Generating a square waveform on zc706+fmcdaq2

Hi,

I have built the no-OS project and now been trying to generate the square waveform of 20MHz. I have made the changes in the sine_lut table with the square wave values whereras, I end up with the noise output on the oscilloscope. As per this thread https://ez.analog.com/fpga/f/q-a/102247/square-wave-output-using-fmcdaq2/   there are few hardware filters on DAQ2. Can someone please tell me how do I find the specific filters to be disabled to generate the square waveform.

Or, is there any way without modifying the board,I can generate the square waveform.

Any help is highly appreciated.

Thank you & regards,

Parents
  • +1
    •  Analog Employees 
    on Mar 10, 2020 7:44 AM over 1 year ago

    Hi,

    fmcdaq2 is design for RF. Because of the cutoff frequency of the analog filters you can't use the fmcdaq2 to send square waves. You wold have to redesign the schematic and that is beyond the scope of this forum.

    What do you intend to use the square wave for?

    Or, is there any way without modifying the board,I can generate the square waveform.

    Yes, use a GPIO from the FPGA.

    Andrei

Reply
  • +1
    •  Analog Employees 
    on Mar 10, 2020 7:44 AM over 1 year ago

    Hi,

    fmcdaq2 is design for RF. Because of the cutoff frequency of the analog filters you can't use the fmcdaq2 to send square waves. You wold have to redesign the schematic and that is beyond the scope of this forum.

    What do you intend to use the square wave for?

    Or, is there any way without modifying the board,I can generate the square waveform.

    Yes, use a GPIO from the FPGA.

    Andrei

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