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logseq/bak/pages/E2A/2025-05-01T20_36_29.885Z.Desktop.md
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E2A Amateur radio in space: amateur satellites; orbital mechanics; frequencies and modes; satellite hardware; satellite operations
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- [[E2A01]] (C)
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What is the direction of an ascending pass for an amateur satellite?
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- [[A.]] From west to east
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- [[B.]] From east to west
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- [[C.]] From south to north
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- [[D.]] From north to south
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--
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- [[E2A02]] (D)
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Which of the following is characteristic of an inverting linear transponder?
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- [[A.]] Doppler shift is reduced because the uplink and downlink shifts are in opposite directions
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- [[B.]] Signal position in the band is reversed
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- [[C.]] Upper sideband on the uplink becomes lower sideband on the downlink, and vice versa
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- [[D.]] All these choices are correct
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--
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- [[E2A03]] (D)
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How is an upload signal processed by an inverting linear transponder?
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- [[A.]] The signal is detected and remodulated on the reverse sideband
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- [[B.]] The signal is passed through a nonlinear filter
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- [[C.]] The signal is reduced to I and Q components, and the Q component is filtered out
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- [[D.]] The signal is mixed with a local oscillator signal and the difference product is transmitted
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--
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- [[E2A04]] (B)
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What is meant by the “mode” of an amateur radio satellite?
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- [[A.]] Whether the satellite is in a low earth or geostationary orbit
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- [[B.]] The satellite’s uplink and downlink frequency bands
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- [[C.]] The satellite’s orientation with respect to the Earth
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- [[D.]] Whether the satellite is in a polar or equatorial orbit
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--
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- [[E2A05]] (D)
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What do the letters in a satellite’s mode designator specify?
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- [[A.]] Power limits for uplink and downlink transmissions
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- [[B.]] The location of the ground control station
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- [[C.]] The polarization of uplink and downlink signals
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- [[D.]] The uplink and downlink frequency ranges
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--
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- [[E2A06]] (A)
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What are Keplerian elements?
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- [[A.]] Parameters that define the orbit of a satellite
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- [[B.]] Phase reversing elements in a Yagi antenna
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- [[C.]] High-emission heater filaments used in magnetron tubes
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- [[D.]] Encrypting codes used for spread spectrum modulation
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--
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- [[E2A07]] (D)
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Which of the following types of signals can be relayed through a linear transponder?
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- [[A.]] FM and CW
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- [[B.]] SSB and SSTV
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- [[C.]] PSK and packet
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- [[D.]] All these choices are correct
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--
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- [[E2A08]] (B)
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Why should effective radiated power (ERP) be limited to a satellite that uses a linear transponder?
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- [[A.]] To prevent creating errors in the satellite telemetry
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- [[B.]] To avoid reducing the downlink power to all other users
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- [[C.]] To prevent the satellite from emitting out-of-band signals
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- [[D.]] To avoid interfering with terrestrial QSOs
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--
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- [[E2A09]] (A)
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What do the terms “L band” and “S band” specify?
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- [[A.]] The 23- and 13-centimeter bands
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- [[B.]] The 2-meter and 70-centimeter bands
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- [[C.]] FM and digital store-and-forward systems
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- [[D.]] Which sideband to use
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--
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- [[E2A10]] (B)
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What type of satellite appears to stay in one position in the sky?
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- [[A.]] HEO
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- [[B.]] Geostationary
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- [[C.]] Geomagnetic
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- [[D.]] LEO
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--
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- [[E2A11]] (B)
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What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?
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- [[A.]] A linearly polarized antenna
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- [[B.]] A circularly polarized antenna
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- [[C.]] An isotropic antenna
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- [[D.]] A log-periodic dipole array
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--
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- [[E2A12]] (C)
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What is the purpose of digital store-and-forward functions on an amateur radio satellite?
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- [[A.]] To upload operational software for the transponder
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- [[B.]] To delay download of telemetry between satellites
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- [[C.]] To hold digital messages in the satellite for later download
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- [[D.]] To relay messages between satellites
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--
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- [[E2A13]] Question Deleted (section not renumbered)
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~~
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E2B Television practices: fast-scan television standards and techniques; slow scan television standards and techniques
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92
logseq/bak/pages/E2A/2025-05-01T20_36_51.617Z.Desktop.md
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92
logseq/bak/pages/E2A/2025-05-01T20_36_51.617Z.Desktop.md
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@ -0,0 +1,92 @@
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E2A Amateur radio in space: amateur satellites; orbital mechanics; frequencies and modes; satellite hardware; satellite operations
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- [[E2A01]] (C)
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What is the direction of an ascending pass for an amateur satellite? #card
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- [[A.]] From west to east
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- [[B.]] From east to west
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- [[C.]] From south to north
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- [[D.]] From north to south
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--
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- [[E2A02]] (D)
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Which of the following is characteristic of an inverting linear transponder? #card
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- [[A.]] Doppler shift is reduced because the uplink and downlink shifts are in opposite directions
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- [[B.]] Signal position in the band is reversed
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- [[C.]] Upper sideband on the uplink becomes lower sideband on the downlink, and vice versa
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- [[D.]] All these choices are correct
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--
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- [[E2A03]] (D)
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How is an upload signal processed by an inverting linear transponder? #card
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- [[A.]] The signal is detected and remodulated on the reverse sideband
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- [[B.]] The signal is passed through a nonlinear filter
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- [[C.]] The signal is reduced to I and Q components, and the Q component is filtered out
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- [[D.]] The signal is mixed with a local oscillator signal and the difference product is transmitted
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--
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- [[E2A04]] (B)
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What is meant by the “mode” of an amateur radio satellite? #card
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- [[A.]] Whether the satellite is in a low earth or geostationary orbit
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- [[B.]] The satellite’s uplink and downlink frequency bands
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- [[C.]] The satellite’s orientation with respect to the Earth
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- [[D.]] Whether the satellite is in a polar or equatorial orbit
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--
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- [[E2A05]] (D)
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What do the letters in a satellite’s mode designator specify? #card
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- [[A.]] Power limits for uplink and downlink transmissions
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- [[B.]] The location of the ground control station
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- [[C.]] The polarization of uplink and downlink signals
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- [[D.]] The uplink and downlink frequency ranges
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--
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- [[E2A06]] (A)
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What are Keplerian elements? #card
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- [[A.]] Parameters that define the orbit of a satellite
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- [[B.]] Phase reversing elements in a Yagi antenna
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- [[C.]] High-emission heater filaments used in magnetron tubes
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- [[D.]] Encrypting codes used for spread spectrum modulation
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--
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- [[E2A07]] (D)
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Which of the following types of signals can be relayed through a linear transponder? #card
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- [[A.]] FM and CW
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- [[B.]] SSB and SSTV
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- [[C.]] PSK and packet
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- [[D.]] All these choices are correct
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--
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- [[E2A08]] (B)
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Why should effective radiated power (ERP) be limited to a satellite that uses a linear transponder? #card
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- [[A.]] To prevent creating errors in the satellite telemetry
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- [[B.]] To avoid reducing the downlink power to all other users
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- [[C.]] To prevent the satellite from emitting out-of-band signals
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- [[D.]] To avoid interfering with terrestrial QSOs
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--
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- [[E2A09]] (A)
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What do the terms “L band” and “S band” specify? #card
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- [[A.]] The 23- and 13-centimeter bands
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- [[B.]] The 2-meter and 70-centimeter bands
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- [[C.]] FM and digital store-and-forward systems
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- [[D.]] Which sideband to use
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--
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- [[E2A10]] (B)
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What type of satellite appears to stay in one position in the sky? #card
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- [[A.]] HEO
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- [[B.]] Geostationary
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- [[C.]] Geomagnetic
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- [[D.]] LEO
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--
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- [[E2A11]] (B)
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What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation? #card
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- [[A.]] A linearly polarized antenna
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- [[B.]] A circularly polarized antenna
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- [[C.]] An isotropic antenna
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- [[D.]] A log-periodic dipole array
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--
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- [[E2A12]] (C)
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What is the purpose of digital store-and-forward functions on an amateur radio satellite? #card
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- [[A.]] To upload operational software for the transponder
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- [[B.]] To delay download of telemetry between satellites
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- [[C.]] To hold digital messages in the satellite for later download
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- [[D.]] To relay messages between satellites
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--
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- [[E2A13]] Question Deleted (section not renumbered)
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~~
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E2B Television practices: fast-scan television standards and techniques; slow scan television standards and techniques
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