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FMCDAQ2 : issues at DAC ouput

Question asked by amai on Jun 15, 2016
Latest reply on Jun 22, 2016 by larsc

Hi,

I'm using the AD-FMCDAQ2-EBZ with the KC705 board.

 

1/ I wrote a sequence with scilab that I send to the DAC with the IIO Oscilloscope(with the buffer), this sequence looks like this:

entrée_DAC.gif

But when I measure the DAC output at the oscilloscope, here is what I see:

sortie_dac.gif

An exponential component can clearly be dinstinguished where I should get the DC levels. Moreover, higher the voltage level is, the more the exponential is pronounced. Do you know where does it come from? What would i have to do to get my initial sequence at the dac output?

 

2/ I'd like not to use the IIO oscilloscope to transmit the sequences to the DAC because with this method i always have to load a different text file and for a real-time application, this is not appropriated. Is there a way to do it from the microblaze with the SDK software?

 

Thanks in advance,

 

Alexandre

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