Grass Valley PDR v.2.1 - Manual (Page 71)

Analog Audio Output
Profile Family 55
To change line modes for the XLR connectors:
1. In the Analog Audio Output dialog box, click the Line Mode tab (Figure 34).
Figure 34. Analog Audio Output dialog box, Line Mode tab
2. In the Line Mode box, you have three options: Balanced (default),
unbalanced Pin 2 Low, or unbalanced Pin 3 Low. The illustrations of the
XLR connectors to the left of the box give visual cues of the selected mode.
3. After choosing a line mode or modes, click Close or another tab.