JMRI keeps a large collection of manufacturers and their decoders. ?If this is a decoder JMRI does not know about....well.......
In that case, take your decoder and identify what it is . . look at it if you have to. ?Find the owner's manual or contact the manufacturer or look for a pdf on line. ?Use your NCE/Digitrax throttle and set it up by hand.
When working - - -document your settings!!
Bob S