What is the direction of an ascending pass for an amateur satellite?
CFrom south to north
extra pool
Subelement E2 question review
All 60 official questions with the exact winning phrase marked.
Which of the following is characteristic of an inverting linear transponder?
DAll these choices are correct
How is an upload signal processed by an inverting linear transponder?
DThe signal is mixed with a local oscillator signal and the difference product is transmitted
What is meant by the “mode” of an amateur radio satellite?
BThe satellite’s uplink and downlink frequency bands
What do the letters in a satellite’s mode designator specify?
DThe uplink and downlink frequency ranges
What are Keplerian elements?
AParameters that define the orbit of a satellite
Which of the following types of signals can be relayed through a linear transponder?
DAll these choices are correct
Why should effective radiated power (ERP) be limited to a satellite that uses a linear transponder?
BTo avoid reducing the downlink power to all other users
What do the terms “L band” and “S band” specify?
AThe 23- and 13-centimeter bands
What type of satellite appears to stay in one position in the sky?
BGeostationary
What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?
BA circularly polarized antenna
What is the purpose of digital store-and-forward functions on an amateur radio satellite?
CTo hold digital messages in the satellite for later download
In digital television, what does a coding rate of 3/4 mean?
A25% of the data sent is forward error correction data
How many horizontal lines make up a fast-scan (NTSC) television frame?
C525
How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?
DBy scanning odd-numbered lines in one field and even-numbered lines in the next
How is color information sent in analog SSTV?
AColor lines are sent sequentially
Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?
CVestigial sideband reduces the bandwidth while increasing the fidelity of low frequency video components
What is vestigial sideband modulation?
AAmplitude modulation in which one complete sideband and a portion of the other are transmitted
Which types of modulation are used for amateur television DVB-T signals?
BQAM and QPSK
What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?
ATransmitting on channels shared with cable TV
What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?
DSSB
What aspect of an analog slow-scan television signal encodes the brightness of the picture?
ATone frequency
What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission?
BTo identify the SSTV mode being used
What signals SSTV receiving software to begin a new picture line?
ASpecific tone frequencies
What indicator is required to be used by US-licensed operators when operating a station via remote control and the remote transmitter is located in the US?
DNo additional indicator is required
Which of the following file formats is used for exchanging amateur radio log data?
CADIF
From which of the following bands is amateur radio contesting generally excluded?
A30 meters
Which of the following frequencies can be used for amateur radio mesh networks?
BFrequencies shared with various unlicensed wireless data services
What is the function of a DX QSL Manager?
BHandle the receiving and sending of confirmations for a DX station
During a VHF/UHF contest, in which band segment would you expect to find the highest level of SSB or CW activity?
CIn the weak signal segment of the band, with most of the activity near the calling frequency
What is the Cabrillo format?
AA standard for submission of electronic contest logs
Which of the following contacts may be confirmed through the Logbook of The World (LoTW)?
DAll these choices are correct
What type of equipment is commonly used to implement an amateur radio mesh network?
CA wireless router running custom firmware
Why do DX stations often transmit and receive on different frequencies?
DAll these choices are correct
How should you generally identify your station when attempting to contact a DX station during a contest or in a pileup?
ASend your full call sign once or twice
What indicates the delay between a control operator action and the corresponding change in the transmitted signal?
CLatency
Which of the following digital modes is designed for meteor scatter communications?
BMSK144
What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest?
DGrid square
Which of the following digital modes is designed for EME communications?
DQ65
What technology is used for real-time tracking of balloons carrying amateur radio transmitters?
CAPRS
What is the characteristic of the JT65 mode?
BDecodes signals with a very low signal-to-noise ratio
Which of the following is a method for establishing EME contacts?
ATime-synchronous transmissions alternating between stations
What digital protocol is used by APRS?
CAX.25
What type of packet frame is used to transmit APRS beacon data?
CUnnumbered Information
What type of modulation is used by JT65?
AMultitone AFSK
What does the packet path WIDE3-1 designate?
CThree digipeater hops are requested with one remaining
How do APRS stations relay data?
DBy packet digipeaters
Which of the following types of modulation is used for data emissions below 30 MHz?
BFSK
Which of the following synchronizes WSJT-X digital mode transmit/receive timing?
BSynchronization of computer clocks
To what does the "4" in FT4 refer?
BFour-tone continuous-phase frequency shift keying
Which of the following is characteristic of the FST4 mode?
DAll these choices are correct
Which of these digital modes does not support keyboard-to-keyboard operation?
AWSPR
What is the length of an FT8 transmission cycle?
C15 seconds
How does Q65 differ from JT65?
CMultiple receive cycles are averaged
Which of the following HF digital modes can be used to transfer binary files?
BPACTOR
Which of the following HF digital modes uses variable-length character coding?
DPSK31
Which of these digital modes has the narrowest bandwidth?
CFT8
What is the difference between direct FSK and audio FSK?
ADirect FSK modulates the transmitter VFO
How do ALE stations establish contact?
AALE constantly scans a list of frequencies, activating the radio when the designated call sign is received
Which of these digital modes has the highest data throughput under clear communication conditions?
DPACTOR IV