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Post by cbrown on May 4, 2016 12:53:33 GMT -5
]I'm seriously thinking about penning a letter to the FCC inquiring about the legality of this system which from where I am standing, is in clear violation of part 95 for class D citizens band radio spectrum usage. Power output, I'm betting, is also in excess of the 4 watt requirement, in order to be able to activate and power those transponders. Something like this should be legal on the class "C" frequencies, so all they would have to do is drop them down to 27.095, and they'd be good to go..... I agree, I can't imagine the FCC would let them use the 27.115 MHz frequency. Using the so called "A" channels might be legal.
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Post by cbrown on May 4, 2016 13:04:15 GMT -5
Of course I could put on my Bluebird conspiracy hat and postulate that the FCC is secretly giving the wink and nod to anyone who deploys devices which will trash the CB band out of existence. Or if you were really paranoid, they are using this to shut down the current CB spectrum because all the export radios and illegal amplifiers are endangering passenger trains...
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Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on May 5, 2016 6:49:39 GMT -5
]I'm seriously thinking about penning a letter to the FCC inquiring about the legality of this system which from where I am standing, is in clear violation of part 95 for class D citizens band radio spectrum usage. Power output, I'm betting, is also in excess of the 4 watt requirement, in order to be able to activate and power those transponders. Something like this should be legal on the class "C" frequencies, so all they would have to do is drop them down to 27.095, and they'd be good to go..... I agree, I can't imagine the FCC would let them use the 27.115 MHz frequency. Using the so called "A" channels might be legal. The only issue that might be a problem for the class "C" channels would be power output. I believe that 4 watts is the max power limit for 5 of the class C channels (at one time channel 23 was a shared class C/D channel and class C users could run up to 25 watts there), and although I have not seen the technical specs for the Siemens ACSES system, power output would have to exceed 4 watts in order to be able to effectively power the track sensors. The antenna is not an efficient radiator, and is constructed to direct the power straight down which should limit the radiated interference (which still manages to cover at least 2 miles of distance), which makes the case for greater than 4 watt transmitters. I am curious about the deliberate choice of 27.115 as their frequency of operation. It could have been anywhere, and even a random, non standard channel frequency (27.100). I could have been 26.500 or 27.500, or so many places that are in little used allocations. Why the deliberate choice of a US CB channel? I'd love to have been a fly on the wall at that product development meeting........
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