E2 - OPERATING PROCEDURES [5 Exam Questions - 5 Groups] 61 Questions Flashcards
“What is the direction of an ascending pass for an amateur satellite?”
A. From west to east
B. From east to west
C. From south to north
D. From north to south
C. From south to north
“Which of the following occurs when a satellite is using an inverting linear transponder?”
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
D. All these choices are correct
“How is the signal inverted by an inverting linear transponder?”
A. The signal is detected and remodulated on the reverse sideband
B. The signal is passed through a non-linear filter
C. The signal is reduced to I and Q components and the Q component is filtered out
D. The signal is passed through a mixer and the difference rather than the sum is transmitted
D. The signal is passed through a mixer and the difference rather than the sum is transmitted
“What is meant by the term “mode” as applied to an amateur radio satellite?”
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
B. The satellite’s uplink and downlink frequency bands
“What do the letters in a satellite’s mode designator specify?”
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
D. The uplink and downlink frequency ranges
“What are Keplerian elements?”
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
A. Parameters that define the orbit of a satellite
“Which of the following types of signals can be relayed through a linear transponder?”
A. FM and CW
B. SSB and SSTV
C. PSK and packet
D. All these choices are correct
D. All these choices are correct
“Why should effective radiated power to a satellite that uses a linear transponder be limited?”
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
B. To avoid reducing the downlink power to all other users
“What do the terms “L band” and “S band” specify regarding satellite communications?”
A. The 23 centimeter 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
A. The 23 centimeter and 13 centimeter bands
“What type of satellite appears to stay in one position in the sky?”
A. HEO
B. Geostationary
C. Geomagnetic
D. LEO
B. Geostationary
“What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?”
A. A linearly polarized antenna
B. A circularly polarized antenna
C. An isotropic antenna
D. A log-periodic dipole array
B. A circularly polarized antenna
“What is the purpose of digital store-and-forward functions on an amateur radio satellite?”
A. To upload operational software for the transponder
B. To delay download of telemetry between satellites
C. To store digital messages in the satellite for later download by other stations
D. To relay messages between satellites
C. To store digital messages in the satellite for later download by other stations
“Which of the following techniques is normally used by low Earth orbiting digital satellites to relay messages around the world?”
A. Digipeating
B. Store-and-forward
C. Multi-satellite relaying
D. Node hopping
B. Store-and-forward
“How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?”
A. 30
B. 60
C. 90
D. 120
A. 30
“How many horizontal lines make up a fast-scan (NTSC) television frame?”
A. 30
B. 60
C. 525
D. 1080
C. 525
“How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?”
A. By scanning two fields simultaneously
B. By scanning each field from bottom to top
C. By scanning lines from left to right in one field and right to left in the next
D. By scanning odd numbered lines in one field and even numbered lines in the next
D. By scanning odd numbered lines in one field and even numbered lines in the next
“How is color information sent in analog SSTV?”
A. Color lines are sent sequentially
B. Color information is sent on a 2.8 kHz subcarrier
C. Color is sent in a color burst at the end of each line
D. Color is amplitude modulated on the frequency modulated intensity signal
A. Color lines are sent sequentially
“Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?”
A. The vestigial sideband carries the audio information
B. The vestigial sideband contains chroma information
C. Vestigial sideband reduces bandwidth while allowing for simple video detector circuitry
D. Vestigial sideband provides high frequency emphasis to sharpen the picture
C. Vestigial sideband reduces bandwidth while allowing for simple video detector circuitry
“What is vestigial sideband modulation?”
A. Amplitude modulation in which one complete sideband and a portion of the other are transmitted
B. A type of modulation in which one sideband is inverted
C. Narrow-band FM modulation achieved by filtering one sideband from the audio before frequency modulating the carrier
D. Spread spectrum modulation achieved by applying FM modulation following single sideband amplitude modulation
A. Amplitude modulation in which one complete sideband and a portion of the other are transmitted
“What is the name of the signal component that carries color information in NTSC video?”
A. Luminance
B. Chroma
C. Hue
D. Spectral intensity
B. Chroma
“What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70 cm band?”
A. Transmitting on channels shared with cable TV
B. Using converted satellite TV dishes
C. Transmitting on the abandoned TV channel 2
D. Using USB and demodulating the signal with a computer sound card
A. Transmitting on channels shared with cable TV
“What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?”
A. A special IF converter
B. A special front end limiter
C. A special notch filter to remove synchronization pulses
D. No other hardware is needed
D. No other hardware is needed
“What aspect of an analog slow-scan television signal encodes the brightness of the picture?”
A. Tone frequency
B. Tone amplitude
C. Sync amplitude
D. Sync frequency
A. Tone frequency
“What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission?”
A. To lock the color burst oscillator in color SSTV images
B. To identify the SSTV mode being used
C. To provide vertical synchronization
D. To identify the call sign of the station transmitting
B. To identify the SSTV mode being used