MXA 9020A的输入电平是多少

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     以下为原文

  No takers?...

我认为MXA的33dBm太高了。
您可能会损坏频谱分析仪接收器或内部衰减器。
我的建议是放置外部衰减器（列表10dB~5瓦），然后另外将内部衰减器设置为34dB。
常规小衰减器约为1-2W，因此使用5W更好。
衰减器需要很小的功率余量，因此它不会升温并失去衰减值或烧毁。
这种方法应该保护频谱分析仪免受损坏，并且它定位来自接收器压缩的功率电平。
我还建议将外部衰减器靠近DUT而不是频谱分析仪。
使用靠近DUT的外部衰减可以减少电缆的不匹配，从而提高DUT的整体性能。
这是混频器/转换器测量的标准做法。



     以下为原文

  I think 33dBm to MXA is too high. You probably will damage the Spectrum Analyzer receiver or internal attenuators.
My recommendation is to put external attenuator (at list 10dB ~5 watts) and then additionally set the internal attenuator to 34dB.
Regular small attenuators are around 1-2W, so better used 5W. You need little power margined for attenuator so it not heat up and lose attenuation value or burn.
That approach should protect the Spectrum Analyzer from damage, and it position the power level fare from receiver compression.
I will also recommend putting the external attenuator close to DUT not Spectrum Analyzer. Using external attenuation close to DUT reduce any mismatches from cables, connectors improving overall performance of the DUT.
It is standard practice in mixer/converters measurement.

嗨Mirek，我猜你建议使用10 dB衰减器，它可以处理最大5W的功率。
您是否建议在测量最大+33 dBm的GMSK突发时使用此功能。
功率（不是CW为+33 dBm）？



     以下为原文

  Hi Mirek,

I guess you are suggesting to use a 10 dB attenuator which can handle a maximum of 5W power. Are you suggesting this to be used even while measuring GMSK bursts with a +33 dBm max. power (not a CW of +33 dBm)?

是的，您应该将该衰减器与任何信号一起使用，包括GMSK突发和任何其他调制信号。
我不是数字调制信号的专家，但我知道即使信号的峰值功率低于接收器的分离电平，如果总带宽功率高于此值，频谱分析仪也可以分离。
在你的情况下，功率为33dBm肯定高于MXA的伤害等级。
我甚至建议使用甚至高于5W（如10W）的衰减器来避免衰减器的加热效应。
您也可以首先使用具有小衰减（如0.5dB）的5W衰减器，因此它们将吸收功率的一部分，然后随着功率降低而跟随更大的衰减值。
我通常试图比设备的伤害等级低5-10dB。
我在生活中这样做了大量的分解测试设备，其中大部分都是由于过功率造成的。
因此，保持设备保存它会回报你。



     以下为原文

  Yes, you should use that attenuator with any signal including GMSK bursts and any other modulated signal. 

I am not specialist in digitally modulated signal but I do understand that the Spectrum Analyzer can be demerge even if the peak power of signal is below demerge level of receiver if the total bandwidth power is above. In your case, the power is 33dBm is definitely above damage level of MXA.
I will even suggest to use even higher then 5W (like 10W) attenuator to avoid heating effect of the attenuator. You could also use 5W attenuator with small attenuation (like 0.5dB) first, so they will absorb fraction of the power, and then follow by bigger attenuation values as power is reduced. I usually try to be 5-10dB below damage level of the equipment.   

I did so in my life big number of demerge test equipment and most of them was due to over power. Therefore, keep the equipment save it will pay you back.