InteriorComfort
AudioSystem
SignalsfromanFMtransmitteraresimilar
tobeamsoflightbecausetheydonot
bendaroundcorners,buttheydoreflect.
UnlikeAMsignals,FMsignalscannot
travelbeyondthehorizon.Therefore,FM
stationscannotbereceivedatthegreat
distancespossiblewithAMreception.
Flutter/Skipnoise
SignalsfromanFMtransmittermovein
straightlinesandbecomeweakinvalleys
betweentallbuildings,mountains,and
otherobstacles.Whenavehiclepasses
throughsuchanarea,thereception
conditionsmaychangesuddenly,resulting
inannoyingnoise.
Ionosphere
FM wave
AM wave
FM wave
100—200
km (60—120 miles)
Atmosphericconditionscanalsoaffect
FMreception.Highhumiditywillcause
poorreception.However,cloudydays
mayprovidebetterreceptionthanclear
days.
Weaksignalnoise
Insuburbanareas,broadcastsignals
becomeweakbecauseofdistancefrom
thetransmitter.Receptioninsuchfringe
areasischaracterizedbysoundbreakup.
Multipathnoise
SinceFMsignalscanbereflectedby
obstructions,itispossibletoreceiveboth
thedirectsignalandthereflectedsignalat
thesametime.Thiscausesaslightdelay
inreceptionandmaybeheardasabroken
soundoradistortion.Thisproblemmay
alsobeencounteredwheninclose
proximitytothetransmitter.
Reflected wave
Direct
6-18
| Categories | Mazda 3 Manuals |
|---|---|
| Model Year | 2009 |
| Download File |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
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