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Broadcasting in the Public Interest
MidTerm
87
Communication
Undergraduate 2
11/01/2010

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Cards

Term
television 1945
Definition
16 channels freeze wwII
Term
tv 1946
Definition
100+ channels
Term
NTSC
Definition
technical parameters
Term
aspect ratio NTSC
Definition
4:3
Term
NTSC resolution
Definition
525 lines/483 displayed
Term
ntsc frames
Definition
30 frames per second
Term
ntsc scanning
Definition
interlaced
Term
ntsc field
Definition
60- compatible with alt. house current
Term
NTSC bandwidth
Definition
6 MHZ
Term
channels on VHF
Definition
2-13
Term
channels on UHF
Definition
14-69
Term
ATSC
Definition
advanced systems committee
Term
advanced TV systems committee
Definition
DTV
Term
ATSC res
Definition
1080i, 720
Term
ATSC
Definition
interlaced and progressive
Term
ATSC aspect ratio
Definition
16:9
Term
ASTC frames per second; fields
Definition
30, 60
Term
ATSC best
Definition
interlaced 1080i is BEST
Term
CRT - old tv
Definition
cathode ray tube
Term
LCD (longer, better)
Definition
liquid crystal display
Term
PDP
Definition
plasma display panel
Term
DLP
Definition
digital light processing; mirrors
Term
sirius satellite orbit
Definition
high elliptical orbit
Term
microwave relay antennas ; miles apart; curves in dish
Definition
30 miles apart; parabolic curves in dish
Term
twisted pair cable
Definition
2 wires wrapped around each other
Term
coaxial cable
Definition
2 connectors contains radiation of signal
Term
fiberoptic
Definition
plastic, light pulses, "digital impressions"
Term
science waves require a ____ and _______
Definition
physical medium and propogate mechanically (as opposed to radio which propogates electromagnetically)
Term
frequency
Definition
# of vibrations a wave cycle completes in one second
Term
frequency measured in
Definition
hertz
Term
people can hear range of
Definition
20-20000 hertz
Term
amplitude
Definition
loudness of a vibration and how much energy a wave contains
Term
amplitude measured in
Definition
decibles
Term
sound speed
Definition
cuases echo; rate sound travels; strongly affected by medium
Term
transmitters vibrate at
Definition
broadcasted frequency
Term
radio waves propogate___
Definition
electromagnetically and need no physical matter
Term
characteristics of electromagnetic radio waves
Definition
1) radiate outward from source; 2) travel @ same velocity; 3) wave props.
Term
modulation
Definition
electromagnetic disturbance @ certain frequency- transmitters
Term
modulation
Definition
imposistion audio signal on a carrier wave
Term
modulation
Definition
"meaningful vibrations" that resemble orignal
Term
__ more susceptible to static b/c low amp = _____
Definition
AM; more room for ENG interferance
Term
wireless ship act
Definition
all boats have radio
Term
radio act of 1912
Definition
liscence from c.o.c. req'd
Term
ntsc
Definition
national television systems comittee- established technical parameters for TV
Term
field 60
Definition
2 interlaced frames per second
Term
cliff effect
Definition
w interlaced always something on screen; but progressive nothing on screen (no signal)
Term
satellite frequency bands - mobile services
Definition
L, S
Term
sattelite freq. bands, fixed
Definition
C
Term
satellite freq. bands -military
Definition
X
Term
sat. freq. bands.
Definition
KU, KA, V
Term
speed of sound , speed of light
Definition
1,130 ft per second; 186,000 miles per second
Term
c. o. c.
Definition
chamber of commerce; but never said no to anyone
Term
radio act of 1927
Definition
fed radio commission; impose tech scheme
Term
radio act of 1934
Definition
FCC formed, expanded duties
Term
democratization
Definition
way audience recieves info
Term
appointment television
Definition
early tech - transistional tech 70's, remote etc- current techn "on demand"
Term
AUDIENCES from ___ to _____
Definition
mass to interactive
Term
mass
Definition
large, heterogeneous, anonymoys
Term
interacitve audiences
Definition
homogeneous (can target certain audiences), known and unknown, cumulatively large and also individual
Term
analog vs digital
Definition
takes in all info in recording; sampling and quantization -takes in only select info in bars
Term
digital
Definition
sampling and quantization
Term
sample rate (quantization for digital)
Definition
44.1 KHz rate
Term
16 bits
Definition
256/sample
Term
(16 bits) x (44.1 khz) = 256
Definition
samples
Term
maxwell
Definition
theories of electromagnetic energy
Term
hertz
Definition
proved maxwell's theory (send and recieve waves)
*the truth hertz
Term
marconi
Definition
"radio teleography" dots and dashes
Term
De Forest
Definition
"father of radio" audion tube
-acutally made technology useable
Term
feSSendin
Definition
telephony; 1st wireless transmission
*wireleSS tranSmiSSion
Term
Konrad
Definition
1st radio station (KDKA Pittsburg)
Term
1st radio station because
Definition
radio waves, uncoded signa, continuious progamming, for general public, liscenced by chamber of commerce
Term
Sarnoff
Definition
american marconi, rca, presented TV
*radio during titanic sinking -sarnoff signoff byeee
Term
armstrong
Definition
FM radio, climbed own towers (strong ARMS)
Term
consolidation
Definition
from many small to one large owner, allowed by changes in regulations
Term
diversification
Definition
multiple products ex: newspaper w media
Term
vertical integration
Definition
company has control over all aspects of product (publicity, creation, distribution etc)
Term
AM KHZ
Definition
535 to 1705
Term
AM channels
Definition
10 KHz
Term
# AM stations
Definition
117
Term
AM waves
Definition
ground, sky
Term
max watts AM
Definition
50,000 watts
Term
am works better at
Definition
night, ionosphere more reflective
Term
FM - between __ on band
Definition
88-108 MHz
Term
# FM Channels
Definition
2 MHz (200 KHz)
Term
# FM channels
Definition
100 channels
Term
FM waves
Definition
direct waves ONLY
Term
FM max wattage
Definition
100,000 watts
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