122. Basic operations2-1. Transitions2-1-1. Selecting the busPress the crosspoint switches to select the material which will be targeted for the background transition.By pressing these switches, the signals are selected, and the indicators of the selected switches light.The color in which the switch indicators light differs depending on the operation status.Lighting in red: When the selected input signals are output to PGM.Lighting in green: When the selected input signals are not output to PGM.For details on how to select the key source bus and key fill bus, refer to “2-3-1” and “2-3-4”.For details on how to select the AUX bus, refer to “3-2-2”.2-1-2. Selecting the bus modeSelect the A/B bus system or flip-flop system (PGM/PST system) from the setting menu. Press the [FUNC] switch to light its indicator, and then press the [SETUP] switch to display the SETUP menu. Turn [F1] to display the BUS menu. Turn [F2], and select the A/B or P/P (flip-flop system) using the MODE item.BUS11/14MODEA/BP/PWith the flip-flop (P/P) system, the PGM/A bus selected signals are always output as PGM images, and the PST/Bbus selected signals are always output as PVW (PST) images.System Video output Before transition During transition After transition completionA/B PGM PGM/A PGM/A, PST/B PST/BPVW (PST) PST/B PST/B PGM/A* With an A B transitionSystem Video output Before transition During transition After transition completionFlip-flop P/P PGM PGM/A PGM/A, PST/B PGM/APVW (PST) PST/B PST/B PST/B