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Hi all! I'm trying to use ni usb-6002 to measure a low level DC signal which is around 1.3 V. I used differential set up and two 47k bias resistors. The device is connected to a laptop computer that is connected to a power outlet and is then connected to a wall socket. Here is an actual picture of the connection However, this gives me really noisy measurement. the actual signal should be about 1.25V. and an fft image of it so it looks like I get all kinds of interference. However, if