Extra-Study/pages/E2B.md

E2B Television practices: fast-scan television standards and techniques; slow scan television standards and techniques

• E2B01 (A) In digital television, what does a coding rate of 3/4 mean? #card
  • A. 25% of the data sent is forward error correction data
  • B. Data compression reduces data rate by 3/4
  • C. 1/4 of the time interval is used as a guard interval
  • D. Three, four-bit words are used to transmit each pixel
• E2B02 (C) How many horizontal lines make up a fast-scan (NTSC) television frame? #card
  • A. 30
  • B. 60
  • C. 525
  • D. 1080
• E2B03 (D) How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system? #card
  • 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
• E2B04 (A) How is color information sent in analog SSTV? #card
  • 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
• E2B05 (C) Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions? #card
  • A. The vestigial sideband carries the audio information
  • B. The vestigial sideband contains chroma information
  • C. Vestigial sideband reduces the bandwidth while increasing the fidelity of low frequency video components
  • D. Vestigial sideband provides high frequency emphasis to sharpen the picture
• E2B06 (A) What is vestigial sideband modulation? #card
  • 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
• E2B07 (B) Which types of modulation are used for amateur television DVB-T signals? #card
  • A. FM and FSK
  • B. QAM and QPSK
  • C. AM and OOK
  • D. All these choices are correct
• E2B08 (A) What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band? #card
  • 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
• E2B09 (D) What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol? #card
  • A. CDMA
  • B. AREDN
  • C. AM
  • D. SSB
• E2B10 (A) What aspect of an analog slow-scan television signal encodes the brightness of the picture? #card
  • A. Tone frequency
  • B. Tone amplitude
  • C. Sync amplitude
  • D. Sync frequency
• E2B11 (B) What is the function of the vertical interval signaling (VIS) code sent as part of an SSTV transmission? #card
  • 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
• E2B12 (A) What signals SSTV receiving software to begin a new picture line? #card
  • A. Specific tone frequencies
  • B. Elapsed time
  • C. Specific tone amplitudes
  • D. A two-tone signal