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Jonathan MA Tech

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    Jonathan MA Tech reacted to Fausto in Noise and Impedance of MC USB-3105 Analog Output   
    Hello @Jonathan MA Tech.
    Please confirm whether or not your customer has a PCI-DAS6036 board.
    https://www.mccdaq.com/pdfs/manuals/PCI-DAS6034-35-36.pdf
    The analog input channels on a PCI-DAS6036 board have a 100 GOhm input impedance, while the USB-3105 has a low analog output impedance, < 1 Ohm, as previous posted.
    How much noise are you measuring on the analog input channels?
    Can you detail your signal wiring connections?
    Regards,
    Fausto
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    Jonathan MA Tech reacted to JRys in Noise and Impedance of MC USB-3105 Analog Output   
    Hey Jonathan,
    The USB-3105 output impedance is less than an ohm. Impedance is not the issue. Is the connection to the customer's A/D single-ended or differential? Is there or was there isolation. I ask because a ground loop, if not too severe, will make a signal noisy.
    best regards,
    John
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