jack lackmaker Posted November 17, 2008 Share Posted November 17, 2008 a question about 2.4 ghz how do you know what will bind with what and how many different systems are there? Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted November 17, 2008 Share Posted November 17, 2008 Basically two different mainstream system Jack. FASST (which is Frequency hopping based )is deployed by Futaba and this involves the Tx and Rx constantly "hopping" around the various channels very very quickly and (hopefully ) staying synchronized with each other all the time they do it. This system is the oldest version of spread spectrum technologyThe Spektrum system is DSSS (Direct Sequencing Spread Spectrum) and Spektrum call their particualr system DSM (Digital Spectrum Modulation). The later and current Spektrum system is actually DSM2 which provides better and faster communication of the data than the older DSM system, and also adds the benefit of far greater battery efficiency. DSM2 receivers actaully "transmit" certain coded data to the TX during a bind procedure ( see below )Each system is NOT compatible with one other. Each system has its own version of "binding" the Rx with the Tx in order to ensure that the receiver will only listen to and respond to its own particular transmitter ( and relevant model memory selected ). Quote Link to comment Share on other sites More sharing options...
winchweight Posted November 17, 2008 Share Posted November 17, 2008 JR 2.4ghz tx work with Spektrum 2.4ghz rx though. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted November 17, 2008 Share Posted November 17, 2008 Yes because Spektrum stuff was / is basically JR based anyway. Quote Link to comment Share on other sites More sharing options...
jack lackmaker Posted November 17, 2008 Author Share Posted November 17, 2008 thanks for the info but how do you know what system is used with ready to fly models in most cases they do not list this information and when you try it you find the transmitter will not bind with the receiver. Quote Link to comment Share on other sites More sharing options...
Doug Ireland Posted November 17, 2008 Share Posted November 17, 2008 Thats a good question Jack, something I've wondered about too. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted November 17, 2008 Share Posted November 17, 2008 I guess you will have to ask the retailer /supplier /manufacturer and hope they know. Quote Link to comment Share on other sites More sharing options...
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