Thread: Beware Dodgy Xmas Lights!
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Old 08-12-2004, 19:54   #9
Theodoric
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Re: Beware Dodgy Xmas Lights!
Ah.

"When the lighting control unit is set to any mode other than a steady state it may generate high levels of radio frequency noise and may cause the broadband service to lose synchronisation."

Will it? The lights are probably going on and off at about 1Hz. So you've got a squarish wave which can be expressed as as a Fourier series, that is a sum of sin and cos terms of higher and higher harmonics. Does it actually extend to rf frequencies? I suppose it's possible. Fridges switching on and off used to be blamed for interference. I await a reasoned response from an electrical engineer.
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