| |
Q: What is ATTENUATION ?
A:Attenuation is a general term that refers to any reduction in the strength
of a signal. Attenuation occurs with any type of signal, whether digital
or analog. Sometimes called loss, attenuation is a natural consequence
of signal transmission over long distances. The extent of attenuation
is usually expressed in units called decibels (dBs).
In conventional and fiber optic cables, attenuation is specified in terms
of the number of decibels per foot, 1,000 feet, kilometer, or mile. The
less the attenuation per unit distance, the more efficient the cable.
When it is necessary to transmit signals over long distances via cable,
one or more repeaters can be inserted along the length of the cable. The
repeaters boost the signal strength to overcome attenuation. This greatly
increases the maximum attainable range of communication.
|
|
