>>>>> "Russell" == Russell Coker <[EMAIL PROTECTED]> writes:
Russell> emit many frequencies. The PCI bus has it's own frequency, Russell> the DRAM has it's own frequency, and whatever is done to Russell> convert 16V DC to 110V (*) for the back-light of the screen Russell> also probably causes some emissions too. I was thinking about this and it occurs to me that such systems have at least (marginally) passed FCC unintentional radiator specs which puts power levels @ ~ -30dBm over all frequencies of interest, which for a part clocked at 1-2GHz is about 5 - 10GHz (usually 5x highest clock frequency). A wireless card on the other hand is designed to transmit efficiently (duh) and typical power levels are on the order of 15-20dBm. So saying a laptop/CPU doesn't cause any problems, therefore your WLAN card won't either is not at all valid. Furthermore, even if you are not in the frequency band, just having a sending a lot of power into the planes receivers could definitely result in some level of jamming due to distortion in the front-end or similar effects. So the intereferer does not even need to be on frequency to cause a problem. Of course, this assumes poor design in the airplanes reciever since they shold all have some substantial bandpass filtering in the RX frequencies to keep out such unwanted signals. Brian -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
