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Problem with the output of iio-oscilloscope

Question asked by 泪也有温度 on Feb 3, 2015
Latest reply on Feb 4, 2015 by tlili

Problem with the output of iio-oscilloscope

 

Hi ALL,

We have an FMCOMMS2 board that is connected to a Zynq7Z020 FPGA board running Linux. I have a few questions about the output of iio-oscilloscope provided by ADI:

  1. 1. In fft-mode, the figure of the spectrum is not flat, which means the spectrum besides the LO frequency is always stronger than the others. The figure of the spectrum looks like an arch. Why?

iio_output.png

  1. 2. Can we do something to solve that problem? The figure of the spectrum got from the B200(Ettus) is rather flat.

123.png

Regards,

ws

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