Please see the attached file showing what appears to be a linearity issue with the AD9361. What would you recommend to clean up the constellation. The objective is to implement a 64QAM but it's not possible with this level of performance.
First of all, AD9361 is not used in FMCOMMS1. It is used in FMCOMMS2.
FMCOMMS1 has a problem of IQ imbalance. Please refer to the following link:
Before you try some other methods, please make sure this issue has been corrected.
Thanks Di, sorry, my mistake including AD9361 in the title. The customer plans to transition to it. I got ahead of myself. I tried posting this reply in EZ but nothing happens when I hit the Reply button. I’m still having issue with EZ and VP N and have a service ticket entered to get it fixed.
Staff Field Applications Engineer
Analog Devices, Inc.
10151 University Blvd.
Orlando, FL 32817
ZONE Answers. Right. Now.
Concerning the "Reply" button problem, I used to get the same thing. The way I fixed it is in Internet Explorer F12 developer tools, change both "Browser Mode" and "Document Mode" to "IE7". You can give it a try and hopefully it will fix your problem also.
Your attachment is describing the FMCOMMS1 - the discrete solution, not the FMCOMMS2/3/4/5 - the AD9361 based solutions.
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