Aids HIV FAQ

USING A LAPTOP ON BOARD

Question:

>Each airline has its own rules about electronic devices, but. >c. Radio and TV receivers are always forbidden (they contain electronic >oscillators, which can act as transmitters)

That depends on the airline.  On Delta, radios are permited above 10,000 feet. Paulo —  |____o,___/ ____|  College of Computing                             |  | o’               |  Atlanta GA 30332-0280, USA  Fax: +1 404 853-0673 |

Response:

Santos) writes: >That depends on the airline.  On Delta, radios are permited above 10,000

feet. According to DL’s rules (as contained in their in-flight magazine), only VHF radios are permitted at altitude. This would preculde normal broadcast-type radios such as AM and FM.

Response:

> Santos) writes: >That depends on the airline.  On Delta, radios are permited above 10,000 > feet. > According to DL’s rules (as contained in their in-flight magazine), only > VHF radios are permitted at altitude. This would preculde normal > broadcast-type radios such as AM and FM.

The FM broadcast band (88-108 MHz) is within that range general considered "VHF" (usually, 30-300 MHz).  I suspect that the ban is primarily aimed at AM receivers, as they can emit intereference at frequencies which could interfere with some lower-frequency direction-finding receivers, although those certainly aren’t the primary navigational aids for a modern airliner. I am surprised that Delta permits VHF receivers; aviation navigational and comm channels lie just above the FM broadcast band (in about the 110-125 MHz range – not sure of the exact limits), and receivers for either side of this could certainly generate interference in this range.  On the other hand, they may specifically exclude FM broadcast receivers, even though they’re technically VHF – a common intermediate frequency in FM receivers is 10.7 MHz, and that stands a good chance of plunking an interfering signal down right in the aviation band.  (The local oscillator used in receivers is set to the desired frequency, plus or minus the intermediate frequency – so for example, 108 MHz + 10.7 MHz is 118.7 MHz, smack in the midst of the air channels.) Bob Myers  KC0EW   Hewlett-Packard Co.     |Opinions expressed here are not                    Advanced Systems Div.   |those of my employer or any other

Response:

 N> >It depends on the electronic device and of the plane type. Normally  N> at the  >begin of the flight they announce, that you should not use  N> any electronic  >device during start&landings and between this, you  N> should check with the  >board crew. Before going on a journey better  N> check with your flight- >company. Each airline has its own rules about electronic devices, but. a. In general, most, if not all, devices are banned during takeoff/landing Regular tape recorders are probably ok, but not computers, or CD players (which contain computers) b. Anything with a transmitter (CB, Ham radio, Cordless and Cellular phones) are *always* forbidden. c. Radio and TV receivers are always forbidden (they contain electronic oscillators, which can act as transmitters)

Response:

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