AnsweredAssumed Answered

How does long long measurement calble affact the test result?

Question asked by dongdongdarwin on Nov 22, 2014
Latest reply on Nov 24, 2014 by Dr_joel
Hi experts,

We know that the measurement cable should be good enough to ensure the caccuracy of test resut, but in some scene we have to use very long cable with high loss (~1dB)  in order to achive the connection though such as chamber or shielding box, so i have some questions about that:

1. After standard calibration steps(SOLT or ECal used..) was adopted, is there any error bought by this long cable? 

2.If yes to Q1, which case was sufferring the biggest error, I thought return loss would be affacted by the calbe loss but i don't know how to explain it from mathmatics point of view, is there any tutorial for this ?

3.How to reduce or enliminate the effect? More calibration steps needed?

Thanks...  

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