Has anyone figured out how to do this? I've played around with everything I can think of and can't get it to set. Thanks

The manual says to do it as follows: Click on the center of the right knob on the transponder. The first digit should start flashing. Click above or below the knob to increase or decrease the digit. Then, click the center to move to the next digit again, then repeat until your squawk code has been entered. -Rob