restorer-john
Grand Contributor
Where "ground" comes in is consideration of balanced, and there, the ONLY thing that matters is equal impedances to ground. Equal voltages to ground aren't necessary for balanced transmission and reception.
Absolutely true. Except they were clearly created from a single ended source that was referenced to GND/0V in the first place. We are, remember, discussing outputs, from a DAC in this thread.
The DAC was, and is, not remotely floating, balanced or differential, apart from the fact that it has two +/- outputs from the IC/OPT itself. The original source signal was never differential or balanced. It was NRZ at its core.