Which term describes the ability of a receiver to detect the presence of a signal?
AnswerSensitivity.
Receiver sensitivity describes how weak a signal can be and still be detected or used.
RF PREP // FCC AMATEUR RADIO
T7 · Practical Circuits
Technician · correct answers only, in question-pool order.
What is a transceiver?
AnswerA device that combines a receiver and transmitter.
Most modern amateur radios combine both functions in one unit, hence transmitter + receiver = transceiver.
Which of the following is used to convert a signal from one frequency to another?
AnswerA mixer.
A mixer combines signals so that sum and difference frequencies are produced, allowing frequency conversion in receivers and transmitters.
What is the primary purpose of a dummy load?
AnswerTo prevent transmitting signals over the air when making tests.
A proper dummy load absorbs transmitter RF power while presenting the expected impedance, allowing testing without intentionally radiating a signal.
Which of the following is used to determine if an antenna is resonant at the desired operating frequency?
AnswerAn antenna analyzer.
An antenna analyzer measures impedance-related behavior across frequency and is especially useful for finding resonance and evaluating an antenna system.