Troubleshooting Network Analyzer Impedance Measurement

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Discussion Overview

The discussion revolves around troubleshooting issues with impedance measurements using a Network Analyzer, specifically focusing on the interpretation of results displayed on a Smith chart. The context includes practical application and technical clarification related to measurement techniques.

Discussion Character

  • Technical explanation, Experimental/applied

Main Points Raised

  • One participant reports an issue with the Network Analyzer displaying an impedance measurement incorrectly on the Smith chart.
  • Another participant questions the orientation of the Smith chart, suggesting it should have the resistance scale vertical.
  • A third participant raises a concern about the line lengths to the test and reference loads, indicating that unequal lengths could result in incorrect points on the chart.
  • A later reply indicates that the original poster resolved the issue by resetting the analyzer and recalibrating it.

Areas of Agreement / Disagreement

The discussion includes multiple viewpoints regarding potential causes of the measurement issue, but there is no consensus on the initial problem's cause before it was resolved by the original poster.

Contextual Notes

Participants did not specify the exact conditions under which the measurements were taken, nor did they clarify the specific settings used on the Network Analyzer.

gremio594
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In class we are learning to use Network Analyzers. I am trying to measure impedance on with it but the analyzer is not displaying the point right. I'm measuring a 100 ohm resister and the point is way to the right on the smith chart, like not even on the smith chart. My professor doesn't know how to fix this any ideas?
 
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Which way round is your Smith chart? Is it with the resistance scale vertical?
 
Have you made sure that the line lengths to the test and reference loads are equal? Unequal lengths can give a point at any point on a circle on the Chart.
 
Thanks for the help guy but I figured it out. Had to hit preset then had to redo the cal
 

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