Extra Class
The highest level of amateur radio license with full operating privileges on all amateur bands. Most technical exam. 50 questions, 37 needed to pass.
What describes orthogonal frequency-division multiplexing (OFDM)?
What is deviation ratio?
What is frequency division multiplexing (FDM)?
What is digital time division multiplexing?
What is Quadrature Amplitude Modulation or QAM?
What is the definition of symbol rate in a digital transmission?
Why should the phase of a PSK signal be changed at the zero crossing of the RF signal?
What technique minimizes the bandwidth of a PSK31 signal?
What is the approximate bandwidth of a 13-WPM International Morse Code transmission?
What is the bandwidth of an FT8 signal?
What is the bandwidth of a 4,800-Hz frequency shift, 9,600-baud ASCII FM transmission?
How does ARQ accomplish error correction?
Which digital code allows only one bit to change between sequential code values?
How can data rate be increased without increasing bandwidth?
What is the relationship between symbol rate and baud?
What factors affect the bandwidth of a transmitted CW signal?
What type of addresses do nodes have in a mesh network?
What technique do individual nodes use to form a mesh network?
Why are received spread spectrum signals resistant to interference?
What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?
HAM Test Bank Editorial Team
Licensed Amateur Radio Operators & Volunteer Examiners
Content for Extra Class exam questions is based on official FCC Part 97 regulations and the NCVEC question pool.