Welcome!Thanks! definitely no newbie to radios... new to trunking yes. I have a couple of APx radios and APX mobiles.
Make sure that the first thing you do is update the firmware. This will give better access to the "Threshold" setting that you will need to manually set for better sound clarity on the CSERN setup!
Any questions, don't hesitate to ask!
P.S. Read the posts prior to this, you will find answers to some questions you might have concerning programing and the database on RR.