The backup Radio tuning path is only associated with ____________.
MCDU 3
The “dual arrow” symbol indicates what?
Exchanges between the active and present frequencies.
On the comms page, the cursor box highlights the ___________.
Preset value field
MCDU #2 and pilot Audio Control Panel (ACP) are on the __________ bus.
Emergency bus
COM 1, NAV 1, XPDR 1