Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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T8D01 Which of the following is a digital
communications mode?
a. | Packet radio | c. | JT65 | b. | IEEE
802.11 | d. | All of these choices are correct |
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2.
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T8D02 What does the term "APRS"
mean?
a. | Automatic Packet Reporting System | c. | Auto Planning Radio Set-up | b. | Associated Public Radio Station | d. | Advanced Polar
Radio System |
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3.
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T8D03 Which of the following devices is used
to provide data to the transmitter when sending automatic position reports from a mobile amateur
radio station?
a. | The vehicle speedometer | c. | A connection to a broadcast FM sub-carrier receiver | b. | A WWV receiver | d. | A Global
Positioning System receiver |
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4.
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T8D04 What type of transmission is indicated
by the term "NTSC"?
a. | A Normal Transmission mode in Static
Circuit | c. | An analog fast scan color TV
signal | b. | A special mode for earth satellite
uplink | d. | A frame compression scheme for TV
signals |
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5.
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T8D05 Which of the following is an
application of APRS (Automatic Packet Reporting System)?
a. | Providing real-time tactical digital communications in
conjunction with a map showing the locations of stations | c. | Providing voice over internet connection between
repeaters | b. | Showing automatically the number of packets transmitted
via PACTOR during a specific time interval | d. | Providing
information on the number of stations signed into a repeater |
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6.
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T8D06 What does the abbreviation "PSK"
mean?
a. | Pulse Shift Keying | c. | Packet
Short Keying | b. | Phase Shift
Keying | d. | Phased Slide Keying |
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7.
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T8D07 Which of the following best describes
DMR (Digital Mobile Radio)?
a. | A technique for time-multiplexing two digital voice
signals on a single 12.5 kHz repeater channel | c. | An
automatic computer logging technique for hands-off logging when communicating while operating a
vehicle | b. | An automatic position tracking mode for FM mobiles
communicating through repeaters | d. | A digital technique for transmitting on two repeater
inputs simultaneously for automatic error correction |
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8.
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T8D08 Which of the following may be included
in packet transmissions?
a. | A check sum that permits error
detection | c. | Automatic repeat request in case of
error | b. | A header that contains the call sign of the station to
which the information is being sent | d. | All of these choices are
correct |
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9.
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T8D09 What code is used when sending CW in the
amateur bands?
a. | Baudot | c. | International Morse | b. | Hamming | d. | All of these choices are
correct |
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10.
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T8D10 Which of the following operating activities
is supported by digital mode software in the WSJT suite?
a. | Moonbounce or Earth-Moon-Earth | c. | Meteor scatter | b. | Weak-signal
propagation beacons | d. | All of these choices are
correct |
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11.
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T8D11 What is an ARQ transmission
system?
a. | A special transmission format limited to video
signals | c. | A digital scheme whereby the receiving station detects
errors and sends a request to the sending station to retransmit the
information | b. | A system used to
encrypt command signals to an amateur radio satellite | d. | A method of
compressing the data in a message so more information can be sent in a shorter
time |
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12.
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T8D12 Which of the following best describes
Broadband-Hamnet(TM), also referred to as a high-speed multi-media network?
a. | An amateur-radio-based data network using commercial
Wi-Fi gear with modified Firmware | c. | A
satellite communications network using modified commercial satellite TV
hardware | b. | A wide-bandwidth digital voice mode employing DRM
protocols | d. | An internet linking protocol used to network
repeaters |
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13.
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a. | A wideband FM voice mode | c. | An eight channel multiplex mode for FM repeaters | b. | A digital mode capable of operating in Ion signal-to-noise conditions that
transmits on 15-second intervals | d. | A digital slow scan TV mode with forward error
correction and automatic color compensation |
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14.
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T8D14 What is an electronic keyer?
a. | A device for switching antennas from transmit to
receive | c. | A device that assists in manual sending of Morse
code | b. | A device for voice activated switching from receive to
transmit | d. | An interlock to prevent unauthorized use of a
radio |
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