Further to the comments and tips you gave me.
I diconnected PPM input to RF Module and tried,
1. Tying it to GND
2. Tying it to 3.3v.
3 Leaving it floating.
The servos in all cases still received these pulses.
I took the rf module out of one radio( not experiencing the problem) and put it into the other one.
This one now works correctly.
Both of my radios have updated f/w. One has Open9x/er9x and the other has Ersky9x.
So to me it looks like the Flysky modules f/w has been changed.
Good to see your radios are experiencing the same problem.
When i scope ppm input on both of my radios with the stock flysky rf modules the ppm line is the same.
Its just one rf module seems to be sending some data to the receiver which outputs 1ms pulse immediately power is applied.
As you are more Advanced in the possible fixes,would you mind adding your comments to the 9x
forums on this issue.
Have pm u re Module.
Edited by iwik, 16 September 2012 - 02:00 AM.