E2B01

How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

  1. 30

E2B02

How many horizontal lines make up a fast-scan (NTSC) television frame?

  1. 525

E2B03

How is an interlace scanning pattern generated in a fast-scan (NTSC) television system?

  1. By scanning odd numbered lines in one field and even numbered ones in the next

E2B04

What is blanking in a video signal?

  1. Turning off the scanning beam while it is traveling from right to left or from bottom to top

E2B05

Which of the following is an advantage of using vestigial sideband for standard fast scan TV transmissions?

  1. Vestigial sideband reduces bandwidth while allowing for simple video detector circuitry

E 2B06 (A)

What is vestigial sideband modulation?

  1. Amplitude modulation in which one complete sideband and a portion of the other sideband is transmitted

E 2B07

What is the name of the video signal component that carries color information?

  1. Chroma

E 2B08

Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?

  1. A. Frequency-modulated sub-carrier
  2. B. A separate VHF or UHF audio link
  3. C. Frequency modulation of the video carrier
  4. D. All of these choices are correct

E2B09

What hardware, other than a transceiver with SSB capability and a suitable computer, is needed to decode SSTV based on Digital Radio Mondiale (DRM)?

  1. No other hardware is needed

E2B10

Which of the following is an acceptable bandwidth for Digital Radio Mondiale (DRM) based voice or SSTV digital transmissions made on the HF amateur bands?

  1. 3 KHz

E2B11

What is the function of the Vertical Interval Signaling (VIS) code transmitted as part of an SSTV transmission?

  1. To identify the SSTV mode being used

E2B12

How are analog slow-scan television images typically transmitted on the HF bands?

  1. Varying tone frequencies representing the video are transmitted using single sideband

E2B13

How many lines are commonly used in each frame on an amateur slow-scan color television picture?

  1. 128 or 256

E2B14

What aspect of an amateur slow-scan television signal encodes the brightness of the picture?

  1. Tone frequency

E2B15

What signals SSTV receiving equipment to begin a new picture line?

  1. Specific tone frequencies

E2B16

Which of the following is the video standard used by North American Fast Scan ATV stations?

  1. NTSC

E 2B17

Which of the following is NOT a characteristic of FMTV (Frequency-Modulated Amateur Television) as compared to vestigial sideband AM television?

  1. Immunity from fading due to limiting

E2B18

What is the approximate bandwidth of a slow-scan TV signal?

  1. 3 kHz

E2B19

On which of the following frequencies is one likely to find FMTV transmissions?

  1. 1255 MHz

E2B20 (C)

What special operating frequency restrictions are imposed on slow scan TV transmissions?

  1. They are restricted to phone band segments and their bandwidth can be no greater than that of a voice signal of the same modulation type

E2B21

If 100 IRE units correspond to the most-white level in the NTSC standard video format, what is the level of the most-black signal?

  1. 7.5 IRE units

 

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