部50 MHz或4.8 GHz校准器信号的屏幕上振幅没有规范。
50 MHz校准器应出现在-25.00 dBm左右，+ / - 十分之几dB。
当您将分析仪送到安捷伦服务中心进行年度校准时，将对规格进行非常广泛的验证。
问候 -



     以下为原文

  Hi -

The N9030A, PXA contains an internal Auto Alignment routine that can be triggered manually by pressing front panel keys: System, Alignments, Align All , Now. There are SCPI commands to perform this routine also. All the alignments are performed automatically at instrument power up, and then run on a time and temperature basis WHEN the Auto Align is set to Normal. 
You will see a yellow box appear on screen that shows the alignment progress and you will see for example “Aligning 18 of 45”.  Does this seem like the SCPI alignment you mentioned below?

This auto alignment routine will  ‘adjust” (compensate the measurement for)  various signal path gains in both the 3 Hz to 3.6 GHz signal path,  and the 3.6 GHz to max frequency range of the instrument path. The “adjustments” are relative adjustments and do not set absolute levels. For example we might use the 50 MHz or  4.8 GHz internal calibrator  to set a reference power level with the instrument’s preamplifier OFF, then turn the preamplifier ON and measures the amplitude difference and then “correct” or “adjust” for this difference. At no time do we use the calibrator signal to set an absolute level. 

There are no other alignments or adjustments a customer can perform unless they are a customer cal lab, or an Agilent Service center and have invested in the Agilent calibration and adjust software and have all test equipment needed  to perform the adjustments and calibration procedures.

I think the cause of the slightly lower than normal calibrator signal level when viewing the 4.8 GHz calibrator signal is the fact that Preselector Centering has not been performed. 
On your instrument turn on the 4.8 GHz calibrator signal and set a span of around 100 MHz.
Press: AMPTD, and press Preselector Center softkey. The Preselector Center routine will place a marker on the signal and then change the center frequency of the instrument’s preselector filter  (you will not observe this happening) until the preselector filter is centered around the calibrator signal, which should result in the best amplitude accuracy. 

Note: the amplitude of the internal 4.8 GHz calibrator signal is nominally -28.3 dBm +/- 0.3 dBm. This will vary slightly from instrument to instrument. I would expect after you perform the Preselector Center routine your previous 4.8 GHz calibrator amplitude of -28.9 dBm will be a bit closer to -28.3 dBm, but even if it is not, there is no need for concern, as long as the analyzer is completing the auto align routine without failures appearing. 
There is no specification for the displayed on-screen amplitude of the internal 50 MHz or 4.8 GHz calibrator signals. The 50 MHz calibrator should appear at about -25.00 dBm,  +/- a few tenths of a dB. 

When you send your analyzer into an Agilent service center for annual calibration, a very extensive verification to specifications will be performed.  

Regards -