you are correct...but I am also a ham radio operator and an over the road truck driver at one time...I know which end of a soldering iron to pick up.... I designed this system to a large degree...or have had to fix what the original supplier provided ....a real real long story...maybe will post once we get this fixed I will let you guys know if it is the CPR the more we talk about it here the more we are convinced this is the problem but will check tonight...I appreciate the feedback because as you well know...when you have a technical problem that does not make sense you got to bounce ideas off other folks to see if you can sort it out...thanks