It's on it's way back to me. I think the software change is the biggest deal with this upgrade, but it also includes:
-three signal coupling capacitors in the digital input section
-an isolation pulse transformer added to the coax-1input
-some input impedance resistors were changed, and the input ground was changed to further isolate power line irregularities
-three signal coupling capacitors in the digital input section
-an isolation pulse transformer added to the coax-1input
-some input impedance resistors were changed, and the input ground was changed to further isolate power line irregularities