What type of frequency spectrum does DME operate on?

Distance Measuring Equipment (DME) operates in the Ultra High Frequency (UHF) range, specifically between 962 MHz and 1213 MHz. This frequency range is suitable for transponder operations, allowing DME to provide precise distance information to pilots by measuring the time it takes for signals to travel between the aircraft and the ground station. The UHF spectrum is advantageous because it allows for high-frequency communication, which can support sensitive and accurate data transmission essential for navigation.

The other options pertain to different frequency ranges that do not apply to DME. The Very High Frequency (VHF) range is typically used for voice communication and some navigation aids, but it does not encompass the frequencies utilized by DME. Medium Frequency (MF) and Low Frequency (LF) ranges are associated with different types of radio communications and navigational systems, such as Non-Directional Beacons (NDBs), but they are not relevant to DME operations. Hence, UHF is the correct and appropriate spectrum for DME.