Smallest size heli for a satellite installation

[oldcelt]

Spektrum started off with a system called DSM, then they brought out DSM2 and then changed to DSMX. DSM2 was compatible with JR. DSMX isn't. Your tx may be DSM2 or DSMX or both. You can buy very cheap orange transmitters that work with Spektrum. There are also Futaba clones. DSM2 selected two unused frequencies and used those. DSMX uses many frequencies and hops from one to the other. Spektrum did claim for a long time that their system was better then went to frequency hopping. Frequency hopping may well reduce the masking and reflection problem as each frequency will have a different number of wavelengths to any object. DSM2 would have different random results each time you switch on.

Don't get too worried about these problems. Radio problems on helis are quite minor compared with all the other things that go wrong.

The DX6i has an Auto - DSM2 - DSMX selection option in its menu.

[Mark_T]

The DX6i has an Auto - DSM2 - DSMX selection option in its menu.

The new one does, the older ones do not, as Spektrum rather unhelpfully updated the DX6i from DSM2 to DSMX without changing the model name.