I'm a recent user of the qNimble Quatro. I have three questions all related to grounding.

Are the grounds of the ADC channels all floating and isolated from each other, or do they all have the same ground? If the grounds are all the same, is it also the same as the chassis or power supply, trigger, or USB ground?
Similarly, are all the grounds on the DAC output channels floating and isolated from each other, or do they all share a common ground? If the grounds are shared is this the same as the chassis, power supply, USB, trigger, or ADC channels grounds?
Finally, are all the grounds on the trigger channels floating and isolated from each other, or do they all share a common ground? If the grounds are shared is this the same as the chassis, power supply, USB, DAC, or ADC channels grounds?