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Broadband Internet Access
Power
Power-Line Internet
This is a new service still in its infancy that may eventually permit
broadband Internet data to travel down standard high-voltage power
lines. However, the system has a number of complex issues, the primary one
being that power lines are inherently a very noisy environment. Every time a
device turns on or off, it introduces a pop or click into the line.
Energy-saving devices often introduce noisy harmonics
into the line. The system must be designed to deal with these natural signaling
disruptions and work around them.
The second major issue is signal strength and operating frequency.
The system is expected to use frequencies in the 10 to 30 MHz
range, which has been used for decades by ham radio
operators, as well as international shortwave
broadcasters and a variety of communications systems (military, aeronautical,
etc.). Power lines are unshielded and will act as transmitters for the signals
they carry, and have the potential to completely wipe out the usefulness of the
10 to 30 MHz range for shortwave
communications purposes.
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