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FMCOMMS5 phase calibration results consistency

Question asked by hermetic on Aug 21, 2017
Latest reply on Dec 12, 2017 by mhennerich

Hi all,

 

We are trying to perform phase calibration on FMCOMMS5 by using IIO Scope. I attached the screenshot of IIO Scope cal settings.

 

We repeat phase cal two or three times successively after the previous one completed successfully. However every phase cal results (RX1/RX2, RX3/RX4 Phase Rotation) quite different from each other. I expect consistency in cal results (phase differences) since nothing(temperature or other settings) changes between two consecutive calibrations.

Or are we missing something? I also attached two consecutive cal phase results.

 

1st cal phase rotation:

RX1/RX2:  1.22 ; RX3/RX4: 132.94

 

2nd cal phase rotation:

RX1/RX2:  104.06 ; RX3/RX4: 145.72

 

Best regards,

 

Burak.

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