wrote:
> On Mon, 17 Jan 2005 20:32:35 +1300, Axle wrote:
>
>
>>>So why didn't they simply change frequency/channel?
>>
>>Interference from other sources is ambient infrared, not at the
>>subcarrier frequency.
>
>
> LOL - so if it's too warm, ie too much radiant heat, then an IR remote
> won't work correctly.
Not exactly, but if there is a lot of emission at the wavelength that
the receivers work at, the noise can mask the code.
>
>
>
>>IR receiver diodes respond over quite a wide band around 900 nanometers
>>wavelength
>
>
> So change the frequency on which it responds? Surely that is possible. I
> mean radios can do that, and can isolate desired transmissions from
> undesired interference.
>
> Why cannot IR links do the same?
>
They can do all sorts of things with optics, but not for $2 worth of
components in a TV remote control.