Which statement describes the Portable Radio?

• A. Simplex style radio carried on the responder
• B. Duplex style radio used in a vehicle
• C. A base station
• D. A satellite radio

Answer: (A)

Portables are designed to be carried by responders in the field and operate in simplex mode, meaning they transmit and receive on the same channel without separate transmit and receive paths. This makes them compact, battery-powered, and quick to use when you’re moving around on scene, since you can push the talk button and communicate directly with others on the same frequency.

Duplex radios, typically used in vehicles, transmit on one frequency and receive on another (often through a repeater) to extend range, which adds complexity and relies on the vehicle’s setup. A base station is a fixed, stationary system used at a command post or dispatch center, not portable. Satellite radios depend on satellites and aren’t the standard for EMS field communications. So the portable radio best fits as a simple, handheld, simplex device carried by the responder.