Toyota Yaris: Operating Tips for Audio System / Radio Reception

Toyota Yaris XP210 (2020-2021) Owner's Manual / Interior Features / Audio System / Operating Tips for Audio System / Radio Reception

AM characteristics

AM signals bend around such things as buildings or mountains and bounce off the ionosphere.

Therefore, they can reach longer distances than FM signals.

Because of this, 2 stations may sometimes be picked up on the same frequency at the same time.

Toyota Yaris. Radio Reception

  1. Ionosphere
  2. Station 1
  3. Station 2

FM characteristics

An FM broadcast range is usually about 25 - 30 miles (40 - 50 km) from the source. Because of extra coding needed to break the sound into 2 channels, stereo FM has even less range than monaural (non-stereo) FM.

Toyota Yaris. Radio Reception

  1. FM Station
  2. 25 - 30 miles (40 - 50 km)

Signals from an FM transmitter are similar to beams of light because they do not bend around corners, but they do reflect. Unlike AM signals, FM signals cannot travel beyond the horizon. Therefore, FM stations cannot be received at the great distances possible with AM reception.

Toyota Yaris. Radio Reception

  1. Ionosphere
  2. FM wave
  3. AM wave
  4. 60 - 120 miles (100 - 200 km)
  5. Obstruction

Atmospheric conditions can also affect FM reception. High humidity will cause poor reception. However, cloudy days may provide better reception than clear days.

  • Multipath noise

    Since FM signals can be reflected by obstructions, it is possible to receive both the direct signal and the reflected signal at the same time. This causes a slight delay in reception and may be heard as a broken sound or a distortion. This problem may also be encountered when in close proximity to the transmitter.

    Toyota Yaris. Radio Reception

    1. Direct
    2. Reflected wave
  • Flutter/Skip noise

    Toyota Yaris. Radio Reception

    Signals from an FM transmitter move in straight lines and become weak in valleys between tall buildings, mountains, and other obstacles. When a vehicle passes through such an area, the reception conditions may change suddenly, resulting in annoying noise.

  • Weak signal noise

    Toyota Yaris. Radio Reception

    In suburban areas, broadcast signals become weak because of distance from the transmitter. Reception in such fringe areas is characterized by sound breakup.

  •  Strong signal noise

    Toyota Yaris. Radio Reception

    This occurs very close to a transmitter tower. The broad- cast signals are extremely strong, so the result is noise and sound breakup at the radio receiver.

  • Station drift noise

    When a vehicle reaches the area of 2 strong stations broadcasting at similar frequencies, the original station may be temporarily lost and the second station picked up. At this time there will be some noise from this disturbance.

    Toyota Yaris. Radio Reception

    1. Station 1 88.1 MHz
    2. Station 2 88.3 MHz

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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