Ford 1999 Taurus Manuel d'utilisateur télécharger pdf (Page 71)

Antenna

The antenna for the audio system is integral to the

rear window glass. The AM portion of the antenna

uses the same pattern of lines as the grid for the

rear defroster. The FM portion of the antenna uses

the top three lines on the glass, which are indicated

by the word “RADIO.”

Common Radio Reception

Conditions

Several conditions prevent FM reception from being

completely clear and noise-free, such as the

following:

Distance/Strength

The strength of the FM signal is directly related to

the distance the signal must travel. The listenable

range of an average FM signal is approximately 24

miles (40 km). Beyond this distance, the radio is

operating in a “fringe” area and the signal becomes

weaker. Also, “Signal Modulation” is used by some

stations to increase their “loudness” relative to other

stations. The difference in loudness can be a result

of signal modulation as well as signal strength.

Terrain

The terrain (hilly, mountainous, tall buildings) of the

area over which the signal travels may prevent the

FM signal from being noise-free.

If there is a building or large structure between the

antenna and station, some of the signal “bends”

around the building, but certain spots receive almost

no signal. Moving out of the “shadow” of the

structure will allow the station to return to normal.

When the radio waves are reflected off objects or

structures, the reflected signal cancels the normal

signal, causing the antenna to pick up noise and

distortion. Cancellation effects are most prominent

in metropolitan areas, but also can become quite

severe in hilly terrain and depressed roadways.

File:04fnas8.ex

Update:Wed Jun 19 10:43:44 1996

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Ford 1999 Taurus Manuel d'utilisateur Page 71