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Remote control issues with Humax Freesat |
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#51 |
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Inactive Member
Join Date: Dec 2008
Posts: 2,324
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I wonder if Bob_ (what's the rest of his name?) will have any comment.
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#52 |
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Forum Member
Join Date: Jan 2009
Posts: 21
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Update
Nearly a year to discover this but better late than never. I have found that a lamp positioned almost directly over the remote sensor was affecting the reception. Turn the lamp on and the remote is useless, turn it off and works fine. The bulb is a new style low energy one don't know if that made the difference. Moved the lamp now all problems solved
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#53 |
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Forum Member
Join Date: May 2005
Location: Redditch Worcs
Posts: 17,289
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Quote:
Nearly a year to discover this but better late than never. I have found that a lamp positioned almost directly over the remote sensor was affecting the reception. Turn the lamp on and the remote is useless, turn it off and works fine. The bulb is a new style low energy one don't know if that made the difference. Moved the lamp now all problems solved
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#54 |
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Forum Member
Join Date: Apr 2008
Posts: 1,622
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AFAIK energy saving lamps (compact fluorescent light bulbs) produce mainly UV (UV-B and UV-C) radiation and very little IR - certainly in comparison to a conventional incandescent light bulb which produces huge amounts of IR hence the heat.
IR operates in the wavelength range 1 mm down to 750 nm whereas UV operates from 400 nm down to 10 nm. Visible light lies between 750 nm and 400 nm. A frequency of 940 nm for an IR remote control LED is typical -well into the IR range and way out of the UV range. The interference of the remote control may well have to do with other frequencies emitted by the lamp. |
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#55 |
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Forum Member
Join Date: May 2005
Location: Redditch Worcs
Posts: 17,289
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Quote:
AFAIK energy saving lamps (compact fluorescent light bulbs) produce mainly UV (UV-B and UV-C) radiation and very little IR - certainly in comparison to a conventional incandescent light bulb which produces huge amounts of IR hence the heat.
IR operates in the wavelength range 1 mm down to 750 nm whereas UV operates from 400 nm down to 10 nm. Visible light lies between 750 nm and 400 nm. A frequency of 940 nm for an IR remote control LED is typical -well into the IR range and way out of the UV range. The interference of the remote control may well have to do with other frequencies emitted by the lamp. http://physics.gac.edu/~dchenry/pape...0for%20Web.pdf |
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#56 |
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Forum Member
Join Date: Apr 2008
Posts: 1,622
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High frequency control gear units alter the frequency of the mains current and IR remote controls can misinterpret radiation from the control gear as a signal.
There certainly appears to be more problems caused by certain makes and models of bulbs than others. A change of bulb may do the trick rather than resorting to relocating the lamp itself. The IR signal emitted by a remote control doesn't produce any discernible heat unlike that produced by incandescent light bulbs which is in the thermal range. How's the cat by the way? Just kitten. Nice to have Snoods back again - missed you (he said as he fired a second time). |
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