We test AD9370's Tx, AD9370 is initialized properly, FPGA sends baseband single frequency signals (amplitude not overflow), baseband single frequency signal 10MHz, and we find AD9370 output signal as follows:What's the cause, please?!
What hardware (evaluation board/Custom ) and SW are you using ?
Looks like calibrations are not done properly.
The hardware is custom, and the software is provided by ADI. We adapt software drivers to fit the hardware, and the calibration is successful.
Several of the same hardware, 80% will have this problem, and 20% is normal.
The crystal oscillator and the power supply are working properly.
In above what is the LO frequency , Is it 900MHz and you are sending tone signal from FPGA at 910MHz. ?
If you offset the tone(say make it 5MHz tone from FPGA) how will the spectrum look ?.
Without signal from FPGA , how is the spectrum.?
How you are deriving SYSREF and DEV_CLK_IN. ?
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