ORIGINAL: Crewcut
Try switching 10x to transmitt on PPM
The 945 is clearly a PCM receiver, so that won't work. Do you have the appropriate crystal for the 945, in the red plastic holder? If you just put the grey crystal from a single conversion rx into the 945, is will **NOT** work - the crystals are different. FWIW, I have a 945 on my 10X, and it was no issue at all - they work flawlessly.
- Tim