3 Instrument Configuration90 Keysight U8903A User’s GuideOutput SettingsThe U8903A generator output settings can be configured using selectable outputconnections, impedances, and reference impedances as shown in the figure below.Figure 3-17 Output settingsOutput typeThe output connection can be set to Balanced, Unbalanced, or Common mode.Balanced outputs a pair of differential signals which are equal in amplitude but180° out of phase on the XLR positive and negative pins.Unbalanced outputs a signal referenced to ground on the BNC output connector.Common mode outputs a pair of equal amplitude and in-phase signals on the XLRpositive and negative pins.