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Posted by Harald on December 06, 2001 at 06:39:46:
Power companies often uses signals in the frequency range of 1000 Hertz in order to switch counters on and off and in the range between 50 kHz and 500 kHz (well known as PLC) for data transmission (sometimes but rarely even for telephony).
How can I identify such signals which are transmitted by power companies through their lines? Does there something like callsigns exist?
Are there tables for identifying such signals?
Which frequencies are in use?
Can signals (especially in the 1000 Hertz range) travel between asynchronous networks through HVDC links?
How far away from power lines can such signals be detected?
(I received signals in the longwave range where they often interfere LW - broadcasting reception at wet wheather until a distance of 1 km away from the powerline, but there are reports of receiving such signals in a distance of 30 kilometres from the powerline about which it is transmitted.)
How far away from powerlines can signals in the 1000 Hertz range be received?
Can I receive signals from powerlines in the 1000 Hertz range from power companies which have no line connection to the power grid which supplies my home?
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