A device that broadcasts radio signals using Amplitude Modulation (AM). In aviation, AM is the standard modulation used for VHF communication between aircraft and Air Traffic Control (ATC), as well as for NDB (Non-Directional Beacon) signals on lower frequency bands.
How it works:
- Amplitude Modulation varies the strength (amplitude) of the carrier wave to encode voice or navigation signals.
- Receivers (like an ADF in aircraft) can tune into the frequency and extract the information.
- AM has the advantage of simplicity and long-distance propagation, though it is more vulnerable to static, weather, and interference compared to FM.
In aviation, AM radio transmitters support both voice communication and navigation aids, making them a core element of traditional IFR navigation systems.
Application in DCS World
- Many DCS aircraft radios operate in AM VHF for ATC, wingman, and ground control communication. ADF-capable aircraft can also tune into mission-placed AM beacons to simulate NDB navigation.
- DCS does not simulate all radio propagation effects (like static, fading, or night interference) that can impact AM signals in real life.
Cadets can practice by tuning aircraft radios to assigned AM frequencies for ATC comms, or by using ADF receivers with mission-placed AM beacons, reinforcing the connection between communication and navigation systems.