Eclypse z7 with zmod awg and scope , problem with calibration

[vasilistheodo]

My design in vivado is shown in the picture. I have chosen the ADC Sampling clock to be 10^5 ps -> 10MHz , so in the clocking wizard the clocks that i have initiated are SysClk:100MHz ,Fsadc_dac: 10MHz ,ADC_InClock: 40 Mhz, DAC_Clk: 10MHz , phase:90 degrees (values of the clocks are based on the documentation) . I also have added the zynq processor. The calibration of zmod awg and scope is external and i give gpio registers as inputs. The zmod scope is high gain and the zmod awg is low gain. The bitstream is generated correctly so i made the vitis application in order to read from the eeprom the user and processed calibration coefficients and then input them to the awg and scope via the gpio registers . I have also calculated on hand the processed coefficients  out of the  factory calibration coeffs (documentation gives specific functions for this calculation) and the results i get from vitis are the same (the processed calibration coefficients are the correct ones) . My problem now is that even though my results for the calibration coefficients are confirmed by vitis , when i give a sine wave from the waveform generator in channel 2 of the scope the output from channel 2 of the awg isn't the same as we would expect it to be. There is an offset as you can see in the photo below. Are there any ideas for solving this problem?

[artvvb]

Hi @vasilistheodo, welcome to the Forum!

It looks like the data output stream from the AWG is wired directly to the Scope input stream, without any additional DSP happening?

The Scope's high gain input range is ±1V and the AWG's low range is ±1.25V.

Thanks,

Arthur