state of am, fm and tv bandsstate of am, fm and tv bands yam ‐freeze on new apps yam ‐minor...
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State of AM, FM and TV Bands,AM ‐ Freeze on New AppsAM ‐Minor Changes are allowedgFM ‐ NCE, LPFM and New Commercial FreezeFM ‐ Translator Freeze – Minor ChangesTV Band to be repacked Minor changes onlyTV ‐ Band to be repacked – Minor changes only
FCC Incentive Auction NPRMO l l h i f UHF Our central goals are to repurpose the maximum amount of UHF spectrum for flexible licensed and unlicensed use, while at the same time preserving a healthy, diverse broadcasting service.
AM Radio and environmental noiseDimmer SwitchesOverhead power linesFlorescent Lights BallastsFlorescent Lights ‐ BallastsLED lights ‐ switching power suppliesComputers ‐ big and smallTelevisions, particularly with Plasma ScreensMotorsSwitchesSwitchesCar ignitionsLightningl lElectronic Filters
IBOC
P l t ‘fi ’ AM ’tProposals to ‘fix’ AM – won’tAll digital modulation – reinventing AMAll digital modulation – reinventing AMModify AM antenna efficiency standards – (downward)Wider use modulation dependent carriers (saves elec )Wider use ‐modulation dependent carriers (saves elec.)Reduce day/night community coverage standardsEliminate the “Ratchet” rule which reduces interference Eliminate the Ratchet rule – which reduces interference contributions for minor changesOpen window for FM translators for AM stationsOpen window for FM translators for AM stations
FM Radio – Sources of InterferenceFM Radio Sources of InterferenceFM radio not impacted as much as AM by noise (Thank
)you Mr. Armstrong.)All side‐mounted omni antennas are directionalWeaknesses in FCC methodology 3‐16 km terrain radials IBOC – short spaced stationspLPFM – reduces FM coverage past protected 60 dBuEnvironmental noise – Computer routersEnvironmental noise Computer routers
TV I t fTV InterferenceEnvironmental Noise – DTV pixilation – black screenEnvironmental Noise DTV pixilation black screenLow Band channels (2‐13) weaknessRepacking Telco Interference Repacking, Telco Interference No protection proposed for LPTVLongley‐Rice – OET‐69 ‐ kwx points are thrown out Longley‐Rice – OET‐69 ‐ kwx points are thrown out Co‐channel – unusual prpagationNoisy kidsNoisy kids