Attenuation is the decrease in
signal amplitude. If we have a small signal, it becomes increasingly
harder to decipher the signal. Much like a yell is easier to understand
that a faint whisper, computers appreciate healthy signal amplitudes.
Signal Attenuation
You’ll notice in the above diagram that as distance increases,
amplitude decreases. This becomes a problem since computers communicate
in this instance via two values; high values and low values. Since the
high value becomes increasingly similar to a low value, the signal will
eventually become worthless for communication. Several factors create attenuation- mostly resistance in the copper
wire and leaked signal energy. So to fix the problem, we try to stick
with the recommended cable lengths. If you indeed need a longer cable
run, you may clean the signal by adding a repeater, switch, router, or
other devices to your network so that the signal can be regenerated. It’s also important to note that as frequency (the number of cycles a second) increases, so does the noise and interference.
No comments:
Post a Comment