On Oct 31, 2021, at 11:59 AM, Bob McGraw - K4TAX <rmcgraw@...> wrote:

Then the question remains, do you have communications with the KAT500?   If not, then the port on the KAT500 may be defective or the cable is defective.   

I trust you do have the correct cable between the computer and KAT500 and it is connected to the PC Data port on the KAT500.  Do check all connections.   See page 20 in the KAT500 manual for cable requirements. 

73
Bob, K4TAX