Cobra Electronics 29 LX LE - Manual (Page 7)

Ignition Noise Interference
Use.of.a.mobile.receiver.at.low.signal.levels.is.
normally.limited.by.the.presence.of.electrical.
noise..The.primary.source.of.noise.in.automo-
biles.is.from.the.alternator.and.ignition.system..
Typically,.when.signal.level.is.adequate,.the.back-
ground.noise.does.not.present.a.serious.problem..
Also,.when.extremely.low.level.signals.are.being.
received,.the.transceiver.may.be.operated.with.
the.vehicle’s.engine.turned.off..The.unit.requires.
very.little.current.and.therefore.will.not.signifi-
cantly.discharge.the.vehicle’s.battery.
Even.though.the.Cobra.29.LX.LE.has.an.auto-
matic.noise.limiter,.in.some.installations.ignition.
interference.may.be.high.enough.to.make.good.
communications.impossible..Many.possibilities.
exist.and.variations.between.vehicles.require..
different.solutions..Consult.your.Cobra.dealer.or.
a.2-way.radio.technician.for.help.in.locating.the.
source.of.a.severe.noise.
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