US_EXTRA
Amateur Extra - Operating procedures and special operations
Operating procedures and special operations groups the E2 section questions for focused review and easier weak-point tracking.
60
Questions
9
Sibling Topics
- Pool
- Amateur Extra
- Questions
- 60
- Topic
- Operating procedures and special operations
- Region
- US
Read the condition in the stem before comparing key terms in the options.
Study rules, calculations, and equipment questions as separate patterns.
After this topic, return to the full pool for mixed practice.
Topic Study Guide
This topic covers advanced operating procedures, focusing on satellite communications, amateur television (ATV/SSTV), contesting rules, and specialized digital modes like EME and meteor scatter.
High-Yield Checks
- Satellite basics: Know ascending passes (South to North), mode designators (uplink/downlink frequencies), inverting transponders (LO mixing, difference product), and circular polarization (mitigates Faraday rotation).
- Amateur TV (ATV/SSTV): Differentiate analog NTSC (odd/even interlacing, vestigial sideband for bandwidth) from digital DVB-T (QAM/QPSK). Remember the VIS code in SSTV identifies the mode.
- Digital mode mapping: Match modes to their use cases. MSK144 is for meteor scatter, Q65 for EME, JT65 for very low SNR, and APRS uses the AX.25 protocol.
- Contesting & DXing: Know the Cabrillo log format, the role of a DX QSL manager (handling confirmations), pileup etiquette (full call sign 1-2 times), and that contesting is excluded from WARC bands like 30 meters.
Trap Patterns
- Confusing satellite band letters. L and S bands refer to 23-cm and 13-cm bands, not the common VHF/UHF bands.
- Misinterpreting digital TV coding rates. '3/4' means 3 payload bits out of 4 total, meaning 25% is Forward Error Correction (FEC), not a compression ratio.
- Mixing up weak-signal digital modes. It's easy to confuse WSPR or JT65 with meteor scatter; remember meteor scatter requires a high-speed burst mode (MSK144).
- Assuming remote control requires a special call sign suffix. The FCC requires no additional indicator for remote transmitters located in the US.
Review Steps
- Step 1: Group satellite concepts. Make a cheat sheet for orbit directions, transponder mechanics, and microwave band letters (L/S bands).
- Step 2: Compare amateur TV standards. List the technical differences between analog (NTSC/vestigial sideband) and digital TV (DVB-T/FEC/QAM).
- Step 3: For digital modes, use a 'mode-to-purpose' matching technique (e.g., MSK144-Meteor, Q65-EME, APRS-AX.25).
- Step 4: Review contest and DX etiquette, focusing on the Cabrillo format, QSL manager definitions, and contest-free bands (30 meters).
Quick Checks
- What is the direction of an ascending pass for an amateur satellite?
- Which digital mode is designed for meteor scatter communications?
- In digital television, what does a coding rate of 3/4 mean?
- What digital protocol is used by APRS?
- From which band is amateur radio contesting generally excluded?
Questions in This Topic
Choose Practice ModeE2A01What is the direction of an ascending pass for an amateur satellite?E2A02Which of the following is characteristic of an inverting linear transponder?E2A03How is an upload signal processed by an inverting linear transponder?E2A04What is meant by the “mode” of an amateur radio satellite?E2A05What do the letters in a satellite’s mode designator specify?E2A06What are Keplerian elements?E2A07Which of the following types of signals can be relayed through a linear transponder?E2A08Why should effective radiated power (ERP) be limited to a satellite that uses a linear transponder?E2A09What do the terms “L band” and “S band” specify?E2A10What type of satellite appears to stay in one position in the sky?E2A11What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?E2A12What is the purpose of digital store-and-forward functions on an amateur radio satellite?E2B01In digital television, what does a coding rate of 3/4 mean?E2B02How many horizontal lines make up a fast-scan (NTSC) television frame?E2B03How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?E2B04How is color information sent in analog SSTV?E2B05Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?E2B06What is vestigial sideband modulation?E2B07Which types of modulation are used for amateur television DVB-T signals?E2B08What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?E2B09What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?E2B10What aspect of an analog slow-scan television signal encodes the brightness of the picture?E2B11What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission?E2B12What signals SSTV receiving software to begin a new picture line?E2C01What 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?E2C02Which of the following file formats is used for exchanging amateur radio log data?E2C03From which of the following bands is amateur radio contesting generally excluded?E2C04Which of the following frequencies can be used for amateur radio mesh networks?E2C05What is the function of a DX QSL Manager?E2C06During a VHF/UHF contest, in which band segment would you expect to find the highest level of SSB or CW activity?E2C07What is the Cabrillo format?E2C08Which of the following contacts may be confirmed through the Logbook of The World (LoTW)?E2C09What type of equipment is commonly used to implement an amateur radio mesh network?E2C10Why do DX stations often transmit and receive on different frequencies?E2C11How should you generally identify your station when attempting to contact a DX station during a contest or in a pileup?E2C12What indicates the delay between a control operator action and the corresponding change in the transmitted signal?E2D01Which of the following digital modes is designed for meteor scatter communications?E2D02What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest?E2D03Which of the following digital modes is designed for EME communications?E2D04What technology is used for real-time tracking of balloons carrying amateur radio transmitters?E2D05What is the characteristic of the JT65 mode?E2D06Which of the following is a method for establishing EME contacts?E2D07What digital protocol is used by APRS?E2D08What type of packet frame is used to transmit APRS beacon data?E2D09What type of modulation is used by JT65?E2D10What does the packet path WIDE3-1 designate?E2D11How do APRS stations relay data?E2E01Which of the following types of modulation is used for data emissions below 30 MHz?E2E02Which of the following synchronizes WSJT-X digital mode transmit/receive timing?E2E03To what does the "4" in FT4 refer?E2E04Which of the following is characteristic of the FST4 mode?E2E05Which of these digital modes does not support keyboard-to-keyboard operation?E2E06What is the length of an FT8 transmission cycle?E2E07How does Q65 differ from JT65?E2E08Which of the following HF digital modes can be used to transfer binary files?E2E09Which of the following HF digital modes uses variable-length character coding?E2E10Which of these digital modes has the narrowest bandwidth?E2E11What is the difference between direct FSK and audio FSK?E2E12How do ALE stations establish contact?E2E13Which of these digital modes has the highest data throughput under clear communication conditions?