The IAC control receives the audio error signal and produces which signal?

The IAC control receives the audio error signal and produces which signal?

• A. Bearing Hold
• B. Audio Error
• C. ADF Valid Signal
• D. 26 VAC Reference

Answer: (A)

The IAC control is designed to turn the detected audio error into a corrective steering command, so it can keep you on a desired path. The audio error tells you how far off your current bearing is from the target, and the IAC converts that deviation into a bearing-hold signal that the navigation or autopilot system uses to maintain that bearing. It isn’t producing the raw error itself, nor is it providing a status signal like ADF validity or a power reference. Those latter signals are separate: ADF valid indicates input reliability, and the 26 VAC reference is a power supply reference, not an output of the audio-error processing.

The IAC control is designed to turn the detected audio error into a corrective steering command, so it can keep you on a desired path. The audio error tells you how far off your current bearing is from the target, and the IAC converts that deviation into a bearing-hold signal that the navigation or autopilot system uses to maintain that bearing. It isn’t producing the raw error itself, nor is it providing a status signal like ADF validity or a power reference. Those latter signals are separate: ADF valid indicates input reliability, and the 26 VAC reference is a power supply reference, not an output of the audio-error processing.