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Re: Canarsie CBTC

Posted by Stephen Bauman on Mon Jun 13 10:40:52 2005, in response to Re: Canarsie CBTC, posted by SelkirkTMO on Mon Jun 13 10:28:17 2005.

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Inductive loop can be subjected to serious "common mode noise" if the input amplifiers aren't properly balanced for maximum CMRR.

I'm not disputing that. This just isn't the technology that Canarsie is using.

Inductive Loop hopes to combat RFI by having the transmitting and receiving antennas in close proximity. It does very little in the way of tailoring the signals to combat noise. IL's achilles' heel is a noisey ambient environment - such as can produced from nearby high voltage transmission lines. IL also has a fixed position, one cannot even change the polarization plane to effect significant noise reduction.

Just a thought for those who have lamented the TA for not using "proven" IL instead of RF.

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