主电源上的铁氧体钳是否会导致分析仪增加足够的阻抗？

亲爱的先生，我决定重建我的LISN（线路阻抗稳定网络）进行EMC测试。
然后我想知道连接频谱分析仪的最佳方法是什么。
EXA上有一个电源接地连接，它连接到后面的外壳，N连接器连接到前面的外壳。
因此，从N连接器到LISN以及从主电源到LISN存在接地回路。
由EXA接地连接，LISN的接地连接形成的接地回路，以及由LISN的测量端子连接到EXA输入端的同轴电缆屏幕完成的回路。
什么推荐？
主电源上的铁氧体钳是否会导致分析仪增加足够的阻抗？
附件文件是EXA＆amp;
LISN接地回路连接。
此致，托马斯李



     以下为原文

  Dear Sir,

I decided to rebuild my LISN (Line Impedance Stabililsing Network) for EMC testing.
I then wondered just what was the best way to connect the Spectrum analyzer.

There is an mains earth connection on the EXA which connects to the case
at the back, and the N connector connects to the case at the front.
There is thus an earth loop from the N connector to the LISN and from the mains to the LISN.

The earth loop formed by the EXA earth connection, the LISN's earth connection,
and the loop which is completed by the screen of the coax joining the measurement terminal of the LISN to the input of the EXA.

What is recommended?
Would a ferrite clamp on the mains lead to the analyzer add enough impedance?

Attachment file is EXA & LISN earth loop connection.

Regards,
Thomas Lee   
附件

• EXA_earth_loop.png165.3 KB