93 lines
4.1 KiB
Markdown
93 lines
4.1 KiB
Markdown
G2E – Digital mode operating procedures
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- [[G2E01]] (D)
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Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter? #card
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- A. USB
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- B. DSB
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- C. CW
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- D. LSB
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- [[G2E02]] (B)
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What is VARA? #card
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- A. A low signal-to-noise digital mode used for EME (moonbounce)
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- B. A digital protocol used with Winlink
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- C. A radio direction finding system used on VHF and UHF
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- D.A DX spotting system using a network of software defined radios
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- [[G2E03]] (D)
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What symptoms may result from other signals interfering with a PACTOR or VARA transmission? #card
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- A. Frequent retries or timeouts
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- B. Long pauses in message transmission
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- C. Failure to establish a connection between stations
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- D. All these choices are correct
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- [[G2E04]] (D)
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Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8? #card
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- A. Always call on the station’s frequency
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- B. Call on any frequency in the waterfall except the station’s frequency
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- C. Find a clear frequency during the same time slot as the calling station
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- D. Find a clear frequency during the alternate time slot to the calling station
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- [[G2E05]] (B)
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What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK? #card
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- A. LSB
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- B. USB
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- C. DSB
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- D. SSB
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- [[G2E06]] (B)
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What is the most common frequency shift for RTTY emissions in the amateur HF bands? #card
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- A. 85 Hz
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- B. 170 Hz
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- C. 425 Hz
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- D. 850 Hz
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- [[G2E07]] (B)
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Which of the following is required when using FT8? #card
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- A. A special hardware modem
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- B. Computer time accurate to within approximately 1 second
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- C. Receiver attenuator set to -12 dB
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- D. A vertically polarized antenna
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- [[G2E08]] (D)
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In what segment of the 20-meter band are most digital mode operations commonly found? #card
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- A. At the bottom of the slow-scan TV segment, near 14.230 MHz
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- B. At the top of the SSB phone segment, near 14.325 MHz
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- C. In the middle of the CW segment, near 14.100 MHz
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- D. Between 14.070 MHz and 14.100 MHz
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- [[G2E09]] (C)
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How do you join a contact between two stations using the PACTOR protocol? #card
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- A. Send broadcast packets containing your call sign while in MONITOR mode
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- B. Transmit a steady carrier until the PACTOR protocol times out and disconnects
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- C. Joining an existing contact is not possible, PACTOR connections are limited to two stations
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- D. Send a NAK code
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- [[G2E10]] (D)
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Which of the following is a way to establish contact with a digital messaging system gateway station? #card
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- A. Send an email to the system control operator
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- B. Send QRL in Morse code
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- C. Respond when the station broadcasts its SSID
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- D. Transmit a connect message on the station’s published frequency
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- [[G2E11]] (C)
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What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network? #card
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- A. To provide FM repeater coverage in remote areas
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- B. To provide real time propagation data by monitoring amateur radio transmissions worldwide
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- C. To provide high-speed data services during an emergency or community event
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- D. To provide DX spotting reports to aid contesters and DXers
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- [[G2E12]] (D)
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Which of the following describes Winlink? #card
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- A. An amateur radio wireless network to send and receive email on the internet
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- B. A form of Packet Radio
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- C. A wireless network capable of both VHF and HF band operation
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- D. All of the above
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- [[G2E13]] (B)
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What is another name for a Winlink Remote Message Server? #card
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- A. Terminal Node Controller
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- B. Gateway
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- C. RJ-45
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- D. Printer/Server
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- [[G2E14]] (D)
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What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly? #card
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- A. The mark and space frequencies may be reversed
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- B. You may have selected the wrong baud rate
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- C. You may be listening on the wrong sideband
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- D. All these choices are correct
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- [[G2E15]] (C)
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Which of the following is a common location for FT8? #card
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- A. Anywhere in the voice portion of the band
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- B. Anywhere in the CW portion of the band
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- C. Approximately 14.074 MHz to 14.077 MHz
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- D. Approximately 14.110 MHz to 14.113 MHz
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