Used my Global Sat Bt-338 on flight from Vancouver. Took quite a while to get the sats, but once up, I was able to get info all the way across Ontario.
According to research done by myself and others; there's absolutly no evidence whatsoever supporting the theory of cell transmissions interferring with onboard nav systems. Proven or not; I kinda feel the regulations are in place..."just in case"
All radio receivers have a tiny bit of transmitter in them, it's how they work. However, I agree that the regulations are overly cautious, though some gadgets like those radar detectors can put out a lot of hash I guess.
If there was really a chance that your cell phone or GPS or laptop could crash the plane, they would not let you take them on board, period.
"Nail clippers? Hand them over, dirtbag. That cell phone? If you turn it on, the plane may dive into the ground and explode in a giant ball of flame, seared flesh and twisted metal... so please, please don't turn it on. We're serious about this--you'll kill us all, so leave it off. Really. Just turn it off right now and put it away. Oh, you'll have to give me those knitting needles though."
I always thought that airlines didn't want you using a GPS because that way if they screwed up the flight there would be less data to incriminate them. ;)
All radio receivers have a tiny bit of transmitter in them, it's how they work. However, I agree that the regulations are overly cautious, though some gadgets like those radar detectors can put out a lot of hash I guess.
Well, not a transmitter on purpose, but yeah, a frequency mixer to extract intelligence from the radio signal.
Originally Posted by ironchef
"Nail clippers? Hand them over, dirtbag.
Instead of racial profiling, people being pulled out of the line for closer inspection are now well-manicured.
I tried last week from my trip to chicago from ny.. It worked but I only had it up for 10 mins. Using my axim with a bt gps hiacom 303-iii... Wanted to capture the whole flight but I didn't want to hold my gps to the window for 2 hours.
two months ago I tried my Pharos GPS360 in a plane, i was sitting next to window, I thought it will be cool to see my position on a map, but unfortunately, I could not get any signal.
Well, not a transmitter on purpose, but yeah, a frequency mixer to extract intelligence from the radio signal. Instead of racial profiling, people being pulled out of the line for closer inspection are now well-manicured.
.
Actually, any radio that has a mixer stage will have what is known as 'receiver conducted spurs'. Basically what that means is that the radio signals that are picked up at the antenna, when mixed with the internal local oscillator (LO) inside the receiver to produce an intermediate frequency (IF), also produce the sum and difference frequencies of all the incoming signals mixed with the LO. Simple, eh :approve:
In simple terms, your receiving antenna actually will radiate (ie:transmit) very low level signals produced inside of the receiver. The FCC has maximum allowable levels for conducted spurs. Well designed radios will have virtually no conducted spurs.
This is actually used in England, where the government insists that every radio receiver and TV is licensed and to enforce that, they have inspectors that drive around in vans that have very sensitive antennas that 'sniff' out the local oscillator frequencies in the consumer gear that can be picked up due to radiation from the equipment.
yes sir i did this on trip from north carolina to texas, took for ever to connect. but once it was connected it didnt drop it was insane. after i played with it on my axim and treo i played with it on my laptop, that was awesome b/c i traced the route and saved the file info with the trip data for further look ups. the most awesome thing though is i tried the wififofum on the axim and i was able to get some hot spots but only as we came to low alt. a few miles before landing. loaded them on google maps and it was pretty awesome.
i have also tried my gps on a ferry in NY that was a very cool contrast as opposed to the plane, pretty cool to see yourself going over the water.
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