Which modulation types are used by the VHF radio described?

• A. Amplitude Modulation and Frequency Modulation
• B. Single Sideband only
• C. Frequency Modulation only
• D. Amplitude Modulation only

Answer: (A)

This item tests the idea that the described VHF radio is capable of more than one modulation method. A multi-mode radio can transmit and receive using different schemes depending on the link or mission needs. In VHF operations, frequency modulation is the standard for voice because it stays readable even when the signal strength degrades. Amplitude modulation, while less robust to noise, is still used in some systems or for certain data links and for compatibility with older equipment. Since the described radio supports both, it can handle both AM and FM signals, making that choice the best fit. Stating only one modulation type would not reflect the radio’s described capability.