Changes

Ham Radio Exam Questions- Extra Class

1,765 bytes added, 03:02, 4 May 2017
/* E2B */
The following lines were added (+) and removed (-):
==E2B=====E2B===E2B01 - How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?*A. 30E2B02 - How many horizontal lines make up a fast-scan (NTSC) television frame?*C. 525E2B03 - How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?*D. By scanning odd numbered lines in one field and even numbered lines in the nextE2B04 - What is blanking in a video signal?*B. Turning off the scanning beam while it is traveling from right to left or from bottom to topE2B05 - Which of the following is an advantage of using vestigial sideband for standard fast- scan TV transmissions?*C. Vestigial sideband reduces bandwidth while allowing for simple video detector circuitryE2B06 - What is vestigial sideband modulation?*A. Amplitude modulation in which one complete sideband and a portion of the other are transmittedE2B07 - What is the name of the signal component that carries color information in NTSC video?*B. ChromaE2B08 - Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?*D. All of these choices are correct: Frequency-modulated sub-carrier, A separate VHF or UHF audio link, Frequency modulation of the video carrierE2B09 - What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?*D. No other hardware is neededE2B10 - 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?*A. 3 KHzE2B11 - What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission?*B. To identify the SSTV mode being used       
Administrator
4,579
edits