AnsweredAssumed Answered

AD9364 unable to output Tx Modulated Data

Question asked by on Apr 14, 2015
Latest reply on Apr 15, 2015 by tlili

Hello Forum,


Using AD9361 Evaluation Software v2.1.4 (64-bit) and the attached AD9364_Project.prj file, I am able to create init script, which contains,

1. SPI register programming values.

2. The wait time or conditional bit done for letting AD9364 finish the configuration,


I developed C environment code equivalent of the generated init scrip, which I am is able to compile and run on my MCU board interfaced with AD9364.


In the same C code, I added an array containing OFDM I/Q samples.


The issue I am seeing that when I run the C code on MCU to transmit the MCU-in-memory stored OFDM I/Q data,

1. On some AD9364 on-board Tx, I see a proper and clean OFDM signal and

2. On some AD9364 on-board Tx, I see only a CW signal (may be a DC leakage).


I want help in debugging the above issue # 2,

1. By dumping SPI register and analyzing to find which internal block of AD9364 is not working

2. if there are or can be any AD9364 on-board specific SPI programming required


Appreciate for your help.