E2A Amateur radio in space: amateur satellites; orbital mechanics; frequencies and modes; satellite hardware; satellite operations
- E2A01 (C)
What is the direction of an ascending pass for an amateur satellite? #card
- A. From west to east
- B. From east to west
- C. From south to north
- D. From north to south
- E2A02 (D)
Which of the following is characteristic of an inverting linear transponder? #card
- A. Doppler shift is reduced because the uplink and downlink shifts are in opposite directions
- B. Signal position in the band is reversed
- C. Upper sideband on the uplink becomes lower sideband on the downlink, and vice versa
- D. All these choices are correct
- E2A03 (D)
How is an upload signal processed by an inverting linear transponder? #card
- A. The signal is detected and remodulated on the reverse sideband
- B. The signal is passed through a nonlinear filter
- C. The signal is reduced to I and Q components, and the Q component is filtered out
- D. The signal is mixed with a local oscillator signal and the difference product is transmitted
- E2A04 (B)
What is meant by the “mode” of an amateur radio satellite? #card
- A. Whether the satellite is in a low earth or geostationary orbit
- B. The satellite’s uplink and downlink frequency bands
- C. The satellite’s orientation with respect to the Earth
- D. Whether the satellite is in a polar or equatorial orbit
- E2A05 (D)
What do the letters in a satellite’s mode designator specify? #card
- A. Power limits for uplink and downlink transmissions
- B. The location of the ground control station
- C. The polarization of uplink and downlink signals
- D. The uplink and downlink frequency ranges
- E2A06 (A)
What are Keplerian elements? #card
- A. Parameters that define the orbit of a satellite
- B. Phase reversing elements in a Yagi antenna
- C. High-emission heater filaments used in magnetron tubes
- D. Encrypting codes used for spread spectrum modulation
- E2A07 (D)
Which of the following types of signals can be relayed through a linear transponder? #card
- A. FM and CW
- B. SSB and SSTV
- C. PSK and packet
- D. All these choices are correct
- E2A08 (B)
Why should effective radiated power (ERP) be limited to a satellite that uses a linear transponder? #card
- A. To prevent creating errors in the satellite telemetry
- B. To avoid reducing the downlink power to all other users
- C. To prevent the satellite from emitting out-of-band signals
- D. To avoid interfering with terrestrial QSOs
- E2A09 (A)
What do the terms “L band” and “S band” specify? #card
- A. The 23- and 13-centimeter bands
- B. The 2-meter and 70-centimeter bands
- C. FM and digital store-and-forward systems
- D. Which sideband to use
- E2A10 (B)
What type of satellite appears to stay in one position in the sky? #card
- A. HEO
- B. Geostationary
- C. Geomagnetic
- D. LEO
- E2A11 (B)
What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation? #card
- A. A linearly polarized antenna
- B. A circularly polarized antenna
- C. An isotropic antenna
- D. A log-periodic dipole array
- E2A12 (C)
What is the purpose of digital store-and-forward functions on an amateur radio satellite? #card
- A. To upload operational software for the transponder
- B. To delay download of telemetry between satellites
- C. To hold digital messages in the satellite for later download
- D. To relay messages between satellites
- E2A13 Question Deleted (section not renumbered)
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E2B Television practices: fast-scan television standards and techniques; slow scan television standards and techniques
