ADRV9002: Phase offset of RX1 and RX2

Question

hello. 
 I had another similar question but did not receive an answer, so I will inquire here. 
 
 I have input the same signal to RX1 and RX2 as follows..

I expected the phase offset between RX1 and RX2 to be 0 degrees. 
 However, the waveforms acquired by the IIO oscilloscope showed that the phase of RX1 and RX2 were offset by 180 degrees. I turned the power off and on several times, but the phase offset was always 180 degrees. 
 
 Will this phase offset always be 180 degrees? Also, is it possible to set the phase offset of RX1 and RX2 to 0 degrees? 
 
 Best regards hsato

nsa · Accepted Answer

Hmm, I just realized you have different DDS frequency between your TXs. Like that, I think phase offset is expected. I did a quick test and things look good: 
 
 And here are my settings: 
 
 Should also mention that I'm using the master development branch... If at the same frequencies, you still see the same behavior, please try the 2022_R2 branch. 
 - Nuno S&aacute;)

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ADRV9002: Phase offset of RX1 and RX2

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