FCC Technician Class Exam Study Guide - 2014-2018/Subelement T8 Group D
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Non-voice communications: image signals; digital modes; CW; packet; PSK31; APRS; error detection and correction; NTSC
The Question Pool[edit | edit source]
Question 1[edit | edit source]
- Which of the following is an example of a digital communications method?
- A. Packet
- B. PSK31
- C. MFSK
- D. All of these choices are correct
The correct answer is D.
Question 2[edit | edit source]
- What does the term "APRS" mean?
- A. Automatic Packet Reporting System
- B. Associated Public Radio Station
- C. Auto Planning Radio Set-up
- D. Advanced Polar Radio System
The correct answer is A.
Question 3[edit | edit source]
- Which of the following devices provides data to the transmitter when sending automatic position reports from a mobile amateur radio station?
- A. The vehicle speedometer
- B. A WWV receiver
- C. A connection to a broadcast FM sub-carrier receiver
- D. A Global Positioning System receiver
The correct answer is D.
Question 4[edit | edit source]
- What type of transmission is indicated by the term NTSC?
- A. A Normal Transmission mode in Static Circuit
- B. A special mode for earth satellite uplink
- C. An analog fast scan color TV signal
- D. A frame compression scheme for TV signals
The correct answer is C.
Question 5[edit | edit source]
- 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
- B. Showing automatically the number of packets transmitted via PACTOR during a specific time interval
- C. Providing voice over Internet connection between repeaters
- D. Providing information on the number of stations signed into a repeater
The correct answer is A.
Question 6[edit | edit source]
- What does the abbreviation PSK mean?
- A. Pulse Shift Keying
- B. Phase Shift Keying
- C. Packet Short Keying
- D. Phased Slide Keying
The correct answer is B.
Question 7[edit | edit source]
- What is PSK31?
- A. A high-rate data transmission mode
- B. A method of reducing noise interference to FM signals
- C. A method of compressing digital television signals
- D. A low-rate data transmission mode
The correct answer is D.
Question 8[edit | edit source]
- Which of the following may be included in packet transmissions?
- A. A check sum which permits error detection
- B. A header which contains the call sign of the station to which the information is being sent
- C. Automatic repeat request in case of error
- D. All of these choices are correct
The correct answer is D.
Question 9[edit | edit source]
- What code is used when sending CW in the amateur bands?
- A. Baudot
- B. Hamming
- C. International Morse
- D. Gray
The correct answer is C.
Question 10[edit | edit source]
- Which of the following can be used to transmit CW in the amateur bands?
- A. Straight Key
- B. Electronic Keyer
- C. Computer Keyboard
- D. All of these choices are correct
The correct answer is D.
Question 11[edit | edit source]
- What is an ARQ transmission system?
- A. A special transmission format limited to video signals
- B. A system used to encrypt command signals to an amateur radio satellite
- C. A digital scheme whereby the receiving station detects errors and sends a request to the sending station to retransmit the information
- D. A method of compressing the data in a message so more information can be sent in a shorter time
The correct answer is C.