Is there any way to adjust the duration of the transmitted signal on the MX-3000 that I am overlooking. Trying to get my DSM-320 programmed, but if I press the Up/Down keys, it always transmits too long (resulting in the selection moving 2 Up/Down). I have tried changing the 'repeat' to 1 and turning off the 'repeat while button is pressed'; but to no avail. Don't have the same problem on a Pronto. I have tried both learning the command, as well as importing using the universal browser; but result is the same. Any tips?