Hi Ingo

Code wise, I am doing the same configuration with the exception that my BRG con values are for 125Khz and 16Mhz. Beyond that I am setting data byte values for tx. I will send you code for perusal in due course.

I think given what I am seeing with the scope, it is clear that there is something fundamentally wrong with timing. You are correct in your suggestion about the PLL. This is the first time I have used this particular pic. I have just checked the data sheet and it looks like I may have to set the configuration. Need to read up a bit as there are a few registers involved.

The transceiver is MCP 2551, I am seeing very clean signals on the twp so I dont think the resistors are presenting a problem. Depending on the outcome of the PLL investigation, I can remove one, then both to check the effect.

Rgds

Tim