Q237.
In a 6/4-GHz heavy-route system, each satellite channel (bandwidth 36 MHz) is capable of
carrying ________________simultaneously or a single-color analog TV signal with associated audio.
(a) Under 960 one way voice circuits
(b) Over 960 one-way voice circuits
(c) Over 960 two way voice circuits
(d) None of these
Q238. DBS services stands as________.
(a) Direct broadcast satellite
(b) Distance broadcast satellite
(c) Distributed broadcast satellite
(d) None of these
Q239. Broadcast services include______________.
(a) Audio services
(b) Television services
(c) Internet services
(d) All of these
Q240. Direct broadcast television ________.
(a) Digital TV
(b) Double TV
(c) Analog TV
(d) None of these
Q241. The orbital spacing is ______ for the high-power satellites, so adjacent satellite interference is
considered nonexistent.
(a) 18°
(b) 9°
(c) 27°
(d) None of these
Q242. A satellite may carry ______ transponders.
(a) 32
(b) 41
(c) 24
(d) None of these
Q243. If all 32 transponders are in use, each will operate at the lower power rating of__________.
(a) 12 W
(b) 120 W
(c) 1200 W
(d) None of these
Q244. By doubling up the high-power amplifiers, the number of transponders is_________.
(a) Increased by half to 48
(b) Reduced by half to 16
(c) same
(d) None of these
Q245. By doubling up the high-power amplifiers, the number of transponders is reduced by half to 16, but
each transponder operates at____________.
(a) The higher power rating of 120 W
(b) The higher power rating of 240 W
(c) Same
(d) None of these
Q246. The frequencies for direct broadcast satellites vary from region to region throughout the world,
although these are generally in the_____________.
(a) Ku band
(b) Ka band
(c) C-band
(d) None of these
Q247. The primary use of which is for DBS, the uplink frequency range is_________, and the downlink
range is 12.2 to 12.7 GHz.
(a) 17.3 to 17.8 GHz
(b) 17.3 to 19.8 GHz
(c) 15.3 to 17.8 GHz
(d) None of these
Q248. The primary use of these satellites, however, is for point-to-point applications, with an allowed
additional use in the__________.
(a) DBS service
(b) Communication service
(c) Satellite
(d) None of these
Q249. The total of 32 transponders requires the use of both right-hand circular polarization (RHCP) and
left-hand circular polarization (LHCP) in order to permit_______, and guard bands are inserted between
channels of a given polarization.
(a) Frequency reuse
(b) Channel
(c) Transmit informa on
(d) None of these
Q250. The 24-MHz bandwidth of a transponder is capable of carrying__________.
(a) One analog television channel
(b) Two analog television channel
(c) Four analog television channel
(d) None of these
Q251. DTH stands as________.
(a) Direct-to-home (DTH)
(b) Distance-to-home (DTH)
(c) Double-to-home (DTH)
(d) None of these
Q252. The bit rate for digital television depends very much on the___________.
(a) Picture format
(b) Information format
(c) Voice format
(d) None of these
Q253. Using the HDTV format having a pixel count per frame of _____and a refresh rate of 30 frames
per second
(a) 192 * 108
(b) 1920 * 1080
(c) 920 * 1000
(d) None of these
Q254. In the broadcast raster for studio-quality television, when digitized according to the international
CCIR-601 television standard, requires a bit rate of___________.
(a) 216 Mb/s
(b) 26 Mb/s
(c) 2006 Mb/s
(d) None of these
Q255. Single DBS transponder has to carry somewhere between ___________TV programs to be
commercially viable.
(a) Four and eight
(b) Two and eight
(c) Six and eight
(d) None of these
Q256. MPEG stands as______.
(a) Moving Pictures Expert Group
(b) Most Pictures Expert Group
(c) Moving Pictures Enhance Group
(d) None of these
Q257. In DBS systems.
(a) MPEG-2 is used for video compression
(b) MPEG-2 is used for video enhancing
(c) MPEG-2 is used for audio compression
(d) None of these
Q258. As a first or preprocessing step, the analog outputs from the red (R), green (G), and blue (B) color
cameras are converted to________.
(a) A luminance component (Y) and two chrominance components (Cr) and (Cb)
(b) Two luminance component (Y) and (Cb) and one chrominance components (Cr)
(c) Two luminance component (Y), (Cb) and (Cr)
(d) None of these
Q259. MPEG-2 uses:
(a) 4:2:0 sampling
(b) ) 2:0:0 sampling
(c) ) 3:2:0 sampling
(d) None of these
Q260. 4:4:4 sampling means that_______.
(a) The sampling rates of Y, Cb, and Cr are equal
(b) The sampling rates of Y, Cb, and Cr are unequal
(c) a&b
(d) None of these
Q261. 4:2:2 sampling means that ________.
(a) The Cb and Cr signals are sampled at half the rate of the Y signal component.
(b) The Cb and Cr signals are sampled at double the rate of the Y signal component.
(c) a&b
(d) None of these
Q262. 4:2:0 sampling means that______.
(a) Cb and Cr are sampled at half the Y sampling rate, but they are sampled only on alternate scan
lines.
(b) Cb and Cr are sampled at double the Y sampling rate, but they are sampled only on alternate scan
lines.
(c) Cb and Cr are sampled at full the Y sampling rate, but they are sampled only on alternate scan lines.
(d) None of these
Q263. A macro-block consists of ________.
(a) 16 * 16 pixels
(b) 8 * 8 pixels
(c) 2 * 2 pixels
(d) None of these
Q264. In DBS system.
(a) MPEG-1 is used for video compression
(b) MPEG-1 is used for audio compression
(c) MPEG-1 is used for picture compression
(d) None of these
Q265. MPEG-4 is________.
(a) MPEG-4 provides many features not present with other compression schemes, such as interactivity for
viewers, where objects within a scene can be manipulated.
(b) MPEG-4 provides the major advantage is the reduction in bit rate offered in satellite television.
(c) a&b
(d) None of these
Q266. MPEG-4 provides the major advantage is the ________in bit rate offered in satellite television.
(a) Reduction
(b)Increment
(c) double
(d) None of these
Q267. ODU stands as_____.
(a) The Home Receiver Outdoor Unit
(b) The Home Receiver outside Unit
(c) The Home Receiver opposite Unit
(d) None of these
Q268. IDU stands as______.
(a) The Home Receiver input Unit
(b) The Home Receiver Indoor Unit
(c) The Home Receiver induce Unit
(d) None of these
Q269. Because of the highly compressed nature of the DBS signal, there is little ___________in the
information being transmitted, and bit errors affect the signal much more severely than they would in a
noncom-pressed bit stream.
(a) Redundancy
(b) Disturbance
(c) Noise
(d) None of these
Q270. In Because of the highly compressed nature of the DBS signal, there is little redundancy in the
information being transmitted, and bit errors affect the signal much ____severely than they would in a
non-compressed bit stream.
(a) More
(b) Less
(c) Same
(d) None of these
Q271. The use of turbo codes, and LDPC codes currently being introduced for high definition TV will
provide a much greater________ in transponder capacity.
(a) Increase
(b) Decrease
(c) Same
(d) None of these
Q272. The IDU must be able to receive any of the 32 transponders, although only _____ of these will be
available for a single polarization.
(a) 16
(b) 8
(c) 24
(d) None of these
Q273. The main factor governing performance of a DBS system will be the [Eb/N0] of the______.
(a) Uplink
(b) Downlink
(c) Up-downlink
(d) None of these
Q274. HDTV stands as________.
(a) High Definition Television
(b) Half Definition Television
(c) Huge Definition Television
(d) None of these
Q275. DirecTV plans to use _________in its HDTV satellite broadcasts and all HDTV services in Europe
are expected to use this rather than the MPEG-2.
(a) H.264/AVC
(b) H.24/AVC
(c) H.64/AVC
(d) None of these
Q276. CRT stands as_________.
(a) Combine ray tube
(b) Cathode ray tube
(c) Cathode rise tube
(d) None of these
Q277. The familiar direct view cathode ray tube (CRT) used for analog TV is _____of displaying HDTV.
(a) Not capable
(b) Capable
(c) Accept
(d) None of these
Q278. Types of display:
(a) Plasma displays
(b) Liquid crystal displays (LCD)
(c) Digital light processing (DLP) displays
(d) all of these
Q279. Plasma displays are made up of tiny______________. The video signal stimulates a gas inside the
cells, which impacts the phosphors causing them to glow.
(a) Cells coated with red, green, and black phosphors
(b) Cells coated with red, green, and blue phosphors
(c) Cells coated with white, green, and blue phosphors
(d) None of these
Q280. DLP displays utilize a digital micro-mirror device (DMD) invented by_______.
(a) Texas Instruments
(b) IBM
(c) STMicroelectronics
(d) None of these
Q281. The DMD contains approximately_________, each micro-mirror representing one pixel. The
micro-mirrors can be mechanically pivoted up to 5000 times a second, the pivoting being activated by the
video signal.
(a) 5.1 million micro-mirrors
(b) 10.3 million micro-mirrors
(c) 1.3 million micro-mirrors
(d) None of these
Q282. For NTSC analog TV, (see Sec. 9.5) Lact=483, L=525,a= 4/3, F lfb = 1.19 and F =30. With K =0.7.
Calculate the highest video frequency.
(a) 2.2 MHz
(b) 4.2 MHz
(c) 3.2 MHz
(d) None of these
Q283. Calculate the highest video frequency for HDTV 1080i. Assume a Kell factor of 0.7.
(a) 2.6 MHz
(b) 206 MHz
(c) 26 MHz
(d) None of these
Q284. VSAT stands as______.
(a) Very small aperture terminal system
(b) Vast small aperture terminal system
(c) Virtual small aperture terminal system
(d) None of these
Q285. The basic structure of a VSAT network consists of a hub station which provides a broadcast
facility to all the VSATs in the network and the VSATs themselves which access the satellite in some
form of___________.
(a) Multiple-access mode
(b) Multiplexing
(c) Channel
(d) None of these
Q286. ____________is the normal downlink mode of transmission from hub to the VSATs, and the
transmission can be broadcast for reception by all the VSATs in a network, or address coding can be used
to direct messages to selected VSATs.
(a) Space division multiplex
(b) Frequency division multiplex
(c) Time division multiplex
(d) None of these
Q287. The most popular access method is________, which allows the use of comparatively low-power
VSAT terminals
(a) FDMA
(b) TDMA
(c) CDMA
(d) None of these
Q288. DAMA can be used with______________.
.
(a) FDMA
(b) TDMA
(c) FDMA as well as TDMA
(d) None of these
Q289. DAMA can be used with FDMA as well as TDMA, but the disadvantage of the method is that a
______________through which the VSATs can make requests for channel allocation.
(a) Reserve channel must be instituted
(b) Un-reserve channel must be instituted
(c) Channel allocation
(d) None of these
Q290. Most VSAT systems operate in the ________, although there are some C-band systems in
existence.
(a) Ka band
(b) Ku band
(c) L- band
(d) None of these
Q291. Radarsat is ________________, which is part of the Canadian space program.
(a) An earth-resources remote-sensing satellite
(b) An satellite-resources remote-sensing s
(c) An radar satellite
(d) None of these
Q292. In the GPS system, a constellation of 24 satellites circles the earth in near-circular________.
(a) GEO
(b) MEO
(c) Inclined orbits
(d) None of these
Q293. The GPS system uses_____________, from satellites to users, so that the user does not require a
transmitter, only a GPS receiver.
(a) One-way transmissions
(b) Two-way transmissions
(c) Half-way transmissions
(d) None of these
Q294. The GPS system uses one-way transmissions, from satellites to users, so that the user_________.
(a) Does not require a transmitter
(b) Does require a transmitter
(c) Require only a GPS receiver
(d) a & c
Q295. The Orbital Communications Corporation (Orbcomm) system is a___________, which provides
two-way message and data communications services and position determination.
(a) MEO satellite system
(b) GEO satellite system
(c) LEO satellite system
(d) None of these
Q296. The Orbital Communications Corporation (Orbcomm) system is a LEO satellite system, which
provides __________message and data communications services and position determination.
(a) Two-way
(b) One-way
(c) Half-way
(d) None of these
Q297. The Asian Cellular System, or AceS, utilizes one _________covering the Asia Pacific area, an area
of over 11 million square miles.
(a) Garuda MEO satellite
(b) Garuda geosynchronous satellite
(c) Garuda LEO satellite
(d) None of these
Q298. Inden fies the diagram:
(a) MPEG-1
(b) MPEG-2
(c) MPEG-4
(d) None of these
Q299. Inden fies the diagram:
(a) Block schematic for the Indoor unit (IDU)
(b) Block schematic for the outdoor unit (ODU)
(c) Block schematic for the In-outdoor unit (ODU)
(d) None of these
Q300. Inden fies the diagram:
(a) A polar view of the Iridium satellite orbits
(b) A polar view of the Orbsat satellite orbits
(c) A polar view of the radarsat satellite orbits
(d) None of these
Q301. Inden fies the diagram:
(a) MPEG-1 encoder paths.
(b) MPEG-2 encoder paths.
(c) MPEG-4 encoder paths.
(d) None of these
Q102. The uplink Frequency of C-band?
(a) 4GHz (b) 6GHz
(c) 8GHz (d) none of these
