69 lines
2.4 KiB
Markdown
69 lines
2.4 KiB
Markdown
E2D Operating methods: digital modes and procedures for VHF and UHF; APRS; EME procedures; meteor scatter procedures
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- [[E2D01]] (B)
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Which of the following digital modes is designed for meteor scatter communications? #card
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- [[A.]] WSPR
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- [[B.]] MSK144
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- [[C.]] Hellschreiber
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- [[D.]] APRS
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- [[E2D02]] (D)
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What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest? #card
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- [[A.]] RST report
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- [[B.]] State abbreviation
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- [[C.]] Serial number
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- [[D.]] Grid square
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- [[E2D03]] (D)
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Which of the following digital modes is designed for EME communications? #card
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- [[A.]] MSK144
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- [[B.]] PACTOR III
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- [[C.]] WSPR
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- [[D.]] Q65
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- [[E2D04]] (C)
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What technology is used for real-time tracking of balloons carrying amateur radio transmitters? #card
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- [[A.]] FT8
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- [[B.]] Bandwidth compressed LORAN
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- [[C.]] APRS
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- [[D.]] PACTOR III
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- [[E2D05]] (B)
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What is the characteristic of the JT65 mode? #card
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- [[A.]] Uses only a 65 Hz bandwidth
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- [[B.]] Decodes signals with a very low signal-to-noise ratio
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- [[C.]] Symbol rate is 65 baud
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- [[D.]] Permits fast-scan TV transmissions over narrow bandwidth
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- [[E2D06]] (A)
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Which of the following is a method for establishing EME contacts? #card
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- [[A.]] Time-synchronous transmissions alternating between stations
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- [[B.]] Storing and forwarding digital messages
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- [[C.]] Judging optimum transmission times by monitoring beacons reflected from the moon
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- [[D.]] High-speed CW identification to avoid fading
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- [[E2D07]] (C)
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What digital protocol is used by APRS? #card
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- [[A.]] PACTOR
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- [[B.]] QAM
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- [[C.]] AX.25
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- [[D.]] AMTOR
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- [[E2D08]] (C)
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What type of packet frame is used to transmit APRS beacon data? #card
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- [[A.]] Acknowledgement
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- [[B.]] Burst
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- [[C.]] Unnumbered Information
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- [[D.]] Connect
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- [[E2D09]] (A)
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What type of modulation is used by JT65? #card
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- [[A.]] Multitone AFSK
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- [[B.]] PSK
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- [[C.]] RTTY
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- [[D.]] QAM
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- [[E2D10]] (C)
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What does the packet path WIDE3-1 designate? #card
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- [[A.]] Three stations are allowed on frequency, one transmitting at a time
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- [[B.]] Three subcarriers are permitted, subcarrier one is being used
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- [[C.]] Three digipeater hops are requested with one remaining
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- [[D.]] Three internet gateway stations may receive one transmission
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- [[E2D11]] (D)
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How do APRS stations relay data? #card
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- [[A.]] By packet ACK/NAK relay
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- [[B.]] By C4FM repeaters
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- [[C.]] By DMR repeaters
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- [[D.]] By packet digipeaters
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