ORIGINAL: jzrf6c
Funny, Spektrum reps say the older receiver are backwards compatible. I know mine work with my transmitters, DX7 & DX8 . In fact I've even used the Older ''Orange receiver'' with the newer DX8 transmitters. What does not work (out of the box) is a receiver that has more channels than the transmitter. But, it could be that I've been ripped off and neither transmitter is DSM2 or DSMX.. Does anyone know how to determine this?
Say what??????
I'm not even sure what you're asking, but will attempt to answer what I think you wanted to know;
"older receiver are backwards compatible", DSM2 rx's are compatible with all the tx's EXCEPT a DX6 which is DSM only.
"I know mine work with my transmitters, DX7 & DX8", the ONLY way that can happen is if all your rx's are DSM2 because unless it's been upgraded, the DX7 will NOT run in DSMX mode but ALL of the DSMX rx's can run in DSM2.
"In fact I've even used the Older "Orange receiver" with the newer DX8 transmitters", I've not used the "Orange receiver" but from what I know about them, they are ALL DSM2. If you have an older DX7 tx, it will run all the newer rx's in DSM2 but not DSMX rx's since those DSMX rx's will run in DSM2 mode. Your DX7 will also run the original AR6000 rx which is a DSM protocol, it takes quite a bit longer for the tx/rx to link up and the tx batteries don't last as long since the DSM mode requires more power. An AR6000 is the ONLY rx that an original DX6 tx will run, a DX6i will run all the rx's the DX7 will. The DX8 will run all DSM2 and DSMX rx's but WILL NOT run the DSM AR6000 rx.
As to why you're having difficulties running higher channel count rx's than your tx's have, I don't have any idea. Those rx's should bind to your DX7 and DX8 just fine but you will only have the number of channels on your tx available.
Now if your DX7 tx is actually a new DX7s OR it's been upgraded to DSMX, then the whole story changes some....
