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GM47/GM48 INTEGRATOR’S MANUAL
74
LZT 123 7263 R1C
4.3.5 Possible Communication Disturbances
Possible communication disturbances include the following:
• Noise can be caused by electronic devices and radio transmitters.
• Path-loss occurs as the strength of the received signal steadily
decreases in proportion to the distance from the transmitter.
• Shadowing is a form of environmental attenuation of radio signals
caused by hills, buildings, trees or even vehicles. This can be a
particular problem inside buildings, especially if the walls are thick
and reinforced.
• Multi-path fading is a sudden decrease or increase in the signal
strength. This is the result of interference caused when direct and
reflected signals reach the antenna simultaneously. Surfaces such as
buildings, streets, vehicles, etc., can reflect signals.
• Hand-over occurs as you move from one cell to another in the GSM
network. Your mobile application call is transferred from one cell to
the next. Hand-over can briefly interfere with communication and
may cause a delay, or at worst, a disruption.