Anyone correct me if I am wrong here...

If you ahve the DC trigger connected to trigger 1, anytime that the 990 is powered on, the device that is connected to the DC trigger 1 should turn on as well.

Trigger 2 can be setup based on inputs... but trigger 1 should be set for power on to the 990. I do not think that you can even change that....

Hope that helps a little.

ian