I am trying to use Xtend-PKG ( and OEM) RF modems in the User Defined mode - setting the MT (MultiTranmit) to 0 so RR (retries) will not be ignored. Using the XCTU program I wrote the new values in to the registers but when I read them back some of the units will have MT reverted from 0 back to 3 again. On the PKG version the dipswitches are set to 100011 and the firmware version is 2067. I've tried restoring the factory defaults using XCTU and this doesn't help. Are there other settings that need to be changed to allow the User Defined mode to work?
Also, how is this handled in OEM - does it assume User Defined mode - if not how do I put it in that mode?