Loopback of TX and RX in AD9361

Did you check the output at TX in a spectrum analyzer? Use a bandpass filter at the TX output and then feed it to RX so as to eliminate the TX harmonic's getting mixed up with the RX and causing distortion of the actual signal in the RX output spectrum

Did you check the output at TX in a spectrum analyzer? Use a bandpass filter at the TX output and then feed it to RX so as to eliminate the TX harmonic's getting mixed up with the RX and causing distortion of the actual signal in the RX output spectrum

Hi srimaoy thanks for responding.

Yes i have checked spectrum it is coming and there is no sidelobes also. It is perfect.

I have checked everything.

1.How can i loopback in digital domain?

2.does data goes to DDR before feeding to DAC ?

Regards

Anki

The Harmonics of the Tx mixes with the Rx Lo and creates spurs in band. Use a filter at the TX output. You should get a clean response at Rx output. 

You can use internal BIST tone, to do digital loopback. refer below link:

https://ez.analog.com/wide-band-rf-transceivers/design-support/w/documents/10068/ad936x-built-in-self-test-bist