Trevor Grace 1 Posted July 26, 2020 Share Posted July 26, 2020 what is forwards or backwards compatible as in receivers !!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted July 26, 2020 Share Posted July 26, 2020 2.4GHz or 35MHz? Manufacturer? We can't answer without some more info... Quote Link to comment Share on other sites More sharing options...
simon barr Posted July 26, 2020 Share Posted July 26, 2020 You can get forward and reverse speed controllers.... is this what you mean? Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted July 26, 2020 Share Posted July 26, 2020 ...or is it a general enquiry about the terminology? If so, backward compatibility means that an older receiver will still work with a newer version (or software release) of the transmitter. Forward compatibility? Seems a slightly nebulous term but it probably refers to a manufacturer's philosophy for forthcoming products... Quote Link to comment Share on other sites More sharing options...
Trevor Grace 1 Posted July 26, 2020 Author Share Posted July 26, 2020 I have seen this term when looking for DSM2 Rx as opposed to DSMX. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted July 26, 2020 Share Posted July 26, 2020 Looking back, Trevor has a DX7 DSM2 Transmitter But this will not bind with NEW DSMX receivers Though a New DSMX transmitter can sometimes bind with a DSM2 receiver. Am second guessing the problem is something to do with this The DX7 is compatible with DSM2 Some DX6i Tx will bind with either old DSM2 and new DSMX Receivers Edited By Denis Watkins on 26/07/2020 12:35:32 Quote Link to comment Share on other sites More sharing options...
Trevor Grace 1 Posted July 26, 2020 Author Share Posted July 26, 2020 well done that man (Denis W.) Major prob trying to find DSM2 Rx. Quote Link to comment Share on other sites More sharing options...
kc Posted July 26, 2020 Share Posted July 26, 2020 Is that correct Denis? The way I read the Spektrum Rx manuals is that all DSMX RX are compatible with DSM2 Tx. So surely any DSMX Rx will works and you dont need to find a DSM2 Rx. Or am I wrong? Edited By kc on 26/07/2020 12:52:46 Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted July 26, 2020 Share Posted July 26, 2020 New radios don't do the dsm2 protocol, so a new radio won't work on dsm2 rx's, but a old radio will work on dsm-x rx's as the rx will roll back to dsm2. Quote Link to comment Share on other sites More sharing options...
Brian Cooper Posted July 26, 2020 Share Posted July 26, 2020 Whilst it is perfectly feasible for a Rx to be backwards compatible -- the technology has already existed, and DSM2/ DSMX is a prime example of this --- it is not possible to "future proof" a product when the future technology has not yet evolved or been invented. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted July 26, 2020 Share Posted July 26, 2020 Have lost track with the comments But the Orange and Lemon DSM2 from Inwoods and RapidRC will work Quote Link to comment Share on other sites More sharing options...
Trevor Grace 1 Posted July 26, 2020 Author Share Posted July 26, 2020 so can i safely use DSM2/DSMX and also DSMX/DSM2 with my old DX7 tranny. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted July 26, 2020 Share Posted July 26, 2020 Any that will bind, and range test correctly, and set to failsafe, are safe to use In an earlier post Trevor, you stated that your DX7 was DSM2. Early DX was DSM2 Today the protocol is DSMX Quote Link to comment Share on other sites More sharing options...
John Lee Posted July 26, 2020 Share Posted July 26, 2020 Just check the manual of the receiver you are interested in. They are all available on the Spektrum website & you will find a compatibility paragraph such as: 'The Spektrum AR620 receiver is a full range telemetry receiver featuring DSM® technology and is compatible with all Spektrum and JR® aircraft radios that support DSM2® and DSMX® technology.' so in this case the answer to you last question is 'yes' for this receiver (AR620) Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted July 26, 2020 Share Posted July 26, 2020 As Denis W points out Orange and Lemon do still make (or have in stock on their web site) DSM2 compatible receivers. These will work on any DSM2 Tx or a TX with both DSM2 & DSMX. The backward compatibility between DSMX and DSM2 is due to the capability of the TX not the DSMX protocol. Any DSMX Tx made in the last few years will not work with a DSM2 receiver. Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 26, 2020 Share Posted July 26, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted July 26, 2020 Share Posted July 26, 2020 Posted by Steve J on 26/07/2020 16:10:45: I just tried binding my '09 vintage DSX9 (22ms, 1024 bit DSM2) with an AR6260 bought in '14 and an AR8010T bought in '17. No problems with the 6260. After a few goes I managed to get solid orange LEDs on the 8010 and its remote, but there is no life on the outputs. Are the servos not 11 ms Steve, it just sticks in me head that we set 11ms Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 26, 2020 Share Posted July 26, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
john davidson 1 Posted July 27, 2020 Share Posted July 27, 2020 re backwards compatibity dsm2 and dsmx . Reading my manual for dx6 (well it is a wet day) on page 20 under modulation quote "when dsmx is active , the transmitter operates in DMSX with DSMX receivers and DSM2 with DSM2 receivers. The transmitter automatically detects DSM2 or DSMX during binding and changes the mode automatically to match the receiver type you are using. if you select DSM2 , the transmitter operates in DSM2regardless whether it is bound to a DSm2 or DSMXreceiver" I have never manage to bind a DSMX tranny to a DSM2 receiver , has frame rate on page 20any bearing on this? Edited By john davidson 1 on 27/07/2020 15:47:35 Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 27, 2020 Share Posted July 27, 2020 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
SR 71 Posted July 27, 2020 Share Posted July 27, 2020 Pleased i got rid of my spectrum rubbish years ago Quote Link to comment Share on other sites More sharing options...
martin collins 1 Posted July 27, 2020 Share Posted July 27, 2020 Yawn.......... Quote Link to comment Share on other sites More sharing options...
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