Reply With QuoteBugger, what can I say other than sorry.
I would of thought they would of said something seeing where it was being shipped to.
Fossicker
Bugger, I ordered one a few weeks ago and they did not mention this to me???
Wizard
SupporterBugger, what can I say other than sorry.
I would of thought they would of said something seeing where it was being shipped to.
Master
I see the keys advertised on the BPUtah site are the 315 MHz frequency. The other frequency that I know of is 433 MHz. The frequency refers to what the CLS, (Central Locking System), receiver listens for, and not the engine start transponder.
The RF frequency is written on the label that is covered up by the rotating metal key portion. The 315 MHz frequency is what shows on my key is here in Canada. I suppose it is the same for USA.
It may be that Australia is 433 but it should say for certain on the key label.
Assuming the key fob after programming, works for the CLS and engine start, the metal keyed portion from the old Key Fob is transferred from the old fob to the new one. The metal blade bit is held in by a roll pin - it just pushes out.
The chances of a local key cutter being able to duplicate a new factory key blank is unlikely as the steel in the factory blank is some sort of hardened steel relative to what normal aftermarket blanks are. About once a year, the factory Land Rover replacement key cutter goes out of tune and they find out after distributing a few hundred defective ones around the world.
That is one reason higher end vehicle are car jacked now, rather than being stolen in the old sense of the term.
Fossicker
Don't be sorry. Appreciate your help.
I will try and make contact with them and hopefully get a refund.
Master
bp is pretty good. You might let them know what the frequency is in Australia so they can post a warning.Originally Posted by dwaters
Also is it the 433 MHz number I presumed it to be?
Master
SubscriberAlso is it the 433 MHz number I presumed it to be?[/QUOTE]
Hi BB, correct it is 433 mhz. I was curious as to how each key works only for the one car? Is it that they alter the frequency slightly? ie:433.75 then 433.76 ??
BTW thanks for all your very informative posts, I actually make an effort to read your posts as you seem to do alot of specific research about the topics before you post, well done and keep up the good work, as it helps others, like me,from having to wade through loads of information to obtain what is really pertinent.
regards
Brian
Master
I think the frequency is very stable, as in 433.000, (Drivesafe better understands this stuff), and what changes is what I regard as a true digital signal that is generated and transmitted and then understood by the receiver that I think also talks back.
The signal code generated changes each time it is used and due to smart math, the receiver knows what to expect, or more correctly 255 other possible choices, sort of.
The units are not restricted to a mere 256 choices however, just that each time, the sender could send one of 255 other signals. A thief would have to guess what set of 256 within the millions available is in use at that time, plus there is now some way to make the guess even more difficult even if he intercepts the signal. Early designs had that problem.
In a more practical sense, your kids would have to push the lock unlock button 255 times at some distance from your 3 before the key would become disabled. I say disabled, as per attached, there is a procedure that works with some code hopping systems to reactivate - probably not LR, as it is do it yourself, free, and does not require the dealer.
The Texas Instruments 27 page pdf below is even more detailed if one understands that sort of stuff. I doubt that LR uses TI, probably some German or Japanese electronics instead, but the concept will be the same. That is why I think the reactivate function provided will not work for our door lock setup. Additionally, I think LR uses what is called Cryptographic Electronic Code which is more complicated than mere Rolling Electronic Code - as in billions of codes or is it trillions? - only Bankers understand those kind of numbers.
http://auto.howstuffworks.com/remote-entry2.htm
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