You can also store stations manually on the AS storage locations (see 'Storing a Radio Station into a Preset' elsewhere in this handbook).
Recalling Stored Stations
Select waveband AM or FM with the button AM/FM 9.
Press the desired preset button.
To select one of the stations stored with
Radio Reception
Due to varying reception locations, car radios have performance limitations that may on occasions create the impression that your radio is malfunctioning. To assist you in understanding what can be expected from your radio, we have set out below how reception may vary from time to time and under certain conditions.
AM and FM:
There are two types of radio broadcasts in Australia. AM or Amplitude Modulation in which the amplitude of the signal is varied to produce the sound and FM or Frequency Modulation in which the frequency is varied to produce the sound.
Range:
AM broadcasts tend to follow the earth's curvature and also reflect from the upper atmosphere, in which enables long range reception, especially after sunset.
FM transmissions are basically
Interference:
Interference is caused by either natural or man made electrical disturbances. This can affect the amplitude of the signal being received. AM signals are more prone to this type of interference than FM signals. This type of interference has little or no effect on the frequency of the received signal, thus AM is susceptible to interference from power lines, fluorescent lighting, neon signs, traffic light control circuits, overhead tram wires and electrical storms. With FM reception, these amplitude variations are filtered out, leaving a relatively clear signal (refer to 'Peculiarities of FM Mobile Reception), making this one of the major advantages of FM broadcasts.
Peculiarities of FM Mobile
Reception:
A mobile FM radio cannot be expected to continously provide the quality of FM reception you may have experienced on your home radio. Contrary to popular opinion, FM broadcasts are not static free, and although your new radio has a
especially in areas without a direct line of sight to the transmitter.
Your radio is also equipped with a soft mute function. The purpose of this is to attenuate the treble and audio level in weak signal areas to reduce the very annoying background hiss, which is customary to weaker FM reception. There are two pheno- mena peculiar to FM reception.
•Flutter - As FM signals reflect off solid objects, it is possible to pass through areas of 'SHADOW' caused by tall buildings and/or hilly terrain, which effectively blocks out the signal. As the car passes in and out of shadow areas, the level of signal will vary at a rapid rate, creating a flutter type of interference to the signal.
•Distortion (Multipath) - Distortion may occur when the direct signal from the transmitter and a reflected signal reach the antenna at the same time and either cancel or aid each other, like ghosting on a TV. This results in intermittent distortion of the signal whilst moving or constant distortion when stationary, such as at a traffic light or when parked. Should this distortion occur while stationary, moving the car approximately 1 or 2 metres would on most occasions correct the problem. Circuitry has also been included in this radio to reduce this type of distortion.
7
