Technician › T8
T8 Signals and Emissions
47 questions in the pool. Your exam will include 4, one from each group below.
T8A
Basic characteristics of FM and SSB; Bandwidth of various modulation modes: CW, SSB, FM, fast-scan TV; Choice of emission type: selection of USB vs LSB, use of SSB for weak signal work, use of FM for VHF packet and repeaters
- T8A01Which of the following is a form of amplitude modulation?
- T8A02What type of modulation is commonly used for VHF packet radio transmissions?
- T8A03Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?
- T8A04Which type of modulation is commonly used for VHF and UHF voice repeaters?
- T8A05Which of the following signal types has the narrowest bandwidth?
- T8A06Which sideband is normally used for 10-meter HF, VHF, and UHF single-sideband communications?
- T8A07What is one characteristic of single sideband (SSB) compared to FM?
- T8A08What is the approximate bandwidth of a typical single sideband (SSB) voice signal?
- T8A09What is the approximate bandwidth of an FM voice signal on VHF repeaters?
- T8A10What is the approximate bandwidth of AM fast-scan TV transmissions?
- T8A11What is the approximate bandwidth required to transmit a CW signal?
- T8A12Which of the following is a disadvantage of FM compared with single sideband?
T8B
Amateur satellite operation: Doppler shift, basic orbits, operating protocols, modulation mode selection, transmitter power considerations, telemetry, satellite tracking programs, beacons, uplink and downlink mode definitions, spin fading, definition of “LEO”, setting uplink power
- T8B01What telemetry information is typically transmitted by satellite beacons?
- T8B02What is the impact of using excessive effective radiated power on a satellite uplink?
- T8B03Which of the following are provided by satellite tracking programs?
- T8B04What mode of transmission is commonly used by amateur radio satellites?
- T8B05What is a satellite beacon?
- T8B06Which of the following are inputs to a satellite tracking program?
- T8B07What is Doppler shift in reference to satellite communications?
- T8B08What does it mean if a satellite is operating in U/V mode?
- T8B09What causes spin fading of satellite signals?
- T8B10What does the term LEO mean in reference to communication satellites?
- T8B11Who is permitted to receive telemetry from an amateur radio satellite?
- T8B12Which of the following is a way to determine whether your satellite uplink power into a linear transponder satellite is neither too low nor too high?
T8C
Operating activities: radio direction finding, contests, linking over the internet, exchanging grid locators
- T8C01Which of the following methods is used to locate sources of noise interference or jamming?
- T8C02Which of these items would be useful for a hidden transmitter hunt?
- T8C03What operating activity involves contacting as many stations as possible during a specified period?
- T8C04Which of the following is good practice when contacting another station in a contest?
- T8C05What is a grid locator?
- T8C06How is over the air access to Internet Radio Linking Project (IRLP) nodes accomplished?
- T8C07What is Voice Over Internet Protocol (VoIP)?
- T8C08What is the Internet Radio Linking Project (IRLP)?
- T8C09Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?
- T8C10What is required before using the EchoLink system?
- T8C11What is an amateur radio station that connects other amateur stations to the internet?
T8D
Non-voice and digital communications: image signals and definition of NTSC, CW, packet radio, PSK, APRS, error detection and correction, amateur radio networking, DMR, WSJT modes, Broadband-Hamnet
- T8D01Which of the following is a digital communications mode?
- T8D02What is FT8?
- T8D03What kind of data can be transmitted by APRS?
- T8D04What is meant by the term "NTSC?"
- T8D05Which of the following is an application of APRS?
- T8D06What does the abbreviation "PSK" mean?
- T8D07Which of the following describes DMR?
- T8D08Which of the following is included in packet radio transmissions?
- T8D09What is CW?
- T8D10Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?
- T8D11What is the role of ARQ in a transmission system?
- T8D12Which of the following best describes an amateur radio mesh network?