Extra Class

Which describes spread spectrum frequency hopping?

What is the primary effect of extremely short rise or fall time on a CW signal?

What is the most common method of reducing key clicks?

What is the advantage of including parity bits in ASCII characters?

What is a common cause of overmodulation of AFSK signals?

What parameter evaluates distortion of an AFSK signal caused by excessive input audio levels?

What is considered an acceptable maximum IMD level for an idling PSK signal?

What are some of the differences between the Baudot digital code and ASCII?

What is one advantage of using ASCII code for data communications?

What is an isotropic radiator?

What is the effective radiated power (ERP) of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?

What term describing total radiated power takes into account all gains and losses?

Which of the following factors affect the feed point impedance of an antenna?

What does the term “ground gain” mean?

What is the effective radiated power (ERP) of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?

What is the effective isotropic radiated power (EIRP) of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

Which frequency band has the smallest first Fresnel zone?

What is antenna efficiency?

Which of the following improves the efficiency of a ground-mounted quarter-wave vertical antenna?

Which of the following determines ground losses for a ground-mounted vertical antenna operating on HF?