What is the primary characteristic of the AN/PRC-150 radio regarding its operating frequency?

The AN/PRC-150 radio is designed to operate primarily in the HF (High Frequency) range and low band VHF (Very High Frequency). This characteristic allows the radio to facilitate long-range communications, which is critical for military operations, as HF frequencies enable effective communication over vast distances. Additionally, the capability to operate in low band VHF provides versatility for various communication needs in different operational environments.

Other options are less relevant because they either limit the radio's capabilities to a single frequency band, like VHF or UHF, or imply a lack of advanced features such as frequency hopping, which is an important capability for secure communications in modern radios. Thus, the ability to utilize both HF and low band VHF frequencies is the primary characteristic that makes the AN/PRC-150 a valuable tool for communication in diverse and challenging situations.