Arpit Rao

@miketranch Suppose I connect the Ground of my pair of AD2s to the supply of my DUT which is at 0V, will there be any current flowing into my DUT from the AD2? also what happens if the ground of the AD2 is floating? Will the Wavegen outputs toggle between -0.9V and 0V?

Hi @JColvin thanks for the reply, The DUT I am trying to test has a logic 0 at -0.9V and a logic 1 of 0V. The two AD2 devices I have I am connecting their Grounds together. Do I need to connect that common AD2 ground to another supply or I can leave it floating to the external world? I am giving the -0.9V to the DUT externally by using two positive external dc supplies. I connect the negative terminal of supply one to the positive terminal of supply 2 (0V) and taking the negative terminal of supply 2 to create -0.9V and giving it to the DUT. For the ringing, I am connecting the Wavegen outputs to an external oscilloscope through jumper to SMA, SMA to BNC. Thanks, Arpit

Greetings, I am trying to generate 4 synchronized custom patterns that toggle between -0.9V and 0V. I am using two Analog Discovery 2 devices and accessing the Wavegen with 4 channels and connecting T2 of the two devices together. I am setting the offset voltage to -0.9V and amplitude to 0.9V. The ground of the Analog Discovery 2 I am connecting to a -0.9V supply which is the logic 0 for my DUT. My DUT is on a PCB and has a custom IC and can’t take too much current. Is there something wrong with my test setup? Also when I connected the outputs of the Wavegen to an external oscilloscope I see a lot of ringing in the waveform, is that expected? Any feedback or suggestions are welcome. Thanks, Arpit