In EMS radio communications, what is the function of repeaters?

• A. They store patient data
• B. They receive a signal from another radio and rebroadcast it over a larger area, increasing the power of the signal
• C. They compress digital signals
• D. They are used only for emergency broadcasts

Answer: (B)

Repeaters extend EMS radio coverage by acting as a relay: a unit sends a signal to the repeater, which then rebroadcasts it at higher power over a larger area (often on a different transmit frequency). This enables clear communication to units that are out of direct range, improves signal penetration into buildings, and helps reach crews in terrain or distant locations. They work best when properly positioned and licensed to avoid interference, and they are used for both routine and emergency communications, not just urgent broadcasts. They do not store patient data, nor do they compress digital signals; their purpose is purely to relay and amplify the transmission to expand reach.