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ADUCM350 2 Wire examle zero values

Question asked by gugi on Jul 5, 2015
Latest reply on Aug 1, 2015 by gugi

Hello,

When I run ImpedanceMeasurement_2_Wire example from time to time I get 0 results like:

DFT results (real, imaginary):
    RCAL        = (     0,      0)
    AFE3 - AFE4 = (     0,      0)
    AFE4 - AFE5 = (     0,      0)
    AFE3 - AFE5 = (     0,      0)

Final results (magnitude, phase):
    AFE3 - AFE4 = (       0.0000,        0.0000)
    AFE4 - AFE5 = (       0.0000,        0.0000)
    AFE3 - AFE5 = (       0.0000,        0.0000)

I found that if I put in comments following part of program:

   /* TIA Channel Calibration */

      if (adi_AFE_TiaChanCal(hDevice))

      {

          FAIL("adi_AFE_TiaChanCal");

      }

It is OK.

Can you tell me what is the problem with adi_AFE_TiaChanCal(hDevice))  and why it corrupt the measurements?

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