I had a talk with Jacob at Techron and he said it's okay to just send a continuous 125khz sine wave just normal through the unbalanced bnc in the front of the box. I don't know a whole lot about the voltages yet but my analog discovery can only do a max of +/- 5v but the amplifier can take up to +/- 10v but I might not need that much. I also just discovered from a colleague that you can't use the BNC adapter board on the Analog Discovery 2 to send out a wave, it is only for reading so I hooked up a break out cable for all the pins and what I have to do is wire individual pins to an aligator clip to bnc cable and route the signal that way. In this case it would be W1 pin which is the yellow cable.