On the ACP, which action selects the radio to transmit?

On the ACP, which action selects the radio to transmit?

• A. Select the desired radio on the ACP.
• B. Press the PTT on the handset.
• C. Turn the RMP knob.
• D. Toggle the FMGS frequency.

Answer: (A)

To set which radio will be used to transmit, you select the desired radio directly on the ACP. That selection makes that radio the active transmit/receive path. The actual transmission then occurs when you press the push-to-talk control, but you must first choose the radio on the ACP. The other actions—tuning frequencies with the RMP knobs or toggling any FMGS frequency—do not pick the transmit radio.

To set which radio will be used to transmit, you select the desired radio directly on the ACP. That selection makes that radio the active transmit/receive path. The actual transmission then occurs when you press the push-to-talk control, but you must first choose the radio on the ACP. The other actions—tuning frequencies with the RMP knobs or toggling any FMGS frequency—do not pick the transmit radio.