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| 60- compatible with alt. house current |
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| advanced systems committee |
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| advanced TV systems committee |
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| interlaced and progressive |
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| ASTC frames per second; fields |
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| digital light processing; mirrors |
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| microwave relay antennas ; miles apart; curves in dish |
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| 30 miles apart; parabolic curves in dish |
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| 2 wires wrapped around each other |
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| 2 connectors contains radiation of signal |
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| plastic, light pulses, "digital impressions" |
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| science waves require a ____ and _______ |
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| physical medium and propogate mechanically (as opposed to radio which propogates electromagnetically) |
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| # of vibrations a wave cycle completes in one second |
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| loudness of a vibration and how much energy a wave contains |
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| cuases echo; rate sound travels; strongly affected by medium |
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| electromagnetically and need no physical matter |
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| characteristics of electromagnetic radio waves |
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| 1) radiate outward from source; 2) travel @ same velocity; 3) wave props. |
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| electromagnetic disturbance @ certain frequency- transmitters |
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| imposistion audio signal on a carrier wave |
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| "meaningful vibrations" that resemble orignal |
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| __ more susceptible to static b/c low amp = _____ |
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| AM; more room for ENG interferance |
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| liscence from c.o.c. req'd |
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| national television systems comittee- established technical parameters for TV |
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| 2 interlaced frames per second |
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| w interlaced always something on screen; but progressive nothing on screen (no signal) |
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| satellite frequency bands - mobile services |
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| sattelite freq. bands, fixed |
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| satellite freq. bands -military |
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| speed of sound , speed of light |
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| 1,130 ft per second; 186,000 miles per second |
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| chamber of commerce; but never said no to anyone |
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| fed radio commission; impose tech scheme |
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| FCC formed, expanded duties |
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| way audience recieves info |
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| early tech - transistional tech 70's, remote etc- current techn "on demand" |
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| AUDIENCES from ___ to _____ |
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| large, heterogeneous, anonymoys |
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| homogeneous (can target certain audiences), known and unknown, cumulatively large and also individual |
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| takes in all info in recording; sampling and quantization -takes in only select info in bars |
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| sampling and quantization |
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| sample rate (quantization for digital) |
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| (16 bits) x (44.1 khz) = 256 |
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| theories of electromagnetic energy |
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proved maxwell's theory (send and recieve waves)
*the truth hertz |
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| "radio teleography" dots and dashes |
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"father of radio" audion tube
-acutally made technology useable |
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telephony; 1st wireless transmission
*wireleSS tranSmiSSion |
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| 1st radio station (KDKA Pittsburg) |
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| 1st radio station because |
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| radio waves, uncoded signa, continuious progamming, for general public, liscenced by chamber of commerce |
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american marconi, rca, presented TV
*radio during titanic sinking -sarnoff signoff byeee |
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| FM radio, climbed own towers (strong ARMS) |
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| from many small to one large owner, allowed by changes in regulations |
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| multiple products ex: newspaper w media |
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| company has control over all aspects of product (publicity, creation, distribution etc) |
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| night, ionosphere more reflective |
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